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If you want to keep the bike standard,  order the “standard” insert. If you wanted a more aggressive power setup,  or you are going high in altitude then you could experiment with a “high” or “very high” compression insert.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":43145294545076,"sku":"508","price":94.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/1597481522.jpg?v=1715892346"},{"product_id":"gas-gas-txt-pro-125-02-21-replica-pison-kit-2-ring-22766a-53-95mm","title":"GAS GAS TXT\/PRO 125 02-21 REPLICA PISON KIT (2 RING) 22766A 53.95mm","description":"\u003ctable class=\"table table-striped\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePiston\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMM\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e22766A\u003c\/th\u003e\n\u003ctd\u003e53.95mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth 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If you wanted a more aggressive power setup, or you are going high in altitude then you could experiment with a “high” or “very high” compression insert.\u003c\/p\u003e\n\u003cp\u003eTHIS OUTER HEAD IS SAME FITMENT AS SHERCO \/ SCORPA\u003c\/p\u003e","brand":"S3","offers":[{"title":"Black","offer_id":43686700187828,"sku":"ST-923B","price":83.48,"currency_code":"GBP","in_stock":true},{"title":"Titanium","offer_id":43686700220596,"sku":"ST-923T","price":83.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/S3-GG-TXT-HEAD-OLD-VERT.webp?v=1730216991"},{"product_id":"stars-cylinder-head-inserts-for-vertigo","title":"S3 STARS Cylinder Head inserts for VERTIGO","description":"\u003cp\u003eSpecific compression inserts design, offers the possibility to adapt engine setting to your choice and needs\u003c\/p\u003e","brand":"S3","offers":[{"title":"250 \/ High","offer_id":43686703202484,"sku":"","price":63.97,"currency_code":"GBP","in_stock":true},{"title":"250 \/ Low","offer_id":43686703235252,"sku":"","price":63.97,"currency_code":"GBP","in_stock":true},{"title":"300 \/ High","offer_id":43686703268020,"sku":"","price":63.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/ST-GGdetalls31.webp?v=1730218369"},{"product_id":"stars-cylinder-head-inserts-for-sherco-scorpa-250-290-300","title":"S3 ‘STARS’ Cylinder head inserts for SHERCO\/SCORPA 250\/290\/300","description":"\u003cp\u003eChange compression of your S3 STARS cylinder head on Sherco.\u003c\/p\u003e\n\u003cp\u003eThere are Low, Standard and High compression inserts available for 250cc and 290cc and 300cc\u003c\/p\u003e\n\u003cp\u003eTHESE ARE THE SAME FITMENT AS GAS GAS OLD TYPE INSERTS.\u003c\/p\u003e","brand":"S3","offers":[{"title":"250 \/ High","offer_id":43686708740276,"sku":"S3-SH-IN-250-A","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"250 \/ Low","offer_id":43686708773044,"sku":"S3-SH-IN-250-B","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"250 \/ Standard","offer_id":43686708805812,"sku":"S3-SH-IN-250-STD","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"290 \/ High","offer_id":43686708838580,"sku":"S3-SH-IN-290-A","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"290 \/ Low","offer_id":43686708871348,"sku":"S3-SH-IN-290-B","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"290 \/ Standard","offer_id":43686708904116,"sku":"S3-SH-IN-290-STD","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"300 \/ High","offer_id":43686708936884,"sku":"S3-SH-IN-300-A","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"300 \/ Low","offer_id":43686708969652,"sku":"S3-SH-IN-300-B","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"300 \/ Standard","offer_id":43686709002420,"sku":"S3-SH-IN-300-STD","price":53.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/ST-GGdetalls31_6e9936bf-ee3e-4f08-8b4a-37dd9c7630d4.webp?v=1730218751"},{"product_id":"stars-cylinder-head-inserts-for-gas-gas-pro125","title":"S3 ‘STARS’ Cylinder head inserts for GAS GAS PRO125","description":"\u003cp\u003eChange compression of your S3 STARS cylinder head on your GG PRO125…\u003c\/p\u003e\n\u003cp\u003eThere are 3 available….VERY VERY HIGH(AAA), VERY HIGH(AA), HIGH(A).