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Cylinder head bolts

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Cylinder head bolts

Posted by william_youngson at February 16. 2017

Hi, I need to clean out the threads in my 72 750 cylinder barrel, the ones for the 4 bolts beside the spark plugs and the one front centre. Can anyone tell me what the threads are so I can buy a set of taps. Cheers. Billy.

Re: Cylinder head bolts

Posted by christopher_winsby at February 16. 2017

If you just want to clean out threads file a v into an old bolt turning it into a chasser. You can then clean out the threads with it without removing any material. You can then fit new bolts.

Re: Cylinder head bolts

Posted by Fritz Wettstein at February 16. 2017

… deleted by the author

Re: Cylinder head bolts

Posted by Andrew Heathwood at February 16. 2017

Hello there William

The bolts are part nos. 06.0401 (4 long ones) and 06.7918 (single short one).

I've checked this reference:

http://www.rgmnorton.co.uk/csi/1245184/f/pdf/cylinder_head_kit_notes.pdf

And this one  http://stainlessbits.com/link12a.html  for 06-0401

The bolts are 3/8" x 26tpi CEI or BSC (BSCy) threads.

Hope this helps

Andy

Re: Cylinder head bolts

Posted by Fritz Wettstein at February 17. 2017

Previously Andrew Heathwood wrote:

…The bolts are 3/8" x 26tpi CEI or BSC (BSCy) threads…


You're rigth Andy, I'm sorry.

Fritz

Re: Cylinder head bolts

Posted by Andrew Heathwood at February 17. 2017

Hey Fritz

No problem. It is just a bit frustrating that this information is out there but doesn't seem to be readily available on the NOC site. Ho hum...

Andy

Re: Cylinder head bolts

Posted by Fritz Wettstein at February 17. 2017

Previously Andrew Heathwood wrote:

Hey Fritz

No problem. It is just a bit frustrating that this information is out there but doesn't seem to be readily available on the NOC site. Ho hum...

Andy

It isn't already on the net. I.e. Icouldn't find it with «Google».

Fritz

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