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Author Topic: Clutch Master Cylinder  (Read 311 times)

truck11

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Clutch Master Cylinder
« on: March 16, 2015, 01:34:23 pm »
So in my hast on Sunday, I stripped the threads in the clutch master cylinder mounting hole.  Bonehead move.       
Any thoughts on either tapping it to an M7 thread, or just drill through and using a longer bolt and locking nut?
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2014 690 Enduro R

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Rusty Shovel

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Re: Clutch Master Cylinder
« Reply #1 on: March 16, 2015, 10:58:48 pm »
That sucks.  Do what I'd do:



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Guymcfly

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Re: Clutch Master Cylinder
« Reply #2 on: April 22, 2015, 09:08:11 am »
Do you have enough metal to tap a new bigger thread? Or to use a helicoil?
Failing that you might have some luck using liquid steel ( I think it's JB Weld in U.S. ) and re cutting the original thread.
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truck11

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Re: Clutch Master Cylinder
« Reply #3 on: April 22, 2015, 09:38:15 am »
There is enough meat to re-tap to an M7.  But let me tell you how much of a pain in the butt finding an M7 hex head bolt was.   Fastenal didn't have anything, hardware stores had nothing - I came across McMaster & Carr  (http://www.mcmaster.com/)...  $3 bolt plus another $8 or $9 for shipping!!!  ugh. (I got 3 bolts!)
M8 was too big and the M7 is not a widely used size apparently, so not readily available.

Due to the design of the master cylinder (shape and contours), you can't simply drill all the way through and just use a nut and bolt.  I managed to retap for the M7 bolt from McMaster-Carr.  It's not stainless though :-(     so far so good after running 2 days of hard trails in WV 2 weeks ago.
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Guymcfly

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Re: Clutch Master Cylinder
« Reply #4 on: April 23, 2015, 12:52:52 am »
That's good. Price sucks tho. Maybe some marine grade anti seize would stop it corroding into place? Just thinking out loud on this...

Glad you got it sorted out.
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