Wiseco 12.5:1 Big Bore Kit

• Product Details

  Wiseco offers big bore kits for many applications to bring you the most power possible. Their kits include brand new cylinders.

  • Dedicated forging for light weight, superior strength, optimized design.
  • High compression for maximum torque and throttle response.
  • Dome design gives improved flame travel to maximize air / fuel burn efficiency.
  • Chrome plated piston pin for reduced friction, improved scuff resistance.
  • Horizontal slot pin oiling provides improved lubrication, better pin oiling, reduced friction.
  • Pressure seal groove allows for maximum ring seal.
  • Skirt coated for reduced friction, quieter operation, improved scuff resistance.
  • Dedicated rings are optimized for each application, light weight, high performance, better oil control.
  • Bolt-on cylinder - no case machining necessary.
  • Kits include: big bore piston (rings, pin, clips), cylinder, and complete top end gasket kit.

  Detailed Specifications:

  • Displacement: 435cc.
  • Bore - standard: 85.00 mm.
  • Bore - actual: 89.00 mm.
  • Bore - oversize: 4.00 mm.
  • Stroke: 70.00 mm.
  • Cylinders: 1.
  • Compression Ratio - actual: 12.5:1.
  • Detailed item contents:
  • 3052FA - Sleeve Honda XR / TRX400EX 96-04 / 99-08.
  • 4794M08900 - Honda XR / TRX400EX / TRX400X 12.5:1 CR.
  • 8900XX - 89.00 mm ring set.
  • CW20 - Round wire pin locks 20 mm (pair).
  • S553 - pin 20 mm x 2.185" - chrome plated.
  • W5942 - Gasket kit XR / TRX400 96-05 / 99-08 87 - 89 mm.
  • Additional Information: Includes sleeve.
  • Note: Cylinder sleeving required.

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