Ported CRF110 head w/ 54mm combustion chamber. This is not a stock crf110 size combustion chamber.
● This 54mm diameter head can be installed with 53, 53.5, 54 and even up to 56mm pistons.
27mm intake valve and 23mm exhaust valve. Combustion chamber has been deshrouded for better combustion. OEM valve seals are installed along with CJR titanium retainers and CJR heavy duty valve springs allowing over-rev without the worry of valve float. Valve guides have been ground down and smoothed.
These heads are ported when ordered so please allow addtl 3-5 days for shipment.