\u003c\/p\u003e","brand":"S3","offers":[{"title":"Pro 125 - High (A)","offer_id":43686710804660,"sku":"","price":53.84,"currency_code":"GBP","in_stock":true},{"title":"Pro 125 - Very Very High (AAA)","offer_id":43686710837428,"sku":"","price":53.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/ST-GGdetalls31_784ecff9-ebca-4856-9137-5be3425cb3cf.webp?v=1730219326"},{"product_id":"stars-cylinder-head-gas-gas-2014-to-2022-txt250-280-300cc-cover-only-horizontal-new-type-st-1060","title":"S3 Stars Cylinder Head GAS GAS 2014 to 2022 TXT250\/280\/300cc ‘Cover only – Horizontal New Type’ ST-1060","description":"\u003cp\u003eS3 Stars Cylinder Head, Outer part only. 2014 to 2022\u003c\/p\u003e\n\u003cp\u003eThis Outer is the latest S3 Head for GAS GAS TXT 250\/280\/300 with the horizontal water hose outlet part number ST-1060\u003c\/p\u003e\n\u003cp\u003eIf you need an insert make sure you ask for the very latest design ‘horizontal new type’.\u003c\/p\u003e\n\u003cp\u003eThe various inserts are available separately on this website.\u003cbr\u003eIf you want fairly flat power for beginners or for really slippery conditions then you would set the bike up with a “low” compression insert. If you want to keep the bike standard, order the “standard” insert. If you wanted a more aggressive power setup, or you are going high in altitude then you could experiment with a “high” or “very high” compression insert.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":43686711951540,"sku":"ST-1060-R","price":94.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/S3-GG-TXT-HEAD-NEW.webp?v=1730219606"},{"product_id":"beta-evo-cylinder-head-inserts-for-125-250-290-and-300cc","title":"S3 BETA EVO Cylinder head inserts for 125, 250, 290 and 300cc","description":"\u003cp\u003eS3 Cylinder head inserts for Beta Evo 125.250, 290 \u0026amp; 300 models\u003c\/p\u003e","brand":"S3","offers":[{"title":"125 \/ High","offer_id":43686713753780,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true},{"title":"125 \/ High High","offer_id":43686713786548,"sku":"","price":53.85,"currency_code":"GBP","in_stock":false},{"title":"125 \/ Low","offer_id":43686713819316,"sku":"","price":53.85,"currency_code":"GBP","in_stock":false},{"title":"250 \/ High","offer_id":43686713852084,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true},{"title":"250 \/ Low","offer_id":43686713884852,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true},{"title":"290 \/ High","offer_id":43686713917620,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true},{"title":"290 \/ Low","offer_id":43686713950388,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true},{"title":"300 \/ High","offer_id":43686713983156,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true},{"title":"300 \/ Low","offer_id":43686714015924,"sku":"","price":53.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/ST-GGdetalls31_4623eff0-9dae-4630-8a71-b9d03e65ec2a.webp?v=1730219694"},{"product_id":"scorpa-trial-pistons-250-290-300-s3-racing-1","title":"SCORPA Trial – Pistons – 250\/290\/300 – S3 Racing","description":"\u003cp\u003e250cc – PI-SH-TR250\u003c\/p\u003e\n\u003cp\u003e290cc – PI-1280\u003c\/p\u003e\n\u003cp\u003e300cc – PI-1300\u003c\/p\u003e\n\u003cp\u003eComposition \u0026amp;amp; treatment:\u003cbr\u003e• Top quality Aluminium-Silicium alloy\u003cbr\u003e• Casted or forged\u003cbr\u003e• Molybdenum disulfide protective layer.\u003cbr\u003e• Equiped with nitrided steel rings\u003c\/p\u003e\n\u003cp\u003eFeatures:\u003cbr\u003e• Lightweight and resistant\u003cbr\u003e• Limits the vibrations\u003cbr\u003e• The engine will build up revs faster\u003c\/p\u003e\n\u003cp\u003eThe kit includes:\u003cbr\u003e• 1 Piston\u003cbr\u003e• 2 Rings\u003cbr\u003e• 1 Pin\u003cbr\u003e• 2 Snap clips\u003c\/p\u003e","brand":"S3","offers":[{"title":"250 \/ A","offer_id":43686720405684,"sku":"","price":172.35,"currency_code":"GBP","in_stock":true},{"title":"250 \/ B","offer_id":43686720438452,"sku":"","price":172.35,"currency_code":"GBP","in_stock":true},{"title":"250 \/ C","offer_id":43686720471220,"sku":"","price":172.35,"currency_code":"GBP","in_stock":true},{"title":"290 \/ A","offer_id":43686720503988,"sku":"","price":167.38,"currency_code":"GBP","in_stock":true},{"title":"290 \/ B","offer_id":43686720536756,"sku":"","price":167.38,"currency_code":"GBP","in_stock":true},{"title":"290 \/ C","offer_id":43686720569524,"sku":"","price":167.38,"currency_code":"GBP","in_stock":true},{"title":"300 \/ A","offer_id":43686720602292,"sku":"","price":167.38,"currency_code":"GBP","in_stock":true},{"title":"300 \/ B","offer_id":43686720635060,"sku":"","price":167.38,"currency_code":"GBP","in_stock":true},{"title":"300 \/ C","offer_id":43686720667828,"sku":"","price":167.38,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-s3-racing-for-beta_5830f28f-76b2-4ce1-9905-b1ee6e1eb0ae.webp?v=1730220895"},{"product_id":"vertigo-trial-pistons-s3-racing","title":"S3 250cc Piston Kit - GasGas, Vertigo, TRS, Beta","description":"\u003cp\u003eSuperb quality longlife S3 Racing piston kit for the following bikes:\u003cbr\u003eGasGas Pro 250 - 2002 onwards\u003cbr\u003eTRS One \/ RR \/ Gold 250 - 2016 onwards\u003cbr\u003eVertigo 250 - 2017 onwards\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eKit includes piston, rings, gudgeon pin and clips.\u003cbr\u003e\u003cbr\u003eAlso listed as suitable replacement piston for the following bikes.\u003cbr\u003eJotagas 250\u003cbr\u003eBut please check very carefully as the distance from the centre of the gudgeon pin to the edge of the piston may be slightly different so the squish clearance must be checked and the base gasket thickness adjusted to suit.\u003cbr\u003eBeta Techno 250\u003cbr\u003eBeta Rev 3 250 \u003cbr\u003eBeta Evo 250 2011 to 2022\u003c\/p\u003e\n\u003cp\u003eOn the Beta Techno, Rev 3 and Evo 250 using this S3 piston will very slightly lower the compression, this can easily be compensated for with the base gasket thickness.\u003c\/p\u003e\n\u003cp\u003eNominal Size 72.50mm\u003cbr\u003eSize A 72.46mm\u003cbr\u003eSize B 72.47mm\u003cbr\u003eSize C 72.48mm\u003c\/p\u003e\n\u003cp\u003e18mm Gudgeon Pin by 56mm long\u003c\/p\u003e\n\u003cp\u003eCentre of the gudgeon pin to the top edge of the piston 28.9mm\u003c\/p\u003e\n\u003cp\u003eOverall height 66mm\u003c\/p\u003e\n\u003cp\u003eWeight including rings, gudgeon pin and C-clips 270 grams\u003c\/p\u003e","brand":"S3","offers":[{"title":"A","offer_id":44160038961332,"sku":null,"price":172.35,"currency_code":"GBP","in_stock":true},{"title":"B","offer_id":44160038994100,"sku":null,"price":172.35,"currency_code":"GBP","in_stock":true},{"title":"C","offer_id":44160039026868,"sku":null,"price":172.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-s3-racing-for-beta.avif?v=1773404688"},{"product_id":"s3-piston-kit-gasgas-pro-trs-vertigo-280","title":"S3 Piston Kit - GasGas Pro, TRS, Vertigo 280","description":"\u003cp\u003e\u003cspan\u003eSuperb quality longlife forged S3 Racing piston kit to fit:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eGasGas Pro 280cc from 2002 to present\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTRS 280cc from 2016 to present\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eVertigo 280cc from 2020 to present\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eKit includes piston, rings, gudgeon pin and clips\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSize A 75.965mm\u003cbr\u003eSize B 75.975mm\u003cbr\u003eSize C 75.985mm\u003cbr\u003e18mm Gudgeon Pin by 56mm long\u003cbr\u003eCentre of the gudgeon pin to the top edge of the piston 28.7mm\u003cbr\u003eOverall height 66mm\u003cbr\u003eHeight from top to the edge of the piston 3.9mm\u003cbr\u003eWeight including rings, gudgeon pin and C-clips 318 grams\u003c\/p\u003e\n\u003cp\u003eAlso listed as suitable replacement piston for the following bikes.\u003cbr\u003eBeta 270\u003cbr\u003eSherco 290\u003cbr\u003eJotagas 280\u003cbr\u003eOssa 280 (Barrel would need re-boring)\u003cbr\u003eBut please check very carefully as the distance from the centre of the gudgeon pin to the edge of the piston may be slightly different so the squish clearance must be checked and the base gasket thickness adjusted to suit.