jimr
Member
After I discovered that I was not the only one with problems with the Sierra kit bushings I tried a few more measurements. I am pretty convinced that the problem concerns the wall thickness of the bushings. I mic'd as accurately as I could and found that the wall thickness varies from .0065 to .0071 from one side of the bushing to the other and I think that I can tell by just looking that they are not the same. That is how I determined where to measure. Now, I am not a machinist and these measurements are certainly not to extreme tolerances but if there is that much difference there is not much that can be retro-fitted to make them rotate smoothly. I also do not know how bushings are manufactured, machined on a mandrel or drilled from solid stock but however it is done, the process is faulty.
I hope someone will either confirm or dispute my findings.
I hope someone will either confirm or dispute my findings.