Ensure the heart of your engine remains stable with the Naraku Heavy Duty Wrist Pin Bearing. Engineered for 50cc 2-stroke engines, this "small end" needle bearing features a reinforced silver-plated cage designed to withstand the extreme thermal stress and high rotational speeds of performance tuning. Whether you are performing a routine top-end refresh or installing a high-compression cylinder kit, this bearing provides the precision fit and reduced friction necessary to prevent catastrophic engine failure.
This bearing fits a massive variety of 50cc 2-Stroke models using a 12mm wrist pin:
Mechanic's Note: The wrist pin bearing is the most stressed bearing in a 2-stroke engine.
Safety Warning: Never reuse an old wrist pin bearing during a top-end rebuild.
Pro Tip: When installing, liberally coat the bearing in high-quality 2-Stroke Racing Oil to ensure immediate lubrication upon the first start-up. Check your Piston Circlips for tension while you're in there!
SKU: 137-73 Vendor: Naraku
