Re: Wristpin Bearing Upgrade? Dax
Have you found that the wrist pin hole is off set in the rod?! Mine is by a few thousands I made a jig so if I replace it I can get it back in almost the same spot. Notice I said almost. The wrist pin has no up and down play. Its still has no slop in the hole but if you take the pin, and push it to one side and wiggle it it will rock about 0.015. This is loose to me but I can't see any wear marks so this must of been that way from the factory as I don't have that many miles on it( mileage unknown) The piston and cylinder still look very good tiny bit of wear on the skirt at the bottom in one little spot. No blow by visible on the piston.
What type of bearing material is your wrist pin bushing made out of. I looked at your site and it says brass. Is it an alloy?
I have taken this booger all apart except for the crank as I would destroy the roller bearing getting them off to split the crank. I can see there is needle bearing on the big end so I don't think I'll mess with it and this crank has no bolt on weights its a 3 piece not counting the main shafts 2 flywheels and a main pin all pressed together best I can tell.
One thing I did find and I don't recommend anyone doing this and that is don't take the clutch pads housing off of the inner drive part its pressed together. When I pressed it apart 10,000 little renegade balls took off to the four corners of the earth and a few even acted like Curly from the three stooges. I had a long Easter egg hunt to find all of them something like 56 or so. What a time I had with that .
I'm really thinking about just putting it back together and running it cause as sure as I change that bushing my edge on Bob's bike will go away. So what do all you guys think I could show how to do the bushing but not actually do it. But what fun would that be, then again if I do I might mess it up and have a ho humm engine. I'm going to look and see what kind of bushings I can find here or stock that I can roll my own out of. that to me is the fun part.
Norman
Last edited by Norman : 02-27-2008 at 10:51 AM.
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