CRANKSHAFT BOTTOM KIT 05-20 YZ125, WISECO WPC163 YAMAHA MX

YAMAHA
YZ125 2005 - 2020,

Wiseco Crankshaft w/Bearings and Gaskets - WPC163,

ӢPrecision-trued to OEM specifications and factory assembled
ӢShot-peening eliminates residual stresses and smoothly blends the rod forging surfaces
ӢCorrosion-resistant surface treatment
ӢCrank pin bearing radial running clearance is optimized to ensure maximum performance
ӢPrecision honing ensures ultra-round bearing surface
ӢPrecision-engineered oiling slots maximize rod strength and bearing life
ӢDouble-drilled small ends provide the piston pin with extra lubrication and cooling, reducing distortion of top end due to thermal transfer from the piston
ӢSilver-coated bronze phosphor thrust washers with dimpled design increase oil retention and reduce friction between rod and washer interface
ӢCrank pin bearings are manufactured with the highest-quality hot-rolled steel -- case hardened to 58-62 RC
ӢCaged needle roller bearings provide the highest possible RPM
ӢPrecision-machined crank webs
ӢCrankshaft comes with top-end bearing and gasket

Included Items:

(1) Crankshaft with connecting rod installed

(2) 22 x 56 x 16mm Bearings

(1) Bottom End gasket set with 10 seals

Part No. 56-240.WI (oro2u.com)

Yamaha

• 2018 Yamaha YZ125
• 2017 Yamaha YZ125
• 2016 Yamaha YZ125
• 2015 Yamaha YZ125
• 2014 Yamaha YZ125
• 2013 Yamaha YZ125
• 2012 Yamaha YZ125
• 2011 Yamaha YZ125
• 2010 Yamaha YZ125
• 2009 Yamaha YZ125
• 2008 Yamaha YZ125
• 2007 Yamaha YZ125
• 2006 Yamaha YZ125
• 2005 Yamaha YZ125

Precision-trued to OEM specifications and factory assembled Connecting rods are double-forged to maintain superior dimensional consistency through improved grain flow Shot-peening eliminates residual stresses and smoothly blends the rod forging surfaces Corrosion-resistant surface treatment Top and bottom end rod bores case hardened to 58-62 RC to optimize bearing running surface Crank pin bearing radial running clearance is optimized to ensure maximum performance Precision honing ensures ultra-round bearing surface Precision-engineered oiling slots maximize rod strength and bearing life Double-drilled small ends provide the piston pin with extra lubrication and cooling, reducing distortion of top end due to thermal transfer from the piston Silver-coated bronze phosphor thrust washers with dimpled design increase oil retention and reduce friction between rod and washer interface Crank pin bearings are manufactured with the highest-quality hot-rolled steel -- case hardened to 58-62 RC