sounds like you need a new crank.
I cut off the 1 inch shaft, left room to drill hole and tap with a 3/4 tap.
I have a grade 8 3/4 bolt I mounted into it but when I turn the crankshaft, it is very, slightly crooked when i turn it.
Any suggestions on how to get it straght after I already drilled and tapped?
What about set screws to use to keep new shaft bolt from loosenig, would it work?
Is there any reason this set up might not work? I drilled a 1/4 into the crankshaft that goes into the engine but not past where it rests on the bushing, should I be conserned with a balance problem?
Why not turn the shaft down to 3/4 ???
Here are pics. looking closelt at the measure stick, you can see after turning engine, slightly off one part of turn. I did not turn enough to see correctly, its about half of one of those notches.
Last edited by machinebike; 10-20-2009 at 07:43 AM.
What would be your next move, if the bolt was straight? What were you trying to accomplish?
I was doing this to use a 3/4 centr. clutch.
Next moves are to cut end of bolt off, drill and tap end and put groove in the bolt to hold clutch on.
Its not crooked by much but enough to make it spin with a slight wobble.
buy a new crank.
if you wanted it down to 3/4" the only real way to do it is to have the shaft turned down.
that does not look safe at all. there's no way in hell i'd get on a bike with something like that done to it.