I'm considering a mod' to the rocker bearing and to make it less awkwardly needs the pin and rocker arm removed, are these components compromised when disassembled, ie fit, or is it acceptable to use old pin.
Hi Roy, May I please ask: So, the aluBronze bushes are a press into the rocker bearing ? Then the pins have just enough play to rotate in the bush but no up or down and the rockers on the pins the same, just enough play but no up and down ?? As I understand it, the pin would normally be pressed into the rocker block/bearing whilst the rocker was in place, and the only slight play was between the rocker and the pin. So now there is play between the pin and rocker arm, and, the pin and the alubronze bush ? Is there a shoulder on the alubronze bushes to keep the rocker from drifting out and wearing into the port ? No concern regarding the expansion coef. between the two metals (alubronze bush and alum bearing) ?Vic, yes the the bushes are in the rockers. The way I figure it needle rollers are fine in rotating jobs, not in rocking motions as they will brinel in time. Back in the sixties every man and his dog put as many needle bearings as they could in their cafe racers. The results were not always good.