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.It is not standard camshaft.Changing the large angle camshaft can increase the time of air inlet, change the engine performance, the power of the compression explosion increases greatly, and the horsepower and torque increase are significantly increased!The camshaft is one of the key components of the engine. The hardness of the cam tip and the depth of the white layer are key technical indicators that determine the service life of the camshaft and the efficiency of the engine.The large angle camshaft can extend the valve opening time, increase the valve lift, and make the intake and exhaust valves open early and late, allowing more air to enter the cylinder to improve the engine's medium and high speed power and output.It can enhance 20% Output Power.

.Compatible for HONDA:SL230 1997~2008
XR230 2003~2008
CRF230F 2003-2019
.100% Brand New & High Quality.
.High-quality cost effective replacement for OEM parts.
.Direct replacement to your original unit.
.Pic shown is of exact item you will receive.
.Directly Install
.Bore diameter :67MM
Package Includes:
.1* Big Bore cylinder block

.1* Upgrade Camshaft

.1* Modified Roller Silent Rocker Arm

.1* piston kit
.1* ring kit
.1* gasket kit
.2* valve oil seal
.Installation Instruction NOT Included

.Important Notes: If you have any questions,Please feel free to contact us.