How To
Rotax Muffler Matting
The Rotax Grand Finals are on, and all the new karts and engines will have new exhausts with fresh matting. But as you start clocking up the hours on the Rotax MAX, there is some maintenance that needs to be done on the exhaust to keep it quiet and retain performance – replacing the internal …
How-To Tech: Rotax Power Valve Plumbing
The 125cc Rotax MAX EVO engine uses an Electronic Timed Exhaust Valve System. With opening and closing triggered by the engine’s ECU, crankcase pressure is used to open the valve (for top end performance) and the spring external to the exhaust valve closes it (for bottom-end performance). It is therefore important the various tubes are …
