Author Topic: Bloody Layshaft Nut  (Read 2396 times)

Offline Old Jock

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Bloody Layshaft Nut
« on: March 24, 2019, 11:35:58 AM »
So after having given up in complete disguist (for now) on the 1000 and why it won't hold oil pressure worth a candle, not to mention temperature

I decided the 1100 needed some love

Went back and assembled the relined barrels, new piston rings and cleaned up pistons, a lot of apprehension but the rings went in (eventually) and the engine isn't siezed solid (always a bonus).

The engine is now back together, complete with new valves and guides into the bargain

One more job to do and that was see if I could retrieve the bottom thrust washer on the speedo drive at the back of the gearbox as it never came out with the rest of the assembly. I've gone to Speedhut gauges and have a pickup off the rear caliper support bracket.

Easy peasy, well not exaclty, bloody layshaft nut decided to form a lifelong friendship with the shaft. So lots of hauling later the rattle gun came out and promptly stripped the hex of the Aluinum nut in record time. BLOODY MARVELOUS!!!

2 days on and off with a Dremel and a routing attachment, followed by lots and lots of hammering and the fruits of my labours lie below.

You can see where the rattle gun has efficiently removed the hex, the remaining bit of hex left was under the worm drive so totally inaccesable

 



The threads on the layshaft look Ok, much to my surprise, now I understand why the nut was made of Aluminum and the layshaft is steel. Oh I managed to Dremel it off by placing the Dremel up one of the channels in the Layshaft so as I could cut the nut but not destroy the threads and much to my surprise it appears to have worked (famous last words)

Wonder what's ready to bite me in the a**e next
« Last Edit: March 24, 2019, 11:42:24 AM by Old Jock »

Offline Rolf Halvorsen

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Re: Bloody Layshaft Nut
« Reply #1 on: March 24, 2019, 12:14:44 PM »
The nut is of steel.

Offline Rolf Halvorsen

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Re: Bloody Layshaft Nut
« Reply #2 on: March 24, 2019, 12:17:25 PM »
Use a long 27mm 6-corners pipe.

Cut the pipe of in the front so that it enters the nut as good as possible. New pipes are nut entering the low nut in a good way.

Rolf

Offline Wayne Orwig

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Re: Bloody Layshaft Nut
« Reply #3 on: March 24, 2019, 12:27:09 PM »
I had to modify a deep socket to get a better bite on the nut.
Trust me, if it comes loose, that is a bigger problem.
Good judgement comes from experience.
And experience. That comes from poor judgement.

Offline Old Jock

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Re: Bloody Layshaft Nut
« Reply #4 on: March 24, 2019, 12:36:25 PM »
Ok Rolf

I thought the nut was Aluminum, if it is steel then it's of a lower grade hardness than the shaft for sure as the dremel router went through most of it very easily. It's is also lighter than what I expected a Steel nut to be, but you are the expert and I'll bow to that

I was using your impact socket so I have no complaints there either, it does a great job, I was just unlucky, stupid or both

Anyway it's off now and I'm much relieved that I'm not perparing to drop engine and gearbox out the bike which would have been more that I could take right now.

Hi Wayne, I remeber Pete warning me what can happen if the nut comes loose in service as I remember both the cluchshaft and layshaft nuts are in turn responsible for positioning their respective shafts in the box.

If either went for a stroll it would not end well


czakky82

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Re: Bloody Layshaft Nut
« Reply #5 on: March 24, 2019, 02:26:31 PM »
I just went through the same thing but threw one last hail mary with the rattle gun and she cooperated.

@Wayne- that is very true!

Offline Old Jock

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Re: Bloody Layshaft Nut
« Reply #6 on: April 10, 2019, 03:35:42 AM »
Just closing this out

I got a new nut (well 2, so as I have a spare) from Teo Lamer (Thanks Rolf) and a close inspection of the threads did reveal some minor damage to the threads where I slotted the nut to weaken it

New nut went on with no problem, got the rattle gun out and tightened it up. Didn't go crazy just a short burst, the gun is pretty powerful.

All on and seems fine, so I'm now just assembling the swinging arms (Magni so there are 4 pieces to assemble). So far so good but the bevel box piece of the arm is a bit of a sod to get into position but I now came up with a method to get it on that's a bit easier than previously.

Just got the back wheel left to do, fingers crossed...…………………..what a relief

John

twowings

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Re: Bloody Layshaft Nut
« Reply #7 on: April 10, 2019, 03:51:39 AM »
Hang in there!  :thumb:

Offline John Croucher

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Re: Bloody Layshaft Nut
« Reply #8 on: April 10, 2019, 08:32:49 AM »
I installed an electric speedometer.  Removed the speedo drive out of the top the transmission and replaced with the appropriate size oil pan plug I picked up at the auto parts store. 

Offline Rick in WNY

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Re: Bloody Layshaft Nut
« Reply #9 on: April 10, 2019, 08:48:48 AM »
Easy way to check that nut... grab a magnet. Steel will stick, aluminum won't.

Glad you got it out!
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