vibration problem

**motelbob** · 29th November 2005, 19:18

Just had new tyres fitted front and back,got my rf serviced at the same time. Now iv'e got a nasty vibration that kicks in at 100kph and gets worse till around 140-150kph then flattens out to a small niggle. Theres always been a slight vibration at 100kph but not as bad as it is now. Can new tyres cause this problem? Really feel it humming through the tank and coming up through the footpegs Bloody annoying. Anyone got any suggestions?

**HCW** · 29th November 2005, 19:32

Check your chain for any tight spots. They may have adjusted your chain without noticing a tight link (easy to do). Let us know what u find.

**motelbob** · 29th November 2005, 19:41

cheers. will do

**KLOWN** · 29th November 2005, 19:52

If it was a car id say your wheels need balancing. I assume bike tyres get balanced aswell?

**Sniper** · 29th November 2005, 20:05

I would edit those speeds matey, but yea, check if they balanced the tyres.

**KLOWN** · 29th November 2005, 20:45

I'm sure he was "testing" his new tyres on a track at those speeds

no one on kb breaks the speed limit!

**miSTa** · 29th November 2005, 21:06

Originally Posted by KLOWN

I'm sure he was "testing" his new tyres on a track at those speeds

no one on kb breaks the speed limit!

Just like there's no porn on the Internet.

But to get back on topic, chain and or tyre balance sound likely cuplrits as has been suggested.

**Dadpole** · 29th November 2005, 21:18

Or - possible flat spot on tyre?
Probably a rare thing. Only ever seen one on a bike tyre, and was caused by long term storage (6 months) with stuff piled on top of tyre.

**T.W.R** · 29th November 2005, 21:47

check the chain ( but the adjusters shouldn't have been touched while doing a tyre change).
check the balance ( put the bike on the centre stand & find the heavy spot of the wheel, if its balanced the valve should fall to the bottom of the wheel when the wheels spun a round & slows & comes to a stop).

check to make sure the tyre has been seated on the rim properly! ( sometimes when the tyres blown up 1st time to seat it, it doesn't fully bed on the rim )