Improper rear wheel alignment - TwoWheelForum: Motorcycle and Sportbike forums
 
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post #1 of 6 (permalink) Old 05-30-2008, 09:06 PM Thread Starter
 
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Improper rear wheel alignment

Hey fellas I need help. Have 07 GSXR-750, had my chain adjusted at dealer and since then the bike wiggles (like I was driving over metal grading or grooved roadway) especially at low speeds. Could this be due to the rear wheel not being aligned properly? Any information will help. Thanks.
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post #2 of 6 (permalink) Old 05-30-2008, 09:41 PM
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Yes,also if the chain is too tight the bike will "pulse" because the sprocket, sprocket carrier and wheel are NOT perfect circles and the chain will have a tight spot guaranteed. I'm VERY picky about wheel alignment and bought a chain alignment tool and aftermarket chain adjusters. Hopefully you a strong friend,turn the wheel slowly until you find the tightest spot on the chain. loosen the axle and adjust the chain to spec- approx 1"+ about 1/4 to make up for the change when you tighten the axle. Get both sides the same,use a caliper,a metal ruler,a stick,count the threads on the adjuster,whatever you can do to get it as perfect as possible. Tighten the axle nut and recheck your play. If you adjusted it at the tightest point then the chain will be slightly tighter at that point than necessary but looser at the opposite side of the sprocket. If it's too tight at the tightest spot with the axle nut tight then loosen the axle nut and loosen each adj one wrench movement-you can only get so much of a turn with a wrench- be precise. Tighten the axle nut and you should be good to go. BTW if you have to loosen a chain always make sure the axle blocks are up against the adjusters,give the tire a kick,before you tighten it. If you take your time and get everything perfect now,all you'll have to do when you need to tighten the chain is keep track of the turns you put on each adj.


Last edited by TIGGER; 05-30-2008 at 09:43 PM.
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post #3 of 6 (permalink) Old 05-31-2008, 01:17 PM
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Here is a good writeup on using the string method of wheel alignment.

http://www.yamahafz1oa.com/sportryde...ntmethod.shtml

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post #4 of 6 (permalink) Old 05-31-2008, 02:30 PM
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Quote:
Originally Posted by pickle.of.doom View Post
Here is a good writeup on using the string method of wheel alignment.

http://www.yamahafz1oa.com/sportryde...ntmethod.shtml
Great post P.O.D.! Otherwise get an alignment tool for about $20 http://www.motionpro.com/motorcycle/...lignment_tool/ It works great and only takes a minute to use. You just clamp it on the sprocket and check the chain. To be honest,that's what your dealership should be using!

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post #5 of 6 (permalink) Old 05-31-2008, 02:38 PM
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I use one of those too, for checking when I change tires or adjust the chain, but still use the string job once a year to make sure everything is in line. The string can spot a bent frame, bent swingarm, bent/twisted forks in some cases, and when you use it to make sure front and rear wheels are both aligned, you can measure your wheelbase from axle to axle with the string pretty easily too. Valuable tool, that string.

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post #6 of 6 (permalink) Old 05-31-2008, 02:43 PM
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Quote:
Originally Posted by pickle.of.doom View Post
I use one of those too, for checking when I change tires or adjust the chain, but still use the string job once a year to make sure everything is in line. The string can spot a bent frame, bent swingarm, bent/twisted forks in some cases, and when you use it to make sure front and rear wheels are both aligned, you can measure your wheelbase from axle to axle with the string pretty easily too. Valuable tool, that string.

I never thought of that....hmmmm...where's my tacklebox!

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