New tyres - vibrations? - SV650.org

13-07-10, 07:09 PM

I just had new tyres put on the bike and have noticed alot of vibration coming through the foot pegs when slowing down and dropping down the gears. Would this indicate bad wheel alignment?

Unfortunately I don't have paddock stands at the moment to get an idea myself. Should I go back to the same garage and tell them to sort it out or go elsewhere? I understand Essential Rubber in London have a good reputation, was thinking about taking it to them. Any advice appreciated.

Sid Squid · 14-07-10, 08:26 AM

Wheel alignment is unlikely to be the cause.
Essential Rubber is one of the few places worth giving money to, however as you've already paid someone to work on your bike and you feel there is something amiss with their work, you should give them the opportunity to put it right first.

14-07-10, 10:22 AM

Just through the pegs and not the bars?

14-07-10, 10:32 AM

Sounds like they're out of balance. Maybe a wheel weight fell off... or wasn't put on!

14-07-10, 10:39 AM

interesting you say that berlin, i had new rubber a few months ago and the guy flat refused to balance the rear wheel!! runs fine but i wonder why? his argument was it doesnt need it. i thourght it would reduce bearing wear etc.

thourghts?

andrewsmith · 14-07-10, 04:59 PM

Quote:

Originally Posted by AndyBrad

interesting you say that berlin, i had new rubber a few months ago and the guy flat refused to balance the rear wheel!! runs fine but i wonder why? his argument was it doesnt need it. i thourght it would reduce bearing wear etc.

thourghts?

wheels need balanced to remove the inconstancies in the metal density during the casting process. If the wheel is in balance there is no need for them

Mine would be hard to manage without the wheels balanced

yorkie_chris · 14-07-10, 05:05 PM

More imbalance in tyre than wheel.

14-07-10, 06:16 PM

Front wheel imbalance results in a forward/backward ocillation in the fork and feels horrible. If you look down the forks you can see this happening. The same happens at the rear but it is in an up and down direction in line with the shock so the shock has a chance at dampening it. But what happens when you overwork a shock? The damping fades! So the damping gets overloaded. Your rear shock has a hard enough time of it just dealing with road undulations (especially if standard) without giving it extra to do. Not balancing the rear wheel is just laziness. I can tell the difference in handling with only 20g out on the rear wheel on my race bike.

C

yorkie_chris · 14-07-10, 06:19 PM

Quote:

Originally Posted by Berlin

(especially if standard)

Actually the standard shock has a really easy time, it has no damping so creates no heat at all

13-07-10, 07:09 PM	#1
SimJ Guest Posts: n/a	New tyres - vibrations? I just had new tyres put on the bike and have noticed alot of vibration coming through the foot pegs when slowing down and dropping down the gears. Would this indicate bad wheel alignment? Unfortunately I don't have paddock stands at the moment to get an idea myself. Should I go back to the same garage and tell them to sort it out or go elsewhere? I understand Essential Rubber in London have a good reputation, was thinking about taking it to them. Any advice appreciated.

14-07-10, 08:26 AM	#2
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Bad vibrations Wheel alignment is unlikely to be the cause. Essential Rubber is one of the few places worth giving money to, however as you've already paid someone to work on your bike and you feel there is something amiss with their work, you should give them the opportunity to put it right first. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

14-07-10, 10:22 AM	#3
AndyBrad Guest Posts: n/a	Re: New tyres - vibrations? Just through the pegs and not the bars?

14-07-10, 10:32 AM	#4
Berlin Guest Posts: n/a	Re: New tyres - vibrations? Sounds like they're out of balance. Maybe a wheel weight fell off... or wasn't put on!

14-07-10, 10:39 AM	#5
AndyBrad Guest Posts: n/a	Re: New tyres - vibrations? interesting you say that berlin, i had new rubber a few months ago and the guy flat refused to balance the rear wheel!! runs fine but i wonder why? his argument was it doesnt need it. i thourght it would reduce bearing wear etc. thourghts?

14-07-10, 05:05 PM	#7
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: New tyres - vibrations? More imbalance in tyre than wheel. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

14-07-10, 06:16 PM	#8
Berlin Guest Posts: n/a	Re: New tyres - vibrations? Front wheel imbalance results in a forward/backward ocillation in the fork and feels horrible. If you look down the forks you can see this happening. The same happens at the rear but it is in an up and down direction in line with the shock so the shock has a chance at dampening it. But what happens when you overwork a shock? The damping fades! So the damping gets overloaded. Your rear shock has a hard enough time of it just dealing with road undulations (especially if standard) without giving it extra to do. Not balancing the rear wheel is just laziness. I can tell the difference in handling with only 20g out on the rear wheel on my race bike. C

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