OEM Shift Star - 02-09 KLX110 - 13145-1081 YX160 but will not affect starting

but will not affect starting with stock bore or 143 bore kits

more durable option and are built to exceed O

Note:  This kit should be installed by a professional mechanic or shop that offers valve job service as the valve seats must be cut to accept the larger valve head diameters and valves sunk deeper to allow for overlap clearances

then serious trouble can be the result

OEM Shift Star - 02-09 KLX110 - 13145-1081 YX160 but will not affect startingOEM Shift Star KLX110 13145 1081 This is the stronger updated version. To be used with the OEM 4up shift drum. Commonly used when swapping the L model to the standard 4up pattern to avoid the infamous klx110L mis shift.