S3 is the specialist in trial and enduro parts. Innovation and high quality are the key principles guiding the design of the elements that will make a difference. Tested in all conditions, S3 products are at the forefront of technology and equip the best riders and trial teams.

The specific design of the different compression inserts allows you to adapt the engine behaviour to your riding style! You will really feel a change between the different inserts.

The insert includes a short NGK BPMR6A spark plug and O-rings.
Lowers the engine operating temperature.
Eliminates hot spots from the original cylinder head.
Provides more traction and a sharper engine response.
Standard compression insert: Improved standard compression with an interior design that optimizes the engine explosion, it was designed to increase efficiency. Gas evacuation is facilitated, making the engine more balanced.

Benefits:

Improved interior design for gas flow.
More balanced engine with more torque than the original.
Increases the engine's progressiveness.
More versatility to better adapt to different types of riding and terrains.
What changes?

Standard compression (STD): More torque and more power at low revs, although the compression is similar to the original, you will notice the difference!
High compression (A): More grip, precise engine response, the bike remains very easy to control.

Very high compression (AA and AAA): Ideal for riding at over 1500 metres altitude, or specific engine preparation.
Low compression: Phenomenal grip, smooth response, used by the best riders. A delight!