Wiseco Forged Series Piston Kit with Gaskets - Yamaha YFM80 Raptor/Badger/Grizzly (1994-2008) - 50.00mm Bore (+3.00mm Big Bore) - 4-Stroke
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Wiseco Forged Series Piston Kit with Gaskets - Yamaha YFM80 - +3.00mm Big Bore
Premium Wiseco Forged Series piston kit for Yamaha YFM80 youth ATV platform. +3.00mm BIG BORE (50.00mm) increases displacement to 90cc!
⚠️ Big Bore Kit - Cylinder Boring Required
This piston is +3.00mm oversize. Cylinder boring to 50.00mm is required for proper fit.
Kit Includes
- Forged Series Piston
- Ring Set
- Wrist Pin
- Wrist Pin Retainer Set
- Complete Gasket Kit
Piston Specifications
- Bore Size: 50.00 mm (+3.00mm Big Bore)
- Piston Diameter: 49.95 mm
- Stroke Length: 45.60 mm
- Compression Ratio: 11.0:1
- Material: 4032 Aluminum Alloy
- Skirt Coating: Non-Coated
Engine Specifications
- Displacement: 90cc (increased from 80cc)
- Engine Type: 4-Stroke
- Weight: 0.8 lbs
Fitment
- Yamaha YFM80W Raptor: 2002-2008
- Yamaha YFM80 Grizzly: 2005
- Yamaha YFM80 Badger: 1994-2001
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
