2000 LT, U-Joint play? - BMW Luxury Touring Community
 
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post #1 of 8 Old Mar 30th, 2006, 8:25 pm Thread Starter
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Smile 2000 LT, U-Joint play?

Can anyone tell me what is the allowable play in the U-joint?
I've noticed some clunking sounds at times when letting off the throttle and powering back up.

I set the bike on it's center stand and placed it in 1st gear. With the engine off I rolled the rear tire forward and backward to get an idea of the amount of wheel travel.

Just wondering what it should be?
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post #2 of 8 Old Mar 31st, 2006, 6:47 am
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U-joint Play

Quote:
Originally Posted by Doug_Gentry
Can anyone tell me what is the allowable play in the U-joint?
I've noticed some clunking sounds at times when letting off the throttle and powering back up.

I set the bike on it's center stand and placed it in 1st gear. With the engine off I rolled the rear tire forward and backward to get an idea of the amount of wheel travel.

Just wondering what it should be?
Doug, if you rock the rear wheel you checking the play in the final drive gear, the drive shaft - u-joint assembly and the transmission gear play. I doubt their is a good way of seperating or identifying u-joint play without pulling the drive shaft out.

Don't know if this helps but hopefully more seasoned and knowledgeable members will chime in.

FYI On my 85 K100 I replaced the drive shaft due to a loose U-joint at 55 K.

Roy Gregersen

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post #3 of 8 Old Mar 31st, 2006, 9:02 am
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Quote:
Originally Posted by Doug_Gentry
Can anyone tell me what is the allowable play in the U-joint?
I've noticed some clunking sounds at times when letting off the throttle and powering back up.

I set the bike on it's center stand and placed it in 1st gear. With the engine off I rolled the rear tire forward and backward to get an idea of the amount of wheel travel.

Just wondering what it should be?
Don't think there is a "standard" for this, but on mine there was approx. 2-3" of back/forth movement at the tread of the tire, from memory. I know this from checking valves, used the wheel to "bump" the engine around.

Someone with another LT can check this pretty quickly. Unfortunately, my garage is empty of bikes.

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post #4 of 8 Old Mar 31st, 2006, 10:25 am
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As David said, I get about 2-3 inches of movement when in gear on center stand and move the wheel back and forth. I also get the clunk sound when I let off the throttle to decelerate then give it throttle there is like a clunk or as I like to think an "engage" sound. I think it is pretty normal. If our bikes are the only 2 that do it and shouldn't please let us know.

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post #5 of 8 Old Mar 31st, 2006, 11:24 am
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They all klunk a little

Especially when pulling the clutch in/out at parking lot speeds. I've noticed that a lot on mine. I'm fairly sure it's normal. I wouldn't worry about.

U-joint problems mostly manifest themselves as vibrations..

John

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post #6 of 8 Old Mar 31st, 2006, 1:17 pm
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My rear tire also has a couple of inches of play. I don't know about the "clunk", as I wouldn't be abel to hear it over the clanging rear brake disk.

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post #7 of 8 Old Mar 31st, 2006, 1:43 pm
 
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Quote:
Originally Posted by Doug_Gentry
Can anyone tell me what is the allowable play in the U-joint?
I've noticed some clunking sounds at times when letting off the throttle and powering back up.

I set the bike on it's center stand and placed it in 1st gear. With the engine off I rolled the rear tire forward and backward to get an idea of the amount of wheel travel.

Just wondering what it should be?
The only wat to check the rear U joint is to pull the rubber boot back. There should be ZERO play. I say this because I swapped FD'S and the new replacement U joint had ZERO play. The FD I Removed had about 1-2 mm rotational play. I feel the old FD would have held up, It had 72K 0n it. Also the 02 FD had the 19 roller ball bearing. The front U joint from the trans output shaft have been known to be problem free, so I'm told.

Petem aka murray
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post #8 of 8 Old Mar 31st, 2006, 6:35 pm Thread Starter
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Smile Free play

I know I get a lot more than 2 or 3 inches I was rather surprised to see just how much play it had. I think it has like maybe 8 inches or so.

I think I'll go to the dealer this weekend and see what their bike has sitting on the show room floor.

I'm trying to figure out the best way to measure this so it's accurate.

maybe just sit on it while in gear and turned off, roll forward and backward. Maybe have my hunny use a yard stick to mark the cement from under the forks, move forward and remark and measure???

The bike feels good, It has no vibrations, no looseness to it. It only has 33K on it.

The only time I even hear a clunk is like you guys say, low speed parking lot or deceleration with a quick move forward, I can hear that "Engaging" sound.

I think I'm fine, I was just curious.


Also, I just love that little signature "If it has tit's or an Engine, you're gonna have trouble."

Snicker... and just think, you can have both re-built!
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