Kit bottom end YAMAHA WR250F 03-13 Wiseco

Crankshaft Kit Includes:

crankshaft
piston roller cage
high quality main bearings
complete set of complete gasket that includes all the gaskets and gaskets needed to do the job
The crankshafts are factory-assembled and produced with precision according to OEM specifications
Double-forged Wiseco connecting rods maintain superior dimensional consistency due to improved grain flow
Shot peening eliminates residual tensions and gently mixes the forging surfaces of the rods
Corrosion resistant surface treatment
Rods with upper and lower stems, cemented to 58-62 RC to optimize the sliding surface of the bearing
The radial stroke clearance of the crank pin bearing is optimized to ensure maximum performance
Precision sanding guarantees an extremely round support surface
Precision lubrication grooves optimize bearing strength and durability
The small double-pointed ends provide extra grease and cooling to the plug, reducing distortion of the upper part due to thermal transfer from the piston
Bronze phosphor thrust washers with silver coating, dimple design to increase oil retention and reduce friction between rod and washer interface
The crank pin bearings are manufactured from the best quality hot rolled steel; cemented to 58-62 RC
Needle roller bearings with cage offer the maximum possible number of revolutions
Machined precision washers