Frame Tapped Hole Sizes?

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blaat!
Posts: 252
Joined: Thu Aug 25, 2011 4:31 pm
Location: Massachusetts

Frame Tapped Hole Sizes?

Postby blaat! » Wed Nov 08, 2017 2:09 pm

Anybody know what size tap "A" and "B" are supposed to be? Seems like an M10 for both, but mine are not in great shape so it is hard to tell. When I thread an M10 in it is very loose. It could just be corrosion and wear over the years though.
Thanks.
Jim

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ranton_rambler
Posts: 442
Joined: Sun Jun 04, 2017 11:33 am
Location: Stafford UK

Re: Frame Tapped Hole Sizes?

Postby ranton_rambler » Wed Nov 08, 2017 3:07 pm

A and B are fine and normal pitch, but I can't remember which way round.

Eldert
Posts: 772
Joined: Sun Nov 01, 2009 3:23 pm
Location: Hazerswoude Rijndijk Netherlands

Re: Frame Tapped Hole Sizes?

Postby Eldert » Wed Nov 08, 2017 4:27 pm

both are 7 /16 unf .

Eldert

blaat!
Posts: 252
Joined: Thu Aug 25, 2011 4:31 pm
Location: Massachusetts

Re: Frame Tapped Hole Sizes?

Postby blaat! » Wed Nov 08, 2017 5:49 pm

WAIT, WHAT? They are not metric? That is madness. Thanks Eldert!

ducwiz
Posts: 604
Joined: Tue May 22, 2012 12:52 pm
Location: near Frankfurt, Germany

Re: Frame Tapped Hole Sizes?

Postby ducwiz » Wed Nov 08, 2017 6:25 pm

When I got my w/c 350D frame powder coated in 1982, I had to clean both threads for the footpeg after the processing. As I had no access to any "inched" taps then, I used a metric M11x1.25, which worked for me.

cheers Hans

Vintmoto
Posts: 43
Joined: Sat Apr 11, 2015 2:54 am

Re: Frame Tapped Hole Sizes?

Postby Vintmoto » Thu Nov 23, 2017 11:10 am

Yes, those and the rear set mounting lugs are the 7/16 unf size. Story goes that the factory got a good deal on foot pegs in that size. Who knows for sure.


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