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Old 09-01-2009, 07:58 AM   #1
Coast Rider
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Tire Balancing issues.

I recently needed new tires. So I went to a motorcycle shop listed on here. I saw the whole proccess. It seemed pretty good.
After the tire change, I put about 100 miles on the tires. Then test it for high speeds. Everything is smooth a until 110. Front end is vibrating pretty bad. At 120 vibrating like crazy. So I go back to the shop and tell the shop manager. " dude either the tire is not balanced right or your machine is out of calibration. And he tells me " oh its just the tire pressure. When I left the shop the first time tire pressure was 42/42 as indicated by manufact. specs for zx14.
So he takes it down to 36/ 42 vibration is still the same.

The reason why I think his machine is not calibrated is because there was no vibration before. Also A friend of mine has been going their with his zx10 and he has horrible vibration at 110mph and gets worse at higher speeds and also he keeps blowing his fork seals. he rides high speed a lot so. The shop manager said that he has several zx10's and that they all blow seals and its just normal to keep replacing them.

So I took his front tire and back tire off and took it to cycle gear to have them balance it. Put it back on and 160 mph smooth as butter. I take off mine and do the same smooth as silk.

Does anyone know how often these shops calibrate their machine. I don't want to discredit any shop but WTF. Opinions?
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Old 09-01-2009, 08:05 AM   #2
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just call and let them know what you did and result. They will appreciate the kindness of not bashing them. It's hard to tell if the machine is out of calibration. That's why manual balance system is the sure thing.
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Old 09-01-2009, 08:05 AM   #3
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That's why manual balance system is the sure thing.
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Old 09-01-2009, 08:18 AM   #4
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just call and let them know what you did and result. They will appreciate the kindness of not bashing them. It's hard to tell if the machine is out of calibration. That's why manual balance system is the sure thing.
I have tried it before but master techS are not known for their humility.
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Old 09-01-2009, 08:21 AM   #5
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I have tried it before but master tech are not known for their humility.
too bad and too sad, there goes the business.
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Old 09-01-2009, 08:30 AM   #6
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Like I said before, the do good work because I have seen it. I would have done everything the same way. They just have a bad machine
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Old 09-01-2009, 08:35 AM   #7
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I'm not a fan of spin balancing tire / wheel assemblies. Static balancing is by far superior if done properly.
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Old 09-01-2009, 09:41 AM   #8
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IF i owned a business, then I would personally want to know. IF you have to, speak with a manager and explain what happened.

IF it was my company, I would offer a refund on the amount that the client paid for the balancing.

Lots of IFs there, but just my 2 cents.

OOO another IF.... IF they do make good with you, then I would give them props for getting the problem fixed. IF they dont, I sure would post who it is so we (MH forum members) dont have the same issue.
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Old 09-01-2009, 02:54 PM   #9
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I dont know exactly were your going to be doing 110, 120 and 160mph to test that out. Bad law breaker.
This was performed on Air strip by the don't try this at home guys

Any anyone whinning about anyone doing 110mph obviously needs to go hang out in the vespa club
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Old 09-01-2009, 03:03 PM   #10
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It does sound like the shop's balancer is out of calibration.
Talk to the owner or manager of the shop and not just the service guys. IMHO in the interest of safety for other members of the MH family it might not be a bad idea to name the shop, but it would be polite to give them a chance to fix it.

BTW don't let bigbob bust your chops, I have a feeling he's been to that "airstrip" before...
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Old 09-01-2009, 03:05 PM   #11
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The machines can be calibrated by the service techs w a bare rim.
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Old 09-01-2009, 03:08 PM   #12
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Check the wheel to make sure it's true. A perfectly balanced wheel with a slight hop will have a vibration at high speed.
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Old 09-01-2009, 03:13 PM   #13
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^^^good point.

An unbalanced assembly will have a period before and after where the balance improves. An assembly that has a defect in the recoil of the tire or bend in the wheel would cause an increase shake as speed increases.
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Old 09-01-2009, 03:14 PM   #14
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I just relized... I put a new rear on last week and totally forgot to balance it... LOL oops. Oh well it rides nice at 160, not even a wobble
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Old 09-01-2009, 03:23 PM   #15
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Quote:
Originally Posted by Coast Rider View Post
This was performed on Air strip by the don't try this at home guys

Any anyone whinning about anyone doing 110mph obviously needs to go hang out in the vespa club
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No, Its called doing it on a closed coarse where you dont endanger the lifes of other people around you.
that usually means on a closed course... can't you read?

and your statement also contradicts itsself. on a closed course where you don't endanger the lives of others... are others on this same closed course? if so, then you are still endangering them

and you misspelled course, if that is the meaning you were going for instead of rough sandpaper
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Old 09-01-2009, 03:32 PM   #16
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Quote:
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that usually means on a closed course... can't you read?

and your statement also contradicts itsself. on a closed course where you don't endanger the lives of others... are others on this same closed course? if so, then you are still endangering them

and you misspelled course, if that is the meaning you were going for instead of rough sandpaper


Back to the OP, The machine is supposed to be calibrated pretty often. A bare rim that has been confirmed to be true is used. Call them and tell them, they will either tell you NUH-UHHH or will thank you and give you a refund.
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Old 09-01-2009, 03:33 PM   #17
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No a closed course is a closed course. And airstrip is a fk airstripe. Planes do land on my strip but since its a military one we get to play around sometimes.:
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