Big Bore Kits

Big Bore kits for all makes of the Honda 50, xr, crf, z, z50, xr50, and crf50. Also manual clutch kits, high volume oil pumps, and everything else needed to make your 50 faster!

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High volume oil pump XR50 CRF50 82-Present
$26.00
88cc Race Head Big Bore Kit for honda Z50, xr crf 70, xr50, and crf 50's
$409.99
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88cc stage 2 big bore kit for honda xr750 and crf 50
$269.99
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88cc stage 1 big bore kit for honda Z50, xr50 and crf50
$155.00
Honda xr crf 50 rev box
$25.00
High Volume Oil Pump - Vintage Honda 69-81 Z50
$32.00
Gasket Head 47mm 70cc
$10.00
Gasket Head 52mm 110cc-125cc
$10.00
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Left and right case gaskets for Honda 50
$16.00
108cc stroker kit 2 for honda 50's and 70's
$534.99
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88cc stage 2 big bore kit for honda xr70 and crf 70
$279.99
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Honda 50/70 High Performance Carburetor and Intake Kit
$105.00
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52mm 88cc 110cc 125cc Head gasket and clutch gasket kit for Chinese Lifan engines.
$18.00
Honda CT70 ATC70 Standard Bore 47mm Piston Kit
$45.99
Honda Z50 Performance Camshaft 1968-1981
$60.00
Piston Kit Standard Bore KTM 50
$29.99
54mm Head gasket kit
$16.00
Performance Intake
$32.00
CDI 5 Pin Green Rev Box
$25.00
88cc stage 1 big bore kit for honda for xr and crf 70
$155.00
47mm Head gasket and clutch gasket kit for Chinese Lifan engines.
$18.00
117cc stroker kit 6 for honda 50's and 70's
$569.00
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108cc stroker kit 1 for honda 50's and 70's
$279.99
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52mm Head gasket kit
$16.00
Head gaskets 47mm and 52mm for Lifan Engines,
$11.00
Gasket kit complete 52mm 110cc - 125cc
$15.00
Gasket kit Complete 47mm 70cc
$15.00
88cc stage 2 Vintage big bore kit for honda z50, ct70, atc70, trx70, sl70, xl70
$244.99
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88cc stage 1 Vintage big bore kit for honda z50, ct70, atc70, trx70, sl70, xl70
$155.00
88cc Race Head Vintage big bore kit for honda z50 and ct70
$409.99
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