\u003c\/p\u003e\n\u003cp\u003eFor example on the Sherco, this piston is 2mm shorter, 0.015mm larger in diameter, 0.4mm shorter from the centre of the gudgeon pin to the edge of the piston and the radius on the top of the piston is larger so the height from top to the edge of the piston is 0.6mm shorter than the original.\u003cbr\u003eSo if you have your cylinder bore replate to fit this piston, you can use it but it will lower the compression slightly and increase the squish clearance, unless you shorten the cylinder by 0.4mm or reduce the base gasket thickness but I wouldn't recommend going below 0.5mm on the Sherco base gasket. To do it properly the head would need reshaping to suit the larger radius on the top of the piston and bring the compression ratio back to standard.\u003c\/p\u003e","brand":"S3","offers":[{"title":"A","offer_id":44160082084020,"sku":null,"price":167.38,"currency_code":"GBP","in_stock":true},{"title":"B","offer_id":44160082116788,"sku":null,"price":167.38,"currency_code":"GBP","in_stock":true},{"title":"C","offer_id":44160082149556,"sku":null,"price":167.38,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-s3-racing-for-beta.avif?v=1773404688"},{"product_id":"s3-300-piston-kit-gasgas-pro-sherco-trs-beta-scorpa-vertigo","title":"S3 300 Piston Kit - GasGas Pro \/ Sherco \/ TRS \/ Beta \/ Scorpa \/ Vertigo","description":"\u003cp\u003eSuperb quality longlife S3 Racing piston kit, kit includes piston, rings, gudgeon pin and clips.\u003cbr\u003e\u003cbr\u003eFits:\u003cbr\u003eGasGas Pro 300 - 2002 onwards - Standard, Racing, Raga and Factory models.\u003cbr\u003eTRS 300 - 2016 onwards\u003cbr\u003eSherco ST 300 \/ 305 - 2011 onwards\u003cbr\u003eSherco Cabestany - 2011, 2012, 2013\u003cbr\u003eSherco Factory 300 - 2016 onwards\u003cbr\u003eScorpa Twenty 300 - 2015 onwards\u003cbr\u003eBeta Evo 300 - 2011 onwards\u003cbr\u003eVertigo 300 - 2016 onwards\u003c\/p\u003e\n\u003cp\u003eThis is the larger 79mm piston, the Sherco Factory 2014\/15 300's use a 0.5mm smaller piston:\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSize A 78.95mm\u003cbr\u003e\u003c\/span\u003eSize B 78.96mm\u003cbr\u003eSize C 78.97mm\u003cbr\u003e\u003cspan\u003e18mm Gudgeon Pin by 56mm long\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCentre of the gudgeon pin to the top edge of the piston 28.8mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOverall height 66mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWeight including rings, gudgeon pin and C-clips 280 grams\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThese S3 piston are exactly the same as used in the GasGas, Scorpa and Sherco.\u003c\/p\u003e\n\u003cp\u003eThey are very slightly different to the original Beta piston but all the critical measurements are the same, they are both even made in the same factory (Vertex). The only differences are:\u003cbr\u003eThe Beta piston is 0.01mm bigger in diameter i.e. a size B Beta piston is the same as a size C S3 piston (78.97mm).\u003cbr\u003eThe Beta piston has a chamfer on all 4 corners of the bottom edge of the skirt.\u003cbr\u003eThe Beta piston has a small machined groove to help fit and remove the c-clips.\u003cbr\u003eThe anti friction coating has radius corners on the Beta, rather than square.\u003cbr\u003eThe skirt support lugs are little bit bigger on the Beta, so it's about 8 grams heavier then the S3 version.\u003c\/p\u003e\n\u003cp\u003eNone of the above will affect the way the bike runs so I'm more than happy to recommend this S3 piston for use in the Beta Evo 300.\u003c\/p\u003e","brand":"S3","offers":[{"title":"A","offer_id":44160082477236,"sku":null,"price":172.35,"currency_code":"GBP","in_stock":true},{"title":"B","offer_id":44160082510004,"sku":null,"price":172.35,"currency_code":"GBP","in_stock":true},{"title":"C","offer_id":44160082542772,"sku":null,"price":172.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-s3-racing-for-beta.avif?v=1773404688"},{"product_id":"s3-piston-rings-321cc-83-50mm-gasgas-321cc-only","title":"S3 Piston Rings 321cc 83.50mm GASGAS 321cc only","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e83.50 mm Piston Rings for old GASGAS 321cc ONLY.