Namura Top-End Rebuild Kit for Polaris 570 Models - 99.94mm - NA-50019-4K MPN_FS101-0016 2021 Yamaha YZ250

2021 Yamaha YZ250

tapped 1/4-28 Bore - 3/4" Teeth - 12 Chain - #35 Pitch - 3/8"

2016 Suzuki RM-X450Z

Fitments 2000 Honda TRX400EX FourTrax

Part Number: PWRWC-H04-500

Namura Top-End Rebuild Kit for Polaris 570 Models - 99.94mm - NA-50019-4K MPN_FS101-0016 2021 Yamaha YZ250Namura Technologies Top End Rebuild Kit A Top End rebuild can help to improve the performance of your ride, keeping it running in peak condition. With the Namura complete Top End Rebuild Kit, rebuilding your Top End no longer expensive and painful Namura's Top End Kits include everything you need to get your ride operational again; pistons, a top end gasket kit and wrist pin bearings (where applicable) are all included in this convenient, time saving