188cc Ultimate Big Bore Stroker Kit - 31/25 Big Valve Head - All KLX140

This kit comes complete with:

– 63mm Ceramic Forged Cylinder
– 63mm Forged Piston w/ Wrist Pin, Rings and Clips
– All Gaskets needed including clutch and ignition covers
– Stage 3 camshaft with roller rocker arm design!
– Cylinder Head with Big Valve 31-25mm CNC ported
– +6mm Stroker crank
– Racing Carb (28mm) and Jet Kit with mains and pilot jets
– Throttle cable and throttle
–  Stage 3 CDI
–  HD Clutch springs
–  Intake Manifold and Boot to airbox

New roller rocker for the custom camshaft to increase bottom-end response, the rocker arms are specially designed for the cam in this package. We have also customize the cylinder head to fit with the new rocker arm.

This cylinder head is already ported and has been customized for 63mm piston size

We strongly suggest an aftermarket exhaust with any big bore kit.

We also have performance CDI's to increase rpm limiter, bigger carburetors, high compression piston kit, racing exhaust, custom crankshaft, etc.