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160093913268,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-300cc-79-00-mm","title":"S3 Piston Rings 300cc 79.00 mm","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e79.00 x 1.2 mm Piston Rings for;\u003c\/p\u003e\n\u003cp\u003eBETA 300cc \/ SHERCO 300cc \/ GASGAS 300cc \/ VERTIGO 300cc \/ TRS 300cc\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160093978804,"sku":null,"price":33.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-76-00-mm","title":"S3 Piston Rings 76.00 mm","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e76.00mm Piston Rings for;\u003c\/p\u003e\n\u003cp\u003eBETA 270cc \/ SHERCO 290cc \/ GASGAS 280cc \/ VERTIGO 280cc \/ TRS 280cc\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094077108,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-270cc-74-00mm-gasgas-edition-only","title":"S3 Piston Rings 270cc 74.00mm GASGAS Edition Only.","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e74mm Piston Rings for GASGAS 270cc EDITION model ONLY.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094208180,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-250cc-72-50-mm","title":"S3 Piston Rings 250cc 72.50 mm","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e72.50mm Piston Rings for most 250cc models including GASGAS PRO, BETA, SHERCO, SCORPA, TRS, VERTIGO\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094240948,"sku":null,"price":33.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-200cc-71-00mm-gasgas-237cc-only","title":"S3 Piston Rings 200cc 71.00mm GASGAS 237cc only","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e71 mm Piston Rings for old GASGAS 237cc ONLY.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094306484,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-200cc-64-00mm-gasgas-200-only","title":"S3 Piston Rings 200cc 64.00mm GASGAS 200 only.","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e64mm Piston Rings for GASGAS 200cc ONLY.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094339252,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-125cc-56-00mm-gasgas-edition-only","title":"S3 Piston Rings 125cc 56.00mm GASGAS Edition Only.","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e56mm Piston Rings for GASGAS EDITION model ONLY.\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094372020,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"s3-piston-rings-125cc-54-00mm","title":"S3 Piston Rings 125cc 54.00mm","description":"\u003cp\u003eRings for S3 Trial Racing Pistons Long Life. Nitrurated steel.\u003c\/p\u003e\n\u003cp\u003e54mm Piston Rings for most 125cc models including GASGAS PRO, BETA, SHERCO, SCORPA,.\u003c\/p\u003e\n\u003cp\u003eNot for GASGAS EDITION model which has 56mm piston\u003c\/p\u003e","brand":"S3","offers":[{"title":"Default Title","offer_id":44160094437556,"sku":null,"price":30.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/piston-rings-trial-1.avif?v=1773408241"},{"product_id":"montesa-315-trial-piston-s3-racing","title":"Montesa 315 Trial – Piston S3 Racing","description":"\u003cp\u003e\u003cspan\u003eS3 replacement piston kit for the Montesa Cota 315R manufactured by Vertex.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eComes complete with Piston Rings, C-Clips \u0026amp; Gudgeon Pin.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eSize A - 72.175\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSize B - 72.185\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-content-type=\"heading\" data-appearance=\"default\" data-element=\"main\"\u003ePiston Sizes\u003c\/h4\u003e\n\u003cdiv data-content-type=\"text\" data-appearance=\"default\" data-element=\"main\"\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOriginal Piston Letter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOriginal Piston Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eRelated S3 Piston Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTo fit min Cylinder size\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eC\u003c\/td\u003e\n\u003ctd\u003e72.158 to 72.165mm\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e13103-NN3-000\u003c\/td\u003e\n\u003ctd\u003e72.200 to 72.208mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003ctd\u003e72.165 