Hot Rods Connecting Rod Kit – 8621

This high-quality connecting rod kit is designed as a reliable replacement for heavy-duty applications. Manufactured from hot-rolled ASTM 4115 material, the rods are case-hardened to 58-62 Rc for exceptional durability. The advanced design features side scalloping and vent slots to minimize high-rpm bearing race distortion.

Double-forged for improved grain flow and dimensional consistency, the rods are shot-peened and double-honed to handle heavy loads. The small ends are double-drilled for enhanced lubrication and cooling to the wrist pin bearing, crucial in high-stress applications. Thrust washers and crank pin bearings are silver-coated for superior lubricity and performance.

Features:

• Complete kit includes rod, crank pin, crank pin bearing, top-end bearing, and thrust washers.


• Constructed from hot-rolled ASTM 4115 material, case-hardened to 58-62 Rc.


• Advanced design with side scalloping and vent slots for reduced high-rpm distortion.


• Double-forged for consistent dimensions and improved grain flow.


• Shot-peened and double-honed for enhanced strength under heavy loads.


• Double-drilled small ends for improved lubrication and cooling of the wrist pin bearing.


• Silver-coated thrust washers and crank pin bearings for increased lubricity.

Technical Specifications:

• Big End Bearing (mm): 34x42x20


• Big End Bore (mm): 42.00


• Big End Width (mm): 19.95


• Center to Center (mm): 103.50


• Pin Diameter (mm): 34.00


• Pin Length (mm): 60.80


• Small End Bearing (mm): Bushing


• Small End Bore (mm): 18.00

Cross-Reference OEM Part Numbers:

• YAMAHA: 5TA-11651-00-00


• YAMAHA: 5XD-11651-00-00

Vehicle Fitment:

• Yamaha WR450F: 2004–2006


• Yamaha YZ450F: 2003–2005

Part Number: 56-911.HR