vibration at high speed

Post by **hallsie** » Sat Mar 19, 2011 8:34 am

Took the bike out last weekend and i noticed at high speed around 80-110 (ahem Mr officer

) I was getting a steady vibration right through the bike. The wheels are balanced but I have noticed that the bt090's have started to wear flat ( 6 months

) already and I have done very little miles really , I have never felt this before but it seems to be coming through the frame , has anybody any clue as everything is nice n tight and torqued correctly

Post by **Davez29** » Sat Mar 19, 2011 9:50 am

Could check your chain and alignment, this may give the vibration you have another possibility could be wheel bearings. I have the same Pirelli Diablos that I put on 2 years ago, and apart from the snowy weather I use the bike nearly every day, around 10000 miles so far, front and rear

, the rear does however have that flat spot, mainly due to motorway riding. Will need to change the rear by the summer I suppose.

Post by **hallsie** » Sat Mar 19, 2011 10:25 am

I have a new chain and sprockets on there now so didnt think about that one but was pretty thorough when I checked the alignment when I put it all back together ( tape measure to swing arm etc ) , I will pop it into the local bike shop to get double checked as thinking about it this is the only area where it could possibly be.
cheers

Post by **petrolhead19** » Sat Mar 19, 2011 7:36 pm

could be something simple like your wheel or wheels are out of balance, sounds like that anyway

Adam

amorti · Post by **amorti** » Mon Mar 21, 2011 10:12 am

petrolhead19 wrote:could be something simple like your wheel or wheels are out of balance, sounds like that anyway

Adam

Yeh, that.
Or wheel or sprocket carrier bearings.

Post by **petrolhead19** » Mon Mar 21, 2011 1:07 pm

sprocket carrier bearings would make a real horribly crunching sound as your riding along wouldnt neccaserally give a wobble at high speed. my carrier bearings have mangled themselves and mine didnt wobble just made a horrible sound.
Wheel bearing is a possibility, but i would check wheel balance first

Adam

amorti · Post by **amorti** » Mon Mar 21, 2011 2:34 pm

petrolhead19 wrote:sprocket carrier bearings would make a real horribly crunching sound as your riding along wouldnt neccaserally give a wobble at high speed. my carrier bearings have mangled themselves and mine didnt wobble just made a horrible sound.
Wheel bearing is a possibility, but i would check wheel balance first

Adam

On a 600 divvy I had one shred itself and exit as swarf over the chain. By the time it was that bad it certainly gave some vibrations!
That's the problem with don't-care-about-it hacks, the usual method of diagnosis is to wait til the problem becomes very apparent.

vibration at high speed

vibration at high speed

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