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Author Topic: Sprocket bolts.  (Read 728 times)

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Offline Lost and Confused

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Sprocket bolts.
« on: November 14, 2012, 09:17:56 AM »
As I restore my '74 , I would like to know what thread angle the 12mm bolts have that attach  the sprocket to the hub. I'd like to use a acorn nuts instead. I think they're either 1.25, 1.50, 1.75?


Thanks for any help.
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Offline markb

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Re: Sprocket bolts.
« Reply #1 on: November 14, 2012, 10:21:14 AM »
I think you're asking about the thread pitch which is 1.25.
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Offline Grabcon

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Re: Sprocket bolts.
« Reply #2 on: November 15, 2012, 06:37:57 PM »
Metric thread gages are available on eBay for under 10 bucks. Every tool box should have at least one. They are very handy and any kid can use one.
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Offline 70CB750

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Re: Sprocket bolts.
« Reply #3 on: November 16, 2012, 03:40:56 AM »
All you need is a good caliper for that.  First measure the diameter, than imprint the thread to a piece of paper and measure the distance between 5 threads.  Divide by 4 and there you have it. 
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Offline Toxic

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Re: Sprocket bolts.
« Reply #4 on: November 16, 2012, 04:04:27 AM »
Since no one has asked .... I will
Are you sure you will have clearance with these taller Acorn nuts?

I didn't ... but then maybe my nuts are bigger than your's.  Seriously though,  I tried putting on these nuts and they would hit the swingarm's side at the front.  The acorn nuts I found were a good 1/3" longer than the stockers.
If I moved the rear wheel all the way to the utmost rear position of it's available travel they would just clear.

No way I wanted to run with the chain already at it's max length just to be able to use these acorn nuts.

Just a thought, you might want to check.  Just buy one and try it.


If I remember correctly these were pretty expensive nuts

Gary
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