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as the factory CDI’s cut the power off way too early to build optimal power
Most front arms for the YFZ450R & YFZ450X will work on either model but stock replacements are specific to the original model
5mm Clutch Requires 107mm Bell109mm Clutch can be used in OEM Stock Bell (Apex - DRR)Delta Clutch is Adjustable - Perfect for the Serious Racer Fly Clutch is Non Adjustable - Stock to Mid-Race LevelsShoe Springs: Red = Race
will not wear down like the aluminum ones and are higher quality then competitors mild steel ones
Front pulley Malossi 16mm TRX 450R as the factory CDI’s cutThe fixed half of the Vario is located at the end of the crank near the kickstart mechanism. Its larger fins will cool the transmission more efficiently. The angle of the disc is designed for the MALOSSI variator, but it may also be used as a spare part for the original variator. Very robust construction. Package includes a locking washer.