RP Tappet noise

[Ian Williams]

Both are very important Graham, if you have more than 3 thou end float the cam will kick back an forth making all sorts of clatter, it will wear the front bush quickly and eventually cause an oil leak around the locating pin. Others may have differing opinion about lash but I find 4 to 5 thou about right, its important when mixing and matching gears that you stone off high points or you will point load the teeth which in bad cases will cause fast wear and inevitable chipping of the gear.