Vibration issue

[stev36mc]

Hi All,
I have a 92 FXLR which is giving me some vibration problems at specific speeds. I get a uncomfortable vibration through the footpegs and frame from 30-50mph (50-80 kph) which smooths out and dissapears at higher speeds. I have replaced the front motor mount and the two stabilizer links with VelvaRide products thinking they had gone bad, without making any difference.
Any ideas/experiences fellas?
Thanks Steve.

[Ka-Ka]

I had similar problems. I replaced the same three parts first. My front engine mount was extremely dry-rotted. The center section of the rubber had separated from the outer section. One of the rubber eyes on the upper control link was disintegrated and there was metal-to-metal contact.

While these replacements helped some, the vibration didn't go away until the 2 rear swing-arm rubbers were replaced. The old ones were soft and plyable, actually allowing the entire drive-train to sag about 3/4" inside the frame. The new stiffer rubber mounts raised the assembly that amount and keeps it from vibrating against the lower frame section now.

These rear mounts took 7 days for the dealer to get in. Cost was $84 for the pair. The package was titled "Swing-arm isolator mount kit", or similar. If you remove the long bolt that passes through the swing-arm and tranny, examine it's condition. After 22 years mine has worn so thin in the tranny section that I'm surprised it hasn't been sheared. I just threw it all back together to make the state rally last weekend. In a couple weeks I'm stripping down to the frame for a winter-long bike build. Parts like this will be replaced then, of course.

I went with factory parts because of convenience. There's no one around here to accept packages during the construction season. Going to area H-D dealers is much easier. While I didn't mind paying $42 for the front motor mount and $84 for the rear kit, I felt I kinda got screwed on the 2 H-D control links for $49 each. I see aftermarket versions that are half that price and chrome plated.

Good luck

[stev36mc]

Hey, thanks for the input Ka-Ka, sorry for the delay in getting back, but will surely check this out as you recommend as soon as I get chance.
Cheers.

[Fred1369]

"I went with factory parts because of convenience. There's no one around here to accept packages during the construction season. Going to area H-D dealers is much easier. While I didn't mind paying $42 for the front motor mount and $84 for the rear kit, I felt I kinda got screwed on the 2 H-D control links for $49 each. I see aftermarket "

Ka-Ka, the front rubber isolator for a fxdx costs over $100.