These inserts are ONLY compatible with the new type horizontal outer head (part number ST-1060-R).
SEE PHOTO 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.
STAR HEAD Inserts: Forged in the best aluminum alloy to obtain a top quality component and high durability. Its new design has thicker walls and higher water flow to ensure a better cooling rate. New design:
• Forging them eliminates the hot spots found on casted heads. Specific design of the compression inlets, gives options to adapt engine setting to YOUR CHOICE, you will feel real difference between different compression options ( low comp. inlet available as accessory) Different compression Inlet, what changes?
• Standard compression (STD): Higher torque and power at low revs. Even though it is similar to the original compression, you will notice the difference.
•High compression (A): Possibility to add another gear, better traction and very clean response.
•Very high compression ( AA y AAA): Especially for altitudes over 1500m , or MX engine preparation.
• Low compression: Incredible traction, smooth response, ideal for X-treme, TOP pilots use it. It’s a delight!
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