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L.A. SLEEVE Big Bore Kit 270cc - LAS-5377-1

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YAMAHA YZ250 TO 270cc BIG BORE KIT. Big Bore power for the stock cylinder and head. The added 20cc increases bottom-end torque and top-end horsepower, with a big hit from mid-throttle. BIG BORE KIT FEATURES:. -Big Bore Moly 2000 Cylinder Sleeve. -Forged Piston, rings, clips, pin, top end bearing and top-end gasket kit.

  • Part Number: LAS-5377-1
  • Manufacturer: L.A.SLEEVE
Note: Product images may only represent the class of product and not the specific model.
  • YAMAHA YZ250 TO 270cc BIG BORE KIT
  • Big Bore power for the stock cylinder and head.
  • The added 20cc increases bottom-end torque and top-end horsepower, with a big hit from mid-throttle.
  • BIG BORE KIT FEATURES:
  • -Big Bore Moly 2000 Cylinder Sleeve
  • -Forged Piston, rings, clips, pin, top end bearing and top-end gasket kit.
  • SPECIAL MACHINING REQUIREMENTS:
  • 1) Sleeve must be installed to cylinder by qualified machine shop.
  • 2) Ports must be blended and matched to cylinder.
  • 3) Head modification is required to accept big bore piston.
  • Power valves must be modified to accept big bore piston
  • SEND CYLINDER WITH POWER VALVES AND HEAD TO L.A. SLEEVE FOR COMPLETE INSTALLATION AND MODS. (Call for Pricing)
  • Compare price to a new cylinder. Add horsepower for about the same price.

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Yamaha YZ-250 - 2001, 2000, 1999

L.A.SLEEVE

L.A. Sleeve Co manufactures centrifugally spun-cast high performance cylinder sleeves and liners for all industries. Automotive, Heavy Duty, Industrial, Motorcycle, ATV, PWC, Snowmobile, Marine, Scooter, and High Performance racing to name a few. We are also not limited to these industries, we provide cylinder liners for original equipment manufacturing to single custom designed sleeves. We also offer various aftermarket solutions and products to expanding markets to give you the best advantage. L.A. Sleeve provides high quality and high performance Cylinder Kits, big bore or standard bore kits to give you the needed advantage along with carburator kits, MX/ATV EFI tuning, custom designed sleeves, motor installation to name a few of our product development and services provided.