Some owners of Ski-Doo sleds with the new 800R E-TEC engine package complained about engine misfiring. It is very important for owners of the 800R E-TEC engine package to understand the proper operating RPM of this engine package is 7900-8000, not 8150 RPM like on the PowerTEK version of the 800R.
That means you need to make sure your 800R E-TEC is not revving above 8000 RPM. If it does, the engine management system will engage and the engine will misfire and hesitate. Typically, if you see the tachometer going above 8000 RPM all you need to do is lower the setting of the clickers on the TRA primary clutch.
It is important to understand that the 800R E-TEC will not rev much over 8000 RPM, no matter how high you turn the clickers. To adjust for maximum performance, start at a low clicker position, note the RPM and work up to 7900 RPM, but keep it below 8000. Always start on a low number causing the engine to run below its peak, then work up to the target RPM.
Regardless of whether the 800R is an MX Z, Renegade or Summit model, you have to be sure to have the clutches calibrated for the proper elevation. This engine will not allow itself to rev above 8000 RPM, and is the main cause of misfiring and hesitation complaints from users in the field. If you should experience any hesitation at ANY altitude, it is important to check for proper clutch calibration or adjust the TRA to keep the engine operating below 8000 RPM. On Summit 800R E-TEC models used at elevations lower than 4000 feet, you MUST install a 100-260 TRA drive clutch spring to keep the engine RPMs down below 8000 as the engine makes more power at lower elevations. The part number for this spring is 414 742 200.