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#996656 - 09/11/17 10:40 PM Newb with weird problem  
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Walstib Offline
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Walstib  Offline
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Not new to riding, new to BMW. Bought a 2002 R1150RT with 28K for $3K in May. It is a daily driver, freeway commute of 70 miles each way. Changed all fluids upon purchase. Put 1,500 miles on it in a week this summer. So far, not a single problem.

Going to work today, the drive train "lost" power, in 6th gear, 85mph, suddenly no drive. Throttle was responsive. Eased over to shoulder and was downshifting. Once on shoulder, in 5th gear, the drive train "reengaged". Nursed things along to see if it was a one off or not, after 10 minutes, resumed travel at 85mph and no problems there or back.

Any ideas? I have never owned a shaft drive bike before and am not sure what, if anything to check.

Thanks for any help or guidance.

#996659 - 09/11/17 11:10 PM Re: Newb with weird problem [Re: Walstib]  
Joined: Jun 2010
Posts: 13,196
dirtrider Offline
The Oracle
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The Oracle
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Ohio
Originally Posted By: Walstib
Not new to riding, new to BMW. Bought a 2002 R1150RT with 28K for $3K in May. It is a daily driver, freeway commute of 70 miles each way. Changed all fluids upon purchase. Put 1,500 miles on it in a week this summer. So far, not a single problem.

Going to work today, the drive train "lost" power, in 6th gear, 85mph, suddenly no drive. Throttle was responsive. Eased over to shoulder and was downshifting. Once on shoulder, in 5th gear, the drive train "reengaged". Nursed things along to see if it was a one off or not, after 10 minutes, resumed travel at 85mph and no problems there or back.

Any ideas? I have never owned a shaft drive bike before and am not sure what, if anything to check.

Thanks for any help or guidance.


Evening Walstib

Can you be more specific on the disengagement (tell us everything).

Your problem sort of sounds like the dreaded stripped input shaft/clutch hub spline failure.

Hope not as it is real expensive to repair.

Google BMW 1150 spline failure to see if the symptoms match up to what you experienced.


D.R. ___
Sent from my rotory dial wall phone!
#996667 - 09/12/17 01:14 AM Re: Newb with weird problem [Re: Walstib]  
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Posts: 246
Redman Offline
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Michigan, west Michigan
Originally Posted By: Walstib
Not new to riding, new to BMW. Bought a 2002 R1150RT.................


Sounds just like me 3 years ago.

And later I found the 02 1150RT is the first year of that transmission, and engine, and servo brakes..... the model/year that experienced BMW riders avoid (hence the good price).
Transmission input shaft splines (and associated clutch splines) known to wear and strip out, and the servo brakes known to have expensicve problems.

Mine stripped out on the 5th day. Repair estimate from the dealer was about 3500 bucks.
Some 02 RT have long life with no problem, some fail before 50K, some at 30K. Has been some very indepth discussion on this.

What you described seems like the spline stripp out. Did is sound like zirrrrzirrrrzzirrrr ?
But I have a hard time thinking that could happen, then catch and yhou can go again.

Seems like I can be away from the forum for a few weeks, then logg on and see the same story posted recently.

.


'02 R1150RT, '82 GS1100GK, '86 VT500
#996674 - 09/12/17 01:45 AM Re: Newb with weird problem [Re: Walstib]  
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Walstib Offline
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The disengagement was noise free, no grinding, etc. After reading about spline problems, this does not seem to be what happened.

Going 85mph in 6th gear, the drive function was disconnected from the engine. The engine revved up with no load on it. I rode to the shoulder, downshifted to 5th and power was restored to the drive train. Very momentary, no noise of any kind associated with the loss of drive.

I have had bikes lose the transmission, gearbox, etc. There is always some hellacious clunking and grinding. Not so this time.

The only other thing that appears unusual is that on occasion, the gear indicator is wrong. Usually it will show 6th gear and I am in 2nd or 3rd. This always self corrects when shifting to another gear.