to 72.172mm\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e13102-NN3-000\u003c\/td\u003e\n\u003ctd\u003e72.208 to 72.215mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003e72.172 to 72.180mm\u003c\/td\u003e\n\u003ctd\u003eA - 72.175\u003c\/td\u003e\n\u003ctd\u003e13101-NN3-000\u003c\/td\u003e\n\u003ctd\u003e72.215 to 72.223mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003eB - 72.185\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e72.220 to 72.235mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv data-content-type=\"text\" data-appearance=\"default\" data-element=\"main\"\u003e\n\u003cp\u003e\u003cbr\u003eThe factory recommended piston to cylinder tolerance for the 250 is 0.035 to 0.050 mm, if you are considering putting the next size up piston in please be aware that your original piston will have worn down and any wear in the cylinder is unlikely to be uniform down the bore so please check the bore size all the way down the cylinder and from left to right as well as front to back. The piston is measured front to back and 15mm up from the bottom of the skirt, be aware that the pistons are manufacture tapered (larger at the bottom) and oval (larger front to back) to allow for unequal expansion of the piston in use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"S3","offers":[{"title":"A","offer_id":44160094699700,"sku":null,"price":265.55,"currency_code":"GBP","in_stock":true},{"title":"B","offer_id":44160094732468,"sku":null,"price":265.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/pi-315-a_1_1.jpg?v=1773408821"},{"product_id":"montesa-hrc-4rt-trial-pistons-s3-racing","title":"MONTESA-HRC 4RT Trial – Pistons S3 Racing","description":"\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cp\u003ePI-MON4-80 is 79.95mm for 280cc + 300cc 2016 to 2020\u003c\/p\u003e\n\u003cp\u003ePI-MON4-815 is 81.475mm for 301cc 2019 to current\u003c\/p\u003e\n\u003cp\u003ePI-MON-82 is 81.975mm for\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eS3 300cc cylinder only and not Montesa cylinder.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"description\"\u003e\n\u003cspan data-sheets-value='{\"1\":2,\"2\":\"Composition \u0026amp; treatment:\\n• Top quality Aluminium-Silicium alloy\\n• Casted or forged\\n• Molybdenum disulfide protective layer. \\n• Equiped with nitrided steel rings\\n\\nFeatures:\\n• Lightweight and resistant\\n• Limits the vibrations\\n• The engine will build up revs faster\\n\\nThe kit includes:\\n• 1 Piston\\n• 2 Rings\\n• 1 Pin\\n• 2 Snap clips\"}' data-sheets-userformat='{\"2\":8403951,\"3\":[null,0],\"4\":[null,2,13228792],\"5\":{\"1\":[{\"1\":2,\"2\":0,\"5\":[null,2,0]},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"6\":{\"1\":[{\"1\":2,\"2\":0,\"5\":[null,2,0]},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"8\":{\"1\":[{\"1\":2,\"2\":0,\"5\":[null,2,0]},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"9\":1,\"10\":1,\"11\":4,\"12\":0,\"14\":[null,2,0],\"15\":\"Calibri, sans-serif\",\"16\":11,\"26\":400}'\u003eComposition \u0026amp; treatment:\u003cbr\u003e• Top quality Aluminium-Silicium alloy\u003cbr\u003e• Casted or forged\u003cbr\u003e• Molybdenum disulfide protective layer.\u003cbr\u003e• Equiped with nitrided steel rings\u003c\/span\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFeatures:\u003cbr\u003e• Lightweight and resistant\u003cbr\u003e• Limits the vibrations\u003cbr\u003e• The engine will build up revs faster\u003c\/p\u003e\n\u003cp\u003eThe kit includes:\u003cbr\u003e• 1 Piston\u003cbr\u003e• 2 Rings\u003cbr\u003e• 1 Pin\u003cbr\u003e• 2 Snap clips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"S3","offers":[{"title":"280","offer_id":44160094994612,"sku":null,"price":246.39,"currency_code":"GBP","in_stock":true},{"title":"300","offer_id":44160095027380,"sku":null,"price":246.39,"currency_code":"GBP","in_stock":true},{"title":"300 S3","offer_id":44160095158452,"sku":null,"price":246.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9934\/6868\/files\/PI-CRF-80-21.avif?v=1773409117"}],"url":"https:\/\/camiomoto.co.uk\/collections\/cylinders-pistons.oembed","provider":"Camio Moto","version":"1.0","type":"link"}