engine numbers

Status
Not open for further replies.
J

jmbreen2

Joined
Aug 25, 2011
Messages
9
I believe the bike I just bought has matching frame and engine numbers,I verified they both match.
I'm told buy someone that has worked on Nortons for years that the engine number should have a 0 with 2 lines thru it before and after the engine number, which mine does not have. Any input is appreciated.
thanks
JMB
 
Never heard of a 0 with 2 lines through it, but then there are a lot of things I haven't heard. Mine doesn't either.

Dave
69S
 
Late model Commandos have a symbol that LOOKS like a zero with two horizontal lines through it; one each before and after the serial number.

Early ones 20 series stamped around the curve of the cylinder base, and early models using the raised pad, don't have those symbols, from what I've seen.
 
Actually it's a circle with three horizontal lines (Triumph used them too, see below) which prevented anyone stamping any extra digits, however as grandpaul has said those limit stamps were not used on early Commandos.


engine numbers
 
jmbreen2 said:
the bike is a 1973, sorry I left that out
Click to expand...

I'm not sure exactly when the limit stamps were first used? I think it was sometime during 1973 or '74, so I doubt there's anything wrong with your Commando's numbers.
 
My 7/74 850 dosn't have them. I think they started on the e-starts. I could be wrong.
 
It is what's in the middle that counts. The frame at the neck, the numbers between the symbols and across the top of the gearbox along the casting where the long bolt goes through. All three will indicate a matching numbers unit.
 
Status
Not open for further replies.

Similar threads

S
Engine Numbers
Replies
3
Views
253
Stephen Hill
S
D
At what engine number was the starter motor position (behind the barrel) introduced on the 750?
2
Replies
22
Views
1,061
batrider
batrider
Denis J
Understanding the date range of serial numbers - What is the model year?
2
Replies
26
Views
1,390
L.A.B.
L.A.B.
tribonnie
P11 engine number
Replies
3
Views
309
tribonnie
tribonnie
D
1974 serial number question
Replies
5
Views
376
Time Warp
Time Warp
Back
Top