OEM Grade 5mm Long Rod Piston Ring Set 1.00mm Over Compatible with 1987-2006 Yamaha Banshee 350 YFZ350 347cc 2-Stroke Twin Cylinder ATV 65.00mm 2GU-11631-00-94

5mm Long Rod Piston Ring Set - 65.00mm (1.00mm Over) Compatible with Yamaha Banshee 350 ATV
Aftermarket piston ring set for the Yamaha Banshee 350 5mm long rod stroker engine build. Bored 1.00mm over standard 64.00mm bore for a total diameter of 65.00mm. Designed for use with WSM 5mm long rod stroker pistons where the piston pin is 5mm higher to accommodate the longer connecting rod. Fits the 347cc liquid-cooled 2-stroke reed-valve twin-cylinder engine with 64mm x 54mm bore and stroke and 6.5:1 compression ratio. This engine powers the Yamaha YFZ350 Banshee produced from 1987-2006 including Limited Edition, Special Edition, and 50th Anniversary models. Dual Mikuni 26mm carburetors. Kick start only. Includes compression ring and expander ring for one cylinder.

OEM PART NUMBERS:
• 2GU-11631-00-94 (Piston Ring Set)
• 2GU-11636-00-00 (Alternate Reference)

SPECIFICATIONS:
• Bore Size: 65.00mm (1.00mm Over)
• Standard Bore: 64.00mm
• Stroke: 54.0mm
• Displacement: 347cc (2 x 173.5cc)
• Engine Type: Liquid-Cooled 2-Stroke Reed Valve Twin Cylinder
• Compression Ratio: 6.5:1
• Ring Type: 5mm Long Rod Stroker
• Product Type: Piston Ring Set (per cylinder)

APPLICATIONS:
• YFZ350 Banshee (1987-2006)
• YFZ350LE Banshee Limited Edition (2003-2005)
• YFZ350SE Banshee Special Edition (2005-2006)
• YFZ350SP Banshee 50th Anniversary (2006)

⚠️ For 5mm long rod stroker builds only — pin height is 5mm higher than standard.
⚠️ Twin-cylinder engine — order 2 ring sets per complete rebuild.
⚠️ Verify OEM part number from your original unit before ordering.