S3High Compression Cylinder Head Insert Red

ST-K-IN-416A S3 is the specialist in Trial and Enduro parts. Innovation and high quality are the key words guiding the design of the elements that will make a difference. Tested in all conditions, the S3 products are at the cutting edge of technology and equip the best riders and trial teams.



It uses the best alloys available, to obtain a better output & more traction. The advantage of these heads is that they can hold more water and have thicker walls which helps with the cooling rate, thus improving slightly low revs power.



It uses the best alloys available, to obtain a better output & more traction.
Forging them eliminates the hot spots found on casted heads.
Ensure a better cooling rate.


Standard compression inserts : Designed to provide optimum power and versatility. Improved performance in all areas and will benefit all levels of riders.



Advantages :



Designed to provide optimum performance
Makes for a more progressive motor
Very versatile for all riders and all terrains


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): Specially for altitudes over 1500m , or MX engine preparation.
Low compression: Incredible traction, smooth response, the best riders use it. It's a delight!