EK CHAINS 420 HEAVY DUTY GOLD 136L RACE CHAIN klx140g Next our manifold is port

Next our manifold is port matched for a smooth transition into the stock cylinder head

If you ride aggressively

and CRF/XR100 to eliminate the 9800 rpm rev limiter and provides a hotter advance curve

15t for more top speed and less bottom end power

Its a good idea to check and adjust your chain while doing this

EK CHAINS 420 HEAVY DUTY GOLD 136L RACE CHAIN klx140g Next our manifold is portAll EK Chains motocross chains utilize our CRH pin treatment which provides an extremely hard outside coating and softer inside to increase strength and reduce chain wear. Exclusive to EK Chains, the Chormium Carbide pin surface coating also offers superior impact and shock absorption while reducing oxidation caused by natural elements. The 420SH also features lightening holes in the side plates to reduce the chain's overall weight by 3% without