Quick Adjust cam arms for Yamaha snowmobiles.
We now offer our Patented Quick adjust weights for Yamaha applications. This method of adjustment allows for adding or subtracting mass from the main body of the flyweight without even removing the flyweight from the clutch. Makes for Quick and easy testing and tuning. This series of Quick Adjust uses our “DPYR” series curvature that has been very popular on the 4-stroke models. With Yamaha models it is important to know that the necessary “grams” needed for an application can vary widely because of the variety of flyweights and curvatures on the market.
Example: The QAY -62 is often used at 64-68 grams on normally aspirated Apex Reverse applications (based on chosen springs and helixes).
Note 1: Viper / Nitro. This one often for bigger tracks or mixed with some elevation.
Note 2: Popular with Nitro / Viper / Vector 3 cylinder stock models.
Note 3: Often in RX-1 applications and some stock Apex application depending on other chosen components.
Note 4: Common with Apex applications.
Note 5: Some Yamacharger / Apex applications. Also some stock Sidewinders with some clutch recipes, and often with Sidewinder with free flowing exhaust or extra HP.
Note 6: Often for boosted 180 HP Viper kits. Popular on lower version "trail" (re-programmed Sidewinders with extra boost). More often used for 230-260 HP. Check with your programming company for specifics of the tune.
Note 7: This set is now most often used with 250-290 level boosted / re-programmed Sidewinder models. It was also common with older low boost Apex / RX turbo applications.
Note 8: Most common for many boosted RX / Apex applications.
Note 9: A new heavier base weight for higher boost applications.