Yamaha Banshee 350 YFZ350 Big Bore Forged Piston Kit 5.50mm Over 69.5mm Compatible with 1987-2006 347cc Liquid-Cooled Twin-Cylinder 2-Stroke 34HP ATV 2GU116360000

YAMAHA BANSHEE 350 YFZ350 — ALL YEARS (1987-2006):
• Yamaha Banshee 350 YFZ350 347cc Liquid-Cooled Twin-Cyl 2-Stroke Reed Valve 34HP (1987-1991)
• Yamaha Banshee 350 YFZ350 347cc Liquid-Cooled Twin-Cyl 2-Stroke Reed Valve 34HP (1992-1998)
• Yamaha Banshee 350 YFZ350 347cc Liquid-Cooled Twin-Cyl 2-Stroke Reed Valve 34HP (1999-2006)

OEM PART NUMBERS:
• Yamaha: 2GU-11636-00-00 / 2GU116360000

KIT CONTENTS (Single Cylinder):
• (1) Forged Piston — 5.50mm BIG BORE Oversize 69.5mm
• (1) Ring Set / (1) Wrist Pin / (2) Circlips
• Forged with MOS2 Skirt Coating — Made in Italy
• Twin-cylinder engine — order (2) kits for complete rebuild

ENGINE SPECIFICATIONS:
• Engine: Yamaha 347cc Liquid-Cooled Twin-Cylinder 2-Stroke Reed Valve
• Standard Bore: 64mm / Stroke: 54mm / Compression: 6.5:1
• Carburetor: Dual Mikuni VM26SS / Cooling: Liquid-Cooled

Big Bore Piston Kit — 69.5mm / Yamaha Banshee 350:
5.50mm maximum big bore forged piston kit for Yamaha Banshee 350 YFZ350 performance builds. Requires aftermarket big bore cylinder sleeves. Standard bore is 64mm — this is NOT a standard oversize kit. Weight: 2 lbs.

⚠️ IMPORTANT: Verify OEM part number and bore size before ordering to ensure proper fitment.