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Discussion Starter · #1 ·
I have a 2002 wing with a right front rotor that has .030 ths run out. the left side has .007 ths. looks like some ham fisted mechanic might have bent it. I do have pulsating grabby brakes and i would imagine this to be the cause. I am going to take it to my buds machine shop to see if i can straighten it. how much run out is acceptable ? new ones are 368.01 dollars each. bike bandit has them for 267.00 dollars. grrrrrrrrrrr:lash:

cyclepath
 

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Junior Grue
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Don't know about the 1800 but my 1200 has a run-out service limit of 0.010" so 0.030" would seem to be excessive.

Have you checked for contamination between the wheel and rotor?
 

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Anti-Guru
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eBay may be an option, but 0.030 (inch) is waaaaaay too much... spec is under half of that

Good news is that you should be able to find reliable used for less than 20% of OEM new, breaker yards or eBay could help...
 

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Wonder how it happened?
Tire shop wanted to clamp onto my rotors to change the tires and i said HEY!!!!! Don't you dare do that.
 

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Wonder how it happened?
Tire shop wanted to clamp onto my rotors to change the tires and i said HEY!!!!! Don't you dare do that.
In almost the same vein, if the rotors were removed to change a tire, they may not have been reinstalled correctly.
 

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Should be able to get one from eBay at a good price .. This is what I have done
 

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In almost the same vein, if the rotors were removed to change a tire, they may not have been reinstalled correctly.
Best to take off the rotors to change tire. Putting them back on is no biggy if you do what service manual says ..But they are easily bent out of true if dropped or knocked over
 

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Discussion Starter · #8 ·
ok"thanks guys. i figured 30 thou was way to much. i bought the bike this way but was not aware of this and i don't think the owner was either. he had the bike serviced at beaverton honda in oregon and so far everything i have had to do to this bike was "mucked up by that dealer. it's the only place he had it serviced. had 54,000 miles on it when i bought it. i just replaced the brake pads and changed the fork oil and found the bent rotor as i was about to put on a new tire. and i know if you are going to change the tire on the ground with a couple of tire irons you need to remove the rotors or take a chance on bending something. i will remove them and check the mounting but i doubt that is the problem. not to sure about buying used from sleazebay or craigslist. might end up with the same crap i already have.
 

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I've come across a few GL1800's with severely warped front rotors. All have been right side if memory serves. I have no good evidence why this happens. My gut feeling is it's something to do with the bike or the way it was ridden rather than a mistake someone made when servicing it. Something that really tends to warp rotors is leaky fork seals...if the fluid contaminates the rotor. This could have happened in the past. If someone has a lazy foot or hand, or is overagressive on the brakes it can overheat the rotors. Then there's this most recent recall on 1800's...the secondary master cylinder inspection. You might want to make sure it's been done. And...I'm not sure the inspection will always 'spot' a bad SMC. I'd say take a nice long ride and when you're done...check the rear wheel to see if it spins as freely as it should.
 
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