Triumph Rat Motorcycle Forums banner

1 - 6 of 6 Posts

·
Registered
Joined
·
13 Posts
Discussion Starter #1
Hi guys,what size are the threads on a 1969 Bonneville ser# BC 120XX,big end threads on the inlet manifolds that go into the head?

Thanks
 

·
Registered
Joined
·
13 Posts
Discussion Starter #4
I've looked and can't find one,can anybody suggest where to find a tap and die of this size?
Thanks
 

·
Premium Member
Joined
·
4,721 Posts
1-3/8" American National 16 Series thread.
It's not really common.
Wholesale Tool Company have a tap advertised for $95 cheap ("special threaded hand taps WT",page 6) and 2-1/2" button die (currently in stock,listed under "dies" then "2-1/2" high speed special dies") for $37.
Do a Google-search;they have a website.

Quite cheap,I think.
 

·
Premium Member
Joined
·
9,562 Posts
given the price of the tool. and the time that the job takes, I'd imagine that unless you have a batch of heads, finding someone who can do it for you would be cheaper.
 
1 - 6 of 6 Posts
Top