Possu
Registered user
Hoping someone can shed some light on this:
My final drive bearing failed a week ago, took delivery on Friday of a used FD from a reputable source. Having cleaned the new FD up, I went to install it a short while ago, this is where it gets confusing.
I tapped the UJ on to the FD input shaft to locate the circlip as normal & tried inserting the front end of the FD in to the rear of the swingarm to connect UJ to shaft but it would not go? I've done this a couple of times without any issue (unless you count forgetting to first attach the gaiter to the FD..... ). No matter what I tried, I could not get the parts to slide together. I then levered the UJ off the FD & tried to insert the front of the FD in to the swingarm, it will not fit, as it's too big? I then tried again with the old FD & it slid straight in as it should do, no problem.
I've measured across the front of both FD's with a Vernier Caliper, right to left & at right angles to the Paralever bearings, both measure 108mm, measuring vertically gives a measurement of 88mm on both. I think the difference lays in the way the Paralever bearing bosses are machined or cast externally as I can now see a few scratches in the paint where it's catching.
The only other differences I can see relate to various numbers cast or stamped on to each FD.
Old FD has "N" stamped on the flat in front of one of the Paralever bearing housing whilst the new FD has "P" stamped above each housing.
Old F has "HB51" stamped to the rear of the left hand Paralever bearing housing, facing the disc whilst the new FD has "HB49" stamped.
On the inside of the Torque Arm lug, the old FD has 22, 0 & 00 cast in a series of circles whilst the new FD has 19, 6 & 01 cast in to it.
I can slide the old FD right in to the swingarm with ease & then rotate it about 10-15 degrees from upright either way. I can only slide the new FD in as far as the first part of the Paralever bearing inner conical race, just gets stuck after that.
Anyone else experienced anything like this? I've always thought all oilhead 11XX FD's were interchangable with the exception of the non-Paralever Cruisers?
Thanks in advance.
Steve
My final drive bearing failed a week ago, took delivery on Friday of a used FD from a reputable source. Having cleaned the new FD up, I went to install it a short while ago, this is where it gets confusing.
I tapped the UJ on to the FD input shaft to locate the circlip as normal & tried inserting the front end of the FD in to the rear of the swingarm to connect UJ to shaft but it would not go? I've done this a couple of times without any issue (unless you count forgetting to first attach the gaiter to the FD..... ). No matter what I tried, I could not get the parts to slide together. I then levered the UJ off the FD & tried to insert the front of the FD in to the swingarm, it will not fit, as it's too big? I then tried again with the old FD & it slid straight in as it should do, no problem.
I've measured across the front of both FD's with a Vernier Caliper, right to left & at right angles to the Paralever bearings, both measure 108mm, measuring vertically gives a measurement of 88mm on both. I think the difference lays in the way the Paralever bearing bosses are machined or cast externally as I can now see a few scratches in the paint where it's catching.
The only other differences I can see relate to various numbers cast or stamped on to each FD.
Old FD has "N" stamped on the flat in front of one of the Paralever bearing housing whilst the new FD has "P" stamped above each housing.
Old F has "HB51" stamped to the rear of the left hand Paralever bearing housing, facing the disc whilst the new FD has "HB49" stamped.
On the inside of the Torque Arm lug, the old FD has 22, 0 & 00 cast in a series of circles whilst the new FD has 19, 6 & 01 cast in to it.
I can slide the old FD right in to the swingarm with ease & then rotate it about 10-15 degrees from upright either way. I can only slide the new FD in as far as the first part of the Paralever bearing inner conical race, just gets stuck after that.
Anyone else experienced anything like this? I've always thought all oilhead 11XX FD's were interchangable with the exception of the non-Paralever Cruisers?
Thanks in advance.
Steve
