S3 Stars Cylinder Head GAS GAS TXT250/280/300 ‘inserts only’ – for NEW type Horizontal Outer Head ST-1060

These inserts are ONLY compatible with the new type horizontal outer head (part number ST-1060-R).

See photo below of the new type horizontal head that only these inserts fit.

If 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.