tightwoods
LIFETIME SPONSOR
- Nov 23, 2000
- 87
- 0
I am considering installing Kibblewhite valves/spring kits in an '03 YZ250F and '05 CRF450. Can good performance be achieved by simply lapping the valves into the existing valve seats or do the seats need to be recut (Serdi) for optimum performance? I don't know the condition of the seats yet since the top ends have not been disassembled. How critical is it to maintain Kibblewhite's specs for Installed Height, Seat Pressure, Open Pressure at ?" Lift, Max. Lift? How do you measure Seat Pressure and Open Pressure, with a special force gauge? Thanks.
tightwoods
tightwoods