Our Honda CRF132cc 4v kit is is in stock and ready to ship!

This kit so far has proved extremely powerful with very impressive low end throttle response and power that carries out strong through the entire RPM range.
This 4v head kit will come complete with the following -

4v Cylinder Head

Custom Port/Polished Intake and Exhaust
Includes Modified Valve Cover (Required to clear 4v rocker arms and valve springs)

High Lift 55mm Dome 4v Camshaft (rings/circlips/piston pin)
Custom ported 4v Intake Manifold + 31mm Throttle Body with machined intake lip to 39mm to allow use of current aftermarket intakes

Includes modified manifold nipple for map sensor fitting

Insulator Port Matched
Gasket Set
130cc Injector (must re-use OEM red o-ring spacer)
Utilizes OEM Fuel Rail with 3D Printed Injector Adapter (Requires cutting one fang off OEM adapter)

Requires TB Parts, BBR, OR CJR CNC 55mm cylinder.

Requires aRacer standalone ECU with autotune or custom dyno tune, ECU flashes not available at this time.
Requires custom intake as the OEM airbox will not work. On our builds we used a 38mm/1.5" 180 degree bend silicone hose attached to a pod filter via a 1.5" coupler.
Recommended parts - large exhaust system such as rocket big bore, yoshimura or bbr. Secondary crankcase breather (steady garage oil cap vent), Avail Motorsports oil pump sprocket, CJR cam chain guide, HD Clutch Spring or 4D Clutch Kit, High Flow Oil Pump.

NOTE - THIS IS AN AFTERMARKET PERFORMANCE PART BUILT FOR RACING PURPOSES ONLY. CJR IS NOT RESPONSIBLE FOR ANY DAMAGES CAUSED TO THE PARTS, VEHICLE, OR TO YOURSELF AND OTHERS. ENGINE PARTS ARE NOT UNDER WARRANTY NOR IS COLLATERAL DAMAGE OR COST OF LABOR, IN CASES OF MALFUNCTION.
AFTER AN ORDER HAS BEEN FULFILLED TO THE CUSTOMERS ADDRESS, IN THE EVENT OF A RETURN - A RETURN RESTOCK FEE OF 25% WILL BE ISSUED FOR ANY RETURNED KITS.

Piston Kits / Big Bore Kits