Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)
my poor bike
jBernard:
d**n that would have been nice to know :|
LundMx:
it makes me want to gusset mine now to make sure it does not happen to me! :?
sandblaster:
It makes me think that we need to prevent the engine from rotating counter clockwise using the pivot pin as the rotation center.
Any word on if the Service bikes are having this problem?
If not, what are they doing different?
don46:
I looked at the pictures again, and I think both were showing signs of failure, one not nearly as bad as the other. Like I said before, this is a 250, maybe there are different harmonics involved than you'd see with a 500. I recently looked at the AL framed 250 I built, didn't see any signs of immenent failure, although I'm sure the original poster felt the same.
brooksie:
This is very worrying. It's seems I've just built a very expensive garage ornament! I'm getting rather afraid of using the thing now. Are the frame rails JFab supplies radiused or square?
Talking of JFab, he makes a superb head steady. I think it would be far easier to have a similar bracket made for the front which picks up on the cylinder head studs. Then just a boss welded to the down tube and job done.
No guarantee, but surely a help.
Just another thought. The rails I removed from my frame were square. No radius whatsoever. Obviously Kawasaki thought the square tube was up to the job. Therefore it's something that is being introduced during the conversion. My suspicion is the lack of heat treating. There's a few frames that have let go now in more or less the same place which appear to be due to fatigue. Until somebody can supply a definitive material/heat treatment process, failures are going to continue.
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