Adjustable at back.

High quality plated bore and Omega quality piston kit together with genuine Rotax O rings and gasket.

This kit will only be sent AFTER we receive your 604 undamaged cleaned cylinder for exchange.  Please order in the normal way, then arrange to send us your 604 cylinder only first.  We should be able to despatch 640 kit on the same day your 604 cylinder is received. PLEASE ENSURE IT IS WELL PACKED TO AVOID DAMAGE.


Quick and easy to mount. Includes all fittings.
Quick and easy to mount. Includes all fittings.

Front brake caliper bracket to suit WP forks.  For use when swapping to Supermoto wheels using the 320mm brake disc.

Front brake caliper bracket to suit WP forks.  For use when swapping to Trail wheels using the 260mm brake disc.


These springs are suitable for Rotax header pipes and also the 644 link pipes.

A six-step maintenance system designed to clean any K&N Filtercharger® Air Filter. Restores air flow efficiency so your Filtercharger performs like new! Includes: .5 oz. Spray Oil & 12 oz. Filter Cleaner