I recently had to replace the throwout bearing (clutch release bearing) in my 52 3100. The bushing type u-joint was galled, probably let my oil level get too low. So I decided to replace it. I was surprised that I had no trouble sourcing a USA made throwout bearing from NAPA but none of the local parts houses could help me with the u-joint. I did a search to try and determine which internet supplier might carry the best product and this thread seemed to confirm my fears.
In the end, despite the negative opinions, I tried the same FS-101 kit with the needle bearings from the Filling Station. I had a different experience than Bicountry in that everything fit back in just like the bushing type I removed. No gaps and no misalignment. I don't see any way the needles can come out as someone speculated. I don't know if I will have trouble down the road but right now it seems all is well. I did spend a fair amount of time working my way from 220 grit all the way to 1000 grit on all the surfaces of the ball and torque tube that will see any movement in hopes of stopping the oil leakage and will keep my eye on that. Still not sure why Bicountry had the fitment issues with the u-joint but I am relieved I didn't.
