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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> High speed vibration /cgi-bin/YaBB.pl?num=1468135130 Message started by phatmanswingin on 07/10/16 at 00:18:50 |
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Title: High speed vibration Post by phatmanswingin on 07/10/16 at 00:18:50 Hey savage enthusiasts, my bike starts to vibrate fairly good at around 65 or 70 mph. At 75 it vibrates pretty good which is as fast as I've had it because the vibration frankly scares me. I'm a new rider, I got my license in May. Just for full disclosure, I also weigh 350 lbs. My question is, is this normal for this bike because of the size and/or type of the engine i.e. a single cylinder or some other reason? Is it my weight? Its an 02 with about 5000 miles on it. I'd really like to drive it on the highway but don't feel confident to do so cause of this vibration. I should add that up to 60 it rolls like a dream. Also, it doesn't do anything else, like noises or smells or anyrhing, just this excessive vibration. Any help, advice or suggestions? Thanks |
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Title: Re: High speed vibration Post by stewmills on 07/10/16 at 07:09:55 I think it is the nature of the bike. If your wheels are in balance, not much else it can be. The smart folks will chime in and maybe offer some thoughts. |
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Title: Re: High speed vibration Post by Ruttly on 07/10/16 at 13:05:53 Is it a engine vibration or a handling issue/ wheel wobble or wheel hop? Make sure your tire pressure is correct & check condition of the tires - tread - sidewalls - age old tires tend to ride hard and not grip as well. Your a big guy is the spring preload on your shocks set to max stiffness, too soft in the rear can affect how front end rides & steers. |
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Title: Re: High speed vibration Post by justin_o_guy2 on 07/10/16 at 14:13:21 Loose motor mount bolts are often involved in excessive vibration. The peg bolts go through the motor. Gotta be tight.. torque specs are available. |
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Title: Re: High speed vibration Post by phatmanswingin on 07/11/16 at 22:07:16 Thanks guys, I'm a new rider, as I said, and I'm NOT a mechanic but the vibration feels like wheel/tire thing and not the engine. The tires are near new. I'll check the pressure when I ride it next, after my hand heals another 10 days. |
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Title: Re: High speed vibration Post by gizzo on 07/12/16 at 04:04:32 Easy to test that. Get up to the speed it v vibrates at and pull in the clutch and let the throttle go to idle. If the vibe stays the same, its not likely to be the engine. |
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Title: Re: High speed vibration Post by Kris01 on 07/12/16 at 11:40:06 At around 65 or so, she feels like she's gonna explode. It's normal for this bike. |
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Title: Re: High speed vibration Post by justin_o_guy2 on 07/12/16 at 11:58:36 73696D6F6E506172747269646765000 wrote:
Do that.. |
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Title: Re: High speed vibration Post by springman on 07/12/16 at 12:53:35 I'm not one of the smart folks, but I agree with the other guys, somewhere around 65-70 there is a pronounced difference in how the bike feels, how much it vibrates. You get used to it. I rarely push my bike above 75 but I have had it close to 90 once or twice and it really does not feel very stable at or near it's limit. |
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Title: Re: High speed vibration Post by justin_o_guy2 on 07/12/16 at 13:05:18 Discussing vibration is subjective. What one considers alarming might be an annoying buzz to another. If someone is wondering if it is engine or tires or what, they can isolate the engine from the equation. Do That,, if it still vibrates idled down with the clutch in, then look at tires. |
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Title: Re: High speed vibration Post by RaleighGuy on 07/14/16 at 04:51:45 I was thinking about this topic this morning on my way to the office. I normally drive 25 miles to work about twice a week and half of it is 65MPH zones. I was coming up US1 north and gunned it a little to get around a couple of cages that were doing dumb things (mostly crossing the white lines like they couldn't see them). Anyway, I digress.... :o Now, I'm 200 lbs and only 5 ft 6 but I got it up to somewhere between 75 and 80 and noticed it vibrating significantly more than usual for highway driving. But it didn't feel unsafe, just irritating. I know after 10-20 minutes of that type of jarring, I'd be ready to take a long break with some Pepsi and peanuts at the Sheetz somewhere nearby. That's a southern thing, pour a package of peanuts into a bottle of Pepsi and kick back a big 'ol swig...... Mmmmmm. But again, I digress. Like J.O.G. said, it's also quite relative. I think a bike that is less than 400 lbs is going to shake a little at that speed. But definitely be sure your tires have decent tread and are aligned well. |
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Title: Re: High speed vibration Post by Kris01 on 07/14/16 at 19:27:47 Being a large single cylinder with a long stroke, it's going to vibrate at speed. That's only natural. You can do the chain conversion or Kawasaki pulley mod and bring the RPMs down and it will be smoother at higher speeds. |
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Title: Re: High speed vibration Post by Kris01 on 07/14/16 at 19:29:20 I know several people who pour peanuts in their Coke (some who even eat the shells!). I was born and raised Southern but I'll pass. Eat peanuts first THEN drink the Coke! You have to do it in that order! ;D |
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