Any ideas? All help is appreciated.

#996675 - 09/12/17 02:12 AM Re: Newb with weird problem [Re: Walstib]  
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Woodchips Offline
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Calgary, Canada
Clutch slippage, high speed, high rpm's !!!!!!


"I SHOULD HAVE DONE THAT SOONER”
Current:
96 R1100RT (2)
Gone but not forgotten:
74 Honda XL350
76 Honda CB350F
74 Yamaha TX 750
76 Honda CB750F
80 Suzuki GS1000G
#996688 - 09/12/17 10:27 AM Re: Newb with weird problem [Re: Walstib]  
Joined: Jun 2010
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dirtrider Offline
The Oracle
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Ohio
Originally Posted By: Walstib
The disengagement was noise free, no grinding, etc. After reading about spline problems, this does not seem to be what happened.

Going 85mph in 6th gear, the drive function was disconnected from the engine. The engine revved up with no load on it. I rode to the shoulder, downshifted to 5th and power was restored to the drive train. Very momentary, no noise of any kind associated with the loss of drive.

I have had bikes lose the transmission, gearbox, etc. There is always some hellacious clunking and grinding. Not so this time.

The only other thing that appears unusual is that on occasion, the gear indicator is wrong. Usually it will show 6th gear and I am in 2nd or 3rd. This always self corrects when shifting to another gear.

Any ideas? All help is appreciated.


Morning Walstib

A little more detail does help. If a quick downshift to 5th restored forward pull then possibly you somehow knocked it out of gear while riding.

Or possibly you didn't have it fully shifted into 6th.

Or possibly you have a worn shift drum or worn shift forks.

You might check the little stub shaft on the transmission for the lever (bolt) being loose.

Check the shift linkage, shifter pedal pivot, & side plate clearance.

You might have to wait to see if it happens again (if it keeps happening & it isn't your foot knocking it out of gear then you definitely have transmission/shifter problem)


D.R. ___
Sent from my rotory dial wall phone!
#996715 - 09/12/17 05:46 PM Re: Newb with weird problem [Re: Walstib]  
Joined: Sep 2003
Posts: 751
Michaelr11 Offline
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Posts: 751
Trinity, NC
Originally Posted By: Walstib
The disengagement was noise free, no grinding, etc. After reading about spline problems, this does not seem to be what happened.

Going 85mph in 6th gear, the drive function was disconnected from the engine. The engine revved up with no load on it. I rode to the shoulder, downshifted to 5th and power was restored to the drive train. Very momentary, no noise of any kind associated with the loss of drive.
................
Any ideas? All help is appreciated.


Sounds like the gear box slipped into a "false neutral". If you are new to BMW R bike transmissions, you may not be engaging your shifts deliberately enough. These gearboxes don't snik/snik/snik through the gears - they SHIFT/CLUNK through the gears. You have to be deliberate in all of your shifts.


Michael Stock, Trinity NC
01 R1100RT, R60/6, R100
#996721 - 09/12/17 08:17 PM Re: Newb with weird problem [Re: Walstib]  
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Walstib Offline
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Thanks for all the feedback and ideas. I will keep an eye on things mentioned.

#996741 - 09/13/17 01:22 AM Re: Newb with weird problem [Re: Walstib]  
Joined: Oct 2013
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Boomer343 Offline
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Alberta, Canada
It's a bit of a pain but I would suggest two things.

First is to pull the starter and check the play in the clutch disc. This will tell you if a clutch/modified clutch/spline replacement is in your future.

Second would be to pull the side plate where the shift pivots and take everything apart to clean and lube. It probably has never been done and makes a world of difference to shifting.


Moto Longa - Vita Brevis
#996743 - 09/13/17 02:37 AM Re: Newb with weird problem [Re: Michaelr11]  
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flars Offline
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Tampa Florida, USA
This gets my vote, also.


2002 R1150RT
1998 R1100RS
Dover,FL
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