broke the drive shaft!!

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israel
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broke the drive shaft!!

Post by israel »

Yup.
Had a lot of fun at my last track day folks.
On the way home I thought the cluth was slipppping.....
Got home on a tow truck. :(
The dealer showed me the drive shaft, he said that has only happened twice, this one on your 12R and your previus 1150R Mr Calderon. :roll:
Well no more track days for my R.
I am now officially on the market for a 125 two stroke maybe a TZ or
a honda RS.... :wink:
Saludos
Israel

V11 Sport R1150R New Balance 901's
DJ Downunder
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Post by DJ Downunder »

:shock: What a bugger...I'd love to see some pics.

Just wondering..Is it going to be a warranty fix?...I hope you didn't tell them about the track day.. :D

DJ
israel
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Post by israel »

Warranty, it is a new bike after all :D
But one month with out bike.
Glad I still have my Moto Guzzi
it always makes me feel so good.
BUT this would make me feel better!!
Image
Saludos
Israel

V11 Sport R1150R New Balance 901's
DJ Downunder
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Post by DJ Downunder »

Nice..Now that's a better track bike....I think you're having too much fun.. :D

DJ
OU812
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Post by OU812 »

israel wrote:Warranty, it is a new bike after all :D
But one month with out bike.
Glad I still have my Moto Guzzi
it always makes me feel so good.
BUT this would make me feel better!!
Image
Saludos
What do you do for a buttpad? :smt017 :lol:
RIDE TOO PRETEND, PRETEND TOO RIDE. :)
89 Oldwing, 07 WR250R, 14 KX250F
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Optimus Prime
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Re: broke the drive shaft!!

Post by Optimus Prime »

israel wrote:Yup.
Had a lot of fun at my last track day folks.
On the way home I thought the cluth was slipppping.....
Got home on a tow truck. :(
The dealer showed me the drive shaft, he said that has only happened twice, this one on your 12R and your previus 1150R Mr
So exactly what are you doing that is breaking the drive shaft? N8 and Brian race the crap out of their BMW's with stock drive shafts and I've never heard of a problem. Not even after hundreds of miles in endurance racing.

Seriously.
Skippy
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Post by Skippy »

I was thinking the same thing Optimus Prime, if he only broke the one I would have considdered it bad luck but two is a bit weird. Wonder if they broke on decelleration or acceleration.
Black '06 R1200R
israel
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Post by israel »

I ask my self the same thing.
When the R1150 R drive shaft unglued itself I was on the road not the track. It had seen my first few track days i admit, it had 22000 miles on it. I do decelerate with the engine...
The 1200 had 5000 miles on it.
I do NOT want this to happen to me again.
I must be doing something terribly wrong to have done that to my R with so little miles on it.
Comments and sugs are appreciated.
Saludos
Israel

V11 Sport R1150R New Balance 901's
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celticus
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Post by celticus »

Maybe I should lay off the wheelies.
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Post by Skippy »

The only thing I can think of that could cause something like this is a big differance in speed between the output shaft from the gearbox compared to the speed of the wheel and the driveshaft itself. if you just shut the throttle on decell all parts should more or less decell at the same speed but if you for instance shut down from very high revs and aply the rear brake very hard at the same time without encaging the clutch this might put a lot of force on the drive shaft(allthough it seems very unlikely to me). What I'm trying to say is if you encage the clutch the rear wheel turns the drive shaft and when you let the clutch go the motor will, if there's a big differance in speed between them things might go wrong. Normally though there shouldn't be a ot of differance between all these parts unless you are doing something a bit weird like reving up to 7000rpm at standstill and letting the clutch go(I wonder how one would achieve this but this is just an example to cause great differances in speed between the parts) or going 120mph with the clutch in and your engine at 1100rpm and letting the clutch go to let your engine brake the rear wheel and driveshaft that are obviously turning mutch faster.

All of this is just speculation on my part and maybe I'm missing something obvious but that's the only thing I can think of along with a faulty part(although highly unlikely to happen twice to one owner).

Maybe you recognise something in your driving style that could cause the problem but normal accelaration or decelaration should not be causing so mutch stress to the drive shaft to let it break. Maybe you can discribe how you brake on the engine(just let go of the throttle or also downshift one or even more gears?) might be better on the track to just use the brakes more(gp bikes and superbikes have slipper clutches so they also don't brake that mutch on the engine).
Black '06 R1200R
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