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#553637 - 07/19/14 1:09 am Mainshaft Nut Backing Off  
Joined: Jun 2012
Posts: 17
stugs Offline
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stugs  Offline
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Joined: Jun 2012
Posts: 17
Monterey, CA

I have a TR25W basket case I finally finished getting back together. I took it for a test ride and about 5 minutes in the clutch ceased springing back.

I took the timing cover off and the mainshaft nut, which was new, had backed itself off and stripped some of the threads (of the nut). I did some searching and it appears lots of folks have recommended using loctite.

Before I pick up a new nut and get things back together tomorrow, I was curious if anyone had other suggestions.

Thanks,
matt

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#553657 - 07/19/14 4:30 am Re: Mainshaft Nut Backing Off [Re: stugs]  
Joined: Oct 2003
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dave jones Offline
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dave jones  Offline
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Joined: Oct 2003
Posts: 3,524
Emsworth, sunny south of Engla...
Did the clutch hub come off the taper on the mainshaft or did the centre slide on the hub? You can grind the hub to the centre or you can clean it and use a little powdered chalk dust to help the tapers grip. On mine I used some blue loctite 243 on the treads and torqued the nut to the figure in the manual.

dave

#553689 - 07/19/14 9:12 am Re: Mainshaft Nut Backing Off [Re: stugs]  
Joined: Dec 2004
Posts: 8,896
kommando Online content
kommando  Online Content


Joined: Dec 2004
Posts: 8,896
Scotland
The mainshaft under the timing cover should have a tab washer under the nut but loctite blue will suffice for now as long as you torque it correctly.

#553690 - 07/19/14 9:14 am Re: Mainshaft Nut Backing Off [Re: stugs]  
Joined: Mar 2005
Posts: 9,971
John Healy Online content
John Healy  Online Content



Joined: Mar 2005
Posts: 9,971
Boston, Massachusetts
And the threads were free of oil when the Loctite was applied.


#553725 - 07/19/14 1:51 pm Re: Mainshaft Nut Backing Off [Re: stugs]  
Joined: Jun 2012
Posts: 17
stugs Offline
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stugs  Offline
BritBike Forum member

Joined: Jun 2012
Posts: 17
Monterey, CA
Thanks all. I just installed a new nut + tab washer with loctite blue. Shakedown run #2 in 24hrs when this sets up.

matt


Moderated by  John Healy 


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