Diagnostic HELP please. No power to rear wheel

[RevRay]

My 05 r1200gs approaching 90 thousand miles stopped delivering power to the rear wheel.

A little back ground here, Im an enthusiast rider, often running just under the rev limiter when riding with sport and sport touring motorcycles. The bike is serviced regularly and well maintained. That said; when accelerating out of a corner the bike jumped out of gear, I tried to shift to no avail coasting to the side I tried shifting again only to hear the most ungodly sound emanating from the engine, I shut down the bike restarted and tried shifting again only to get same sound that would change when the clutch was depressed. My initial thoughts "blown clutch"? But would the clutch go with out warning? I think this is going to be a winter project/learning experience any and all suggestions welcome.

Thanks

[Paul Mihalka]

My WAG is clutch splines. The symptoms match. Not so frequent in R1200 bikes than in R1150, but can happen. My '05 R1200GS did it at 70K miles. Where are you? Did you make it to the UNrally?

[Huzband]

My WAG is clutch splines. The symptoms match. Not so frequent in R1200 bikes than in R1150, but can happen. My '05 R1200GS did it at 70K miles. Where are you? Did you make it to the UNrally?

 

Could be, but I'm thinking output shaft splines stripped. Happened to me one late night in I-59 outside Tuscaloosa on my R75/6.

 

RevRay, it didn't jump out of gear, it just felt like it did. Best of luck with the fix.

[RevRay]

Where are you? Did you make it to the UNrally?

 

Im home, MOA and Unrally plans were dashed with the passing of my mother in law.

 

Ray

 

 

 

[Paul Mihalka]

I'm very sorry, I missed that. My condolences to you and your wife.

[dirtrider]

Morning RevRay

 

I could it be the trans/clutch splines as mentioned above but I'm more thinking the drive shaft might have broken.

 

Very few clutch spline issues on the 1200RT's but a lot of reported drive shaft failures on the 1200RT (especially the early 1200 hexheads before the drive shaft update)

 

Put the bike trans in gear then try pushing the bike. If you get a strange noise then put the trans in neutral & push the bike again. If the noise is still there when pushed in neutral you probably have a broken drive shaft.

 

[Paul Mihalka]

RevRay posted that with the clutch pulled it makes a different kind of noise. If it is the drive shaft or gearbox output splines with the clutch pulled there shouldn't be any odd noises - the gear box and drive shaft are not turning.

[dirtrider]

Afternoon Paul

 

Yes, that could still mean drive shaft as there is still a bit of clutch drag with the clutch lever pulled in.

 

As a rule spline issue noise goes completely away with clutch lever pulled in but even that isn't a sure thing.

 

[RevRay]

Afternoon Paul

 

Yes, that could still mean drive shaft as there is still a bit of clutch drag with the clutch lever pulled in.

 

As a rule spline issue noise goes completely away with clutch lever pulled in but even that isn't a sure thing.

 

DR

I've been real busy and have not as yet been able to follow your suggestion, but I was able to coast almost a mile down hill in neutral without any unusual noises emanating from engine or final drive.

[dirtrider]

Evening RevRay

 

That might not eliminate the drive shaft if it broke right at the rear U joint.

 

The only way to know for sure what you are dealing with is start checking it out.

 

[RevRay]

DR,

Again thanks for inputs, I will get started sometime next week, first step is to make room, work bench for bike and prep the motorcycle storage shed to a motorcycle work shed. Looking forward to getting this project started. I'll post photos and keep you posted.

RR

[RevRay]

DR,

Again thanks for inputs, I will get started sometime next week, first step is to make room, work bench for bike and prep the motorcycle storage shed to a motorcycle work shed. Looking forward to getting this project started. I'll post photos and keep you posted.

RR

 

Seeing the date to my post I realize time is flying, I started disassembling on 8/22 couple hours each night. Im finding the process very therapeutic go figure. Taking my time labeling plugs, wires and taking lots of photos. Following the steps detailed in the BMW repair DVD, Saturday afternoon when getting ready to separate the frame when I was halted by absence of two "Grub Screws" bmw part # 83300402303 A quick ride to my local BMW dealer some six dollars later parts where ordered, they should have arrived today. As luck would have they did not arrive. Now it looks like I'll have to wait until next wednesday. At this rate it looks like I'll be F.A.R.Ting from my honda at Maggie Valley.

 

 

[mbelectric]

I see the woodworking skills you possess have paid dividends Ray.

 

I have no doubt you will get this done without issue.

 

Get 'er back on the road.

 

MB.

[w2ge]

If it's grub screws you needed, it's good to know if you have a local machine shop supply house... they carry all sorts of fasteners, probably would have been sitting on their shelves.

 

 

 

 

 

[RevRay]

If it's grub screws you needed, look for a local machine shop supply house... they carry all sorts of fasteners, probably would have been sitting on their shelves.

 

Grub screw new terminology to me, From photo it appears to be a long set screw. I'll check screw size, is it safe to determine length of grub screw by length of threaded shaft on bolt from under bolt head to end of bolt?

 

Thanks

[w2ge]

I'm not a machinist (but I play one on TV... ;-)

 

To me, a grub screw and a set screw are the "same" thing... just different terminology. (I think "grub" is used more so in other countries.

 

Yep, I believe the length is a measure from "point" to top, or if it has a head, below the head to the point, that is, the length of the "shaft".

 

Found a good link: http://en.wikipedia.org/wiki/Set_screw Grub screw is usually in UK and called that cause it looks like a "grub"!

 

Can't you just remove one and bring it over to the supply house? they will gladly match one up for you.