Top End Piston Kit 11:1 Compression - 39.00mm Bore (STD)

• Bore - Actual: 39.00mm
• Bore - Oversize: STD
• Compression Ratio - Actual: 11:1
• Displacement: 49.5cc
• Stroke: 41.40mm
• Type: Piston Kit
• UPC: 193564154569

Includes The Following Components
• 3900XZ - 39.00 mm Ring Set .8 X .8 X 2.0mm
• 4798M03900 - Honda XR50 '88-03 CRF50F '04-13 3900XZ
• CW13 - 13mm Round Wire Locks - Set of Two
• Ring - Set
• S671 - PistonPin 13 x 29.75mm NonChromed TW
• W6159 - TopEnd Gasket Kit Honda 50cc '82-13 39mm

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• Top End kit includes: piston, rings, wrist pin, clips, top end bearing (2 strokes), and gasket kit
• Each piston is built from race proven designs that are chosen by the top race teams in all forms of racing including Supercross, Motocross, GNCC, Superbike, and more
• Dedicated forgings used for superior strength to weight ratio utilizing aerospace alloy
• High Performance ring kit and alloy pin included with each piston kit for extended life and sustained power

Wiseco's complete top end Piston Kits are offered for nearly every popular motorcycle application. These kits contain everything you need to complete your rebuild the right way, the first time. High quality parts specifically chosen by us to match our forged pistons are included in this kit for easy one stop shopping.