Fxr swing arm
Side observation: I'm a little amazed that the plugs that fill the access holes on those stay in place, given how relatively little effort is needed to take them out.
Got it. I was curious if it mattered which way was up. The service manual had a picture with the pins on top, so that's the way I reinstalled them. The bike is back together.Overall, id say that was not a bad job. I had to replace the base gaskets last week. That was far worse.
anyway, I took a short ride, and it seems better. There's a bit more vibration, but not bad. It no longer streers when I use the rear brake, so that's nice. Thanks for the help!
anyway, I took a short ride, and it seems better. There's a bit more vibration, but not bad. It no longer streers when I use the rear brake, so that's nice. Thanks for the help!
Thread Starter
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Stellar HDF Member
Joined: Mar 2007
Posts: 2,120
Likes: 192
From: Lakeland, FL
Everything was going so well, I thought I'd replace the front mount, too. Earlier this week/last week, I replaced the oem mount with a new 79d mount. the bike should really badly with it, so I put the rotten old one back in. All was good. I ordered a new 79b Buell mount hoping that would fit better. NOPE. The bike shakes. It's not even a vibration. It shakes. I worry about it breaking things as bad as it is. I rode it about 4 miles, and it was putting my hands to sleep. The last time I rode a bike that shook this bad, my shovel top motor mount had come loose.
What could it be? I tightened all but the three bolts on the mount itself before I started it and let it run a bit. Then, I tightened the last 3.
I'm sure it's something I'm doing wrong. My top and front alignment links fit as they should. I put the D mount back in. It shakes but not as bad. I'm sure if I put the old mount back in, it would be smooth again, but that's not fixing it.
What could it be? I tightened all but the three bolts on the mount itself before I started it and let it run a bit. Then, I tightened the last 3.
I'm sure it's something I'm doing wrong. My top and front alignment links fit as they should. I put the D mount back in. It shakes but not as bad. I'm sure if I put the old mount back in, it would be smooth again, but that's not fixing it.
Last edited by mplecha; Nov 8, 2019 at 04:05 PM.
Thread Starter
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Stellar HDF Member
Joined: Mar 2007
Posts: 2,120
Likes: 192
From: Lakeland, FL
I can't seem to figure this issue out. I've swapped between the b and d mounts about 6 or 7 times, this afternoon with no improvement. I've tried loosening the pivot, one or both stabilizer links, and anything else I could think of. I finally ended up with the old mount back in, and the bike is smooth as silk again. The only thing I can tell between the three is the old mount is about 1/8" shorter than the other two. I'm not sure how that could make a difference, but that's all I can come up with.
Do they over-vibrate at all RPM levels or just in spots?
A few years ago I got an offer coupon from J&P. Just enough to cover one of their house brand front mounts.
Got it on and had a devilish vibe right around 1000 RPM. Like you said earlier, made you think something was going to break.
It settled in and eventually ran smooth, but it took a good 500 miles to get there.
Have you checked your alignment?
A few years ago I got an offer coupon from J&P. Just enough to cover one of their house brand front mounts.
Got it on and had a devilish vibe right around 1000 RPM. Like you said earlier, made you think something was going to break.
It settled in and eventually ran smooth, but it took a good 500 miles to get there.
Have you checked your alignment?
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Stellar HDF Member
Joined: Mar 2007
Posts: 2,120
Likes: 192
From: Lakeland, FL
my alignment is good. vibration is at all rpms. I might try to install one upside down. I think the height difference is keeping the engine from "settling" on the mount.
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Stellar HDF Member
Joined: Mar 2007
Posts: 2,120
Likes: 192
From: Lakeland, FL
not a dumb question. Yes, I've tried 10 and 40. no change. Next chance I get, I'm going to put one of the new mounts in upside down. I think the height of the mounts is the problem.
Ultimate HDF Member
Joined: Jul 2014
Posts: 5,649
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From: MASS_hole
Okay. Dumb question for sure. Are the rubber mounts getting a solid squish. Or are they barely snug?
My opinion on this is that they should be a visible bulge. Not huge, but enough to tell you they fill in nice. A tight fit, not one that may float
My opinion on this is that they should be a visible bulge. Not huge, but enough to tell you they fill in nice. A tight fit, not one that may float
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