Yea ,but the threaded hole to mount the rotor would be OOT alsoDidn't someone mention a sleeve that could be pressed on after turning the seal run surface true?
If the engine is assembled, than the tight/slack is from the cam thrust against the lifter/valve spring. This would happen four times in two crank revolutions.
chain goes slack-tight-slack with one rotation of the camshaft
What is the max runout on the seal area of a camshaft? I measure .005"
What cam is it?
A re-welded cam?
pop off the rocker covers and see which (cam) valve event is happening when the slack tight event happens
is the runout on the same spot on the cam every time you rotate it?
What cam is it? A re-welded cam?
I already have the head off, but the point of maximum run out aligns, more or less, with the right inlet cam lobe which is the one furthest from the bearings, so it would be the prime suspect. Having said that the cam and followers look to be in good shape with no signs of friction heating or scuffing. The cam turns freely, but the dial gauge shows no clearance in the bearing. I'm surprised there can be zero clearance in the bearing and 0.010" run out where the sprocket is seated, maybe when I split the cases I'll find the crescent shaped wear pattern.
Yes
It's most likely the original cam since the bike has just 20k miles on it and the license plate shows tabs from 1995.
bearings are on both ends?with the right inlet cam lobe which is the one furthest from the bearings
bearings are on both ends?
RH/LH is normally in respect to the driver sitting on the bike
timing side is RH
drive side is LH