CONNECTING ROD 99-21 YZ250, NAMURA RX-40015 YAMAHA MX

Namura Connecting Rod Rebuild Kit

This high-quality connecting rod rebuild kit is designed to replace worn or damaged connecting rods in select Yamaha and Fantic motorcycles. Manufactured from hot-rolled alloy steel and case-hardened for superior durability, this kit ensures reliable performance under demanding conditions.

Key Features:

• Constructed from hot-rolled alloy steel and case-hardened for increased strength and longevity.
• Advanced design incorporates strategically placed side scalloping and vent slots to minimize bearing race distortion at high RPMs.
• Rods are shot-peened and double-honed to enhance strength under heavy loads.
• Small end features double drilling for improved lubrication and cooling of the wrist pin bearing, crucial when piston crown proximity is a factor.
• Thrust washers and crank pin bearings are silver-coated to provide enhanced lubricity.
• Kits are sold complete and include the connecting rod, crank pin, crank pin bearing, top end bearing, and thrust washers.

Dimensions:

• Center to Center: 125mm
• Small End Bearing: 18x22x22mm
• Small End Bore Diameter: 22mm
• Small End Width: 20mm
• Big End Bearing: 24x31x16.8mm
• Big End Bore Diameter: 31mm
• Big End Width: 17mm
• Big End Pin Diameter: 24mm
• Big End Pin Length: 58.70mm
• Washer Thickness: 24x40x1mm