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SRM 750 #748373
09/08/18 4:49 pm
09/08/18 4:49 pm
Joined: Sep 2016
Posts: 207
Norway
M
Manx Offline OP
BritBike Forum member
Manx  Offline OP
BritBike Forum member
M
Joined: Sep 2016
Posts: 207
Norway
Fellas, what pitch thread are the head bolts on a SRM jug?

My bike started blowing from the head gasket and under inspection the studs are a tiny bit too long.

reading the instructions again it says that if you have a 70+ head that the studs should be shortend by 3mm, something I didn`t do because I actually didnt know I had such a late head..doh!

I have stripped the threads, so ne to fing the right size helicoil.

Cheers.


1966 Rickman Metisse (a65)
1960 A10 golden flash
1960 lambretta li150
1942 Ariel W/ng
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Re: SRM 750 [Re: Manx] #748459
09/09/18 5:21 am
09/09/18 5:21 am
Joined: May 2013
Posts: 4,952
Rotherham - S. Yorkshire
Allan Gill Offline

BritBike Forum member
Allan Gill  Offline

BritBike Forum member
Joined: May 2013
Posts: 4,952
Rotherham - S. Yorkshire
Do you have a thread gauge to measure the bolts? Factory barrels were 26tpi (from memory)


beerchug
Re: SRM 750 [Re: Allan Gill] #748640
09/10/18 5:45 pm
09/10/18 5:45 pm
Joined: Sep 2016
Posts: 207
Norway
M
Manx Offline OP
BritBike Forum member
Manx  Offline OP
BritBike Forum member
M
Joined: Sep 2016
Posts: 207
Norway
measured to 24 tpi and confirmed by SRM that its UNF


1966 Rickman Metisse (a65)
1960 A10 golden flash
1960 lambretta li150
1942 Ariel W/ng

Moderated by  Allan Gill, Jon W. Whitley 


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