EVO Vibration
#32
03-13-2010, 08:22 AM
#33
03-13-2010, 11:07 AM
Road Warrior
#34
03-13-2010, 11:19 AM
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It doesn't have anything to do with it being an Evo. The Twin Cams that aren't balanced shake just as much, as do the Shovels, Pans, and Knuckleheads. It's the nature of a 45 degree, single crankpin V Twin engine. Balance Masters makes balancers for the clutch and compensator that are supposed to make a huge difference in the vibration. They use mercury as part of the weight in the balancers, so the liquid can self-adjust to different levels of vibration. I've got to say their website is horrible, but I've read tests of their products that were very favorable.
#35
03-13-2010, 09:35 PM
#36
03-15-2010, 01:27 PM
Hi,Last year I bought my 91 Ultra,my 1st Harley.Before that I had an 02 YAM TDM900 which was an ok bike,fast & reliable enough,but a bit "soulless. Ive spent quite a bit of money sorting my Ultra out and I am just about getting there. Anyway,to the point...My Ultra does vibrate especially compared to modern Jap. bikes,but know somethin,I love it "vibes" an all. Ive done a few trips of 150 miles(round trip) and I must say..I could sit happily on the Ultra for much longer distances than that. I dont think you should feel uncomfortable after 45 miles or so. Perhaps there is a problem of some kind with the bike. I hope that the frame hasnt been twisted at some time(accident) as that would obviously cause a problem. Best bet would be to get a ride on a similar(or near) bike and see if there is any difference re. vibration.Check the simple/r things thay could cause vibe. probs before tackling "frame/alignment" probs. Good luck and Im sure it will work out ok. Doug.
#38
04-04-2010, 06:16 AM
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#39
05-22-2012, 01:37 PM
Stellar HDF Member
Check out the engine mounts, make sure the exhaust is not touching the frame or anything else as this will cause a vibration. Check the adjustment of the primary chain and final drive belt. Check out the alignment of the drive train. If all this checks out then do a compression and leak down test. If all this checks out then you might want to try an active engine balancer like Fisher etc. Hope this helps. Well I gotta go now, we are going to see Willie Nelson tonight.
Serious question: how does a compression test and leak down test help to determine the cause of vibration? Thanks!
#40
05-22-2012, 02:38 PM
Also, I tried a couple of aftermarket floorboards on my heritage, and they all suck! The only cheap way to get rid of (some) vibration is to use stock boards from 90's- they are vibration dampening. If you don't like the look - just get the inserts that rivet on top of the existing stock inserts - that's what I did!
