Unremovable sprocket nuts. Help!
 

I am wanting to remove both the front and rear sprockets on my 996r. The problem is they just will not budge at all! So far I have broken my breaker bar and ridden my bike to 6 different garages to see if they can loosen them and nobody as managed it yet. We have had long breaker bars with scaffold pole extensions, large snap on air impact wrenches, and even warming the nuts with the welding torch and trying both the previous methods. Nothing has worked so far and wanted to know what my options are. I am getting to the point where I am considering destroying the nuts just to get them off. Am put off by the risk of damage to gearbox output shaft and rear stub axle though.

Martin you've managed to remove an engine from a beetle with only a pick-axe.... this should be an easy challenge for you :p

Jon it was actually a pick axe and a pair of mole grips!

Clarkmeister had the same prob on his 748.The nut had to be destroyed to get it off.
Have you tried loosening the wheel side first?Sometimes it can tension the sprocket side,....not sure how tho,...but I have been told on good authority.

Yes tried that KeefyB, had the wheel still on but the nut fingertight. Going to try another mates garage in the morning. Someone said to get the nuts Red hot first but I dont really fancy that with the new chain in situ!?

are you trying in the right direction?- righty tighty, lefty loosey.
:lol:

or is it the other way round?????

On the Ducati Corse Mg swingarm it is ;)

There you go then Martin - have you been inadvertently tightening up the nuts?

No I havent been tightening them, I had a good trawl round here and all the info says they are normal thread. Also can see a little bit of thread poking out the top of the nuts and it appears normal. However we did try the other way just to see if we could get any movement at all and there was none. I finally managed to get in touch with my fave mechanic and he said to order a pair of nuts as he will get them off but originals will be scrap. Only problem I can forsee is whenever he comes round to give me a hand him and his dog end up staying here for about 3 days!

Thanks for the replies chaps! Finally got the ******g things off. The rear one was embarresing as when matey applied his breaker bar (no bigger than mine) the nut virtually fell off as if fingertight! Mate called me a puff! Damn thing must have been loosened with all my efforts, should have just tried it one more time. He took a good 15 minutes to get the front off though as he spent ages with the big air impact wrench to no avail. He ended up making a little shield out of some sheet steel to protect surrounding area and out come the welding bottles and a good bit of heat applied to the nut and a few second with the impact wrench had the nut off. Both nuts undamaged as well which was nice!