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Big Bore KitsThere are 32 products.

• 

  1979-81 z50 Vintage High Volume...

    Deliveres 3 times the amount of oil over stock pump

  $32.00
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  82-Present High Volume Oil Pump

    Delivers 3 times the amount of oil over stock pump.

  $26.00
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  Honda XR CRF 50 Rev Box

    50 Caliber Rev Box. This rev box will remove the stock rev limiter and allow your pit bike to max out its performance and rpm's. Improved timing curve. Great bang for the buck! Fits all years of Honda xr50 and crf50

  $25.00
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• 

  XR CRF High Volume Oil Pump

    Fits all years of xr and crf, Delivers 3 times the amount of oil over stock pump.

  $26.00
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• 

  88cc Race Head Big Bore Kit for...

    88cc Race head kit for Your Honda 50 or Honda 70. This kit will drastically improve your overall performance on your bike. A stock honda 50 puts around 2.2hp to the ground and this kit will put you between 5.5-6hp to the ground and 30% more to the crank! Kit comes with fully assembled race head, performance cam, 20mm carburetor, and all the...

  $349.00
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  108cc Stroker Kit 1 for Honda...

    Stroker Kit 1 Ready for more power? Convert your 88cc Race Head kit into a 108cc stroked out beast!! (Much more powerful than any of the chinese engines up to 125cc)

  $229.99
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  108cc Stroker Kit 2 for Honda...

    Complete 108cc Stroker kit for Honda crf and xr 50 and 70cc engines 1988 to current. Kit includes piston, race head, cylinder, cam, carburetor, throttle cable, gaskets, intake, crank, and filter.

  $499.00
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  52mm Head Gasket Kit

    52mm (88cc -108cc) and 54mm (117cc) Head gasket kit

  $12.00
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• 

  Left and Right Case Gaskets for...

    Left and right case gaskets for Honda 50, also fits all 50-125cc honda clone chinese engines.

  $12.00
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• 

  47mm Head Gasket and Clutch...

  47mm 70cc Head gasket and clutch gasket kit for Honda 50 and Chinese Lifan motor.

  $18.00
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