Commando engine number.

I have a set of 750 crankcases numbered 235351 i cant place it based on the factory number system. Can anyone shed light on this. Could be a dodgy set.

There appear to be quite a few 750s without factory records....
see this > 850-vin-numbers-t12674.html

Hello all,

I have a small question, my Norton racer (slimline frame, custom swingarm) has a 850 engine ( seriously modified); could anyone enlighten me about its production year and exact type as I don't know where to access a production numbers database? My engine number is 304245.

Thank you very much in advance.

304245 will be a 1973 made 850cc Model, as a Mk 1.

There are other threads here about which carbs and head etc which will/could be fitted.
Although anything is possible in the past 40+ years...

Ta.

Rohan said:

304245 will be a 1973 made 850cc Model, as a Mk 1.

There are other threads here about which carbs and head etc which will/could be fitted.
Although anything is possible in the past 40+ years...

Click to expand...

Thank you, Rohan!

Well, the engine has been modded quite a bit...the crankshaft has been seriously lightened/balanced, the camshaft was a Dunstall fast road when I first got the engine, but I replaced it with a PW3, it has seriously lightened and polished rockers, Black Diamond valves with special springs,polished rods etc.
RH4 ported heads.

I run the engine with2 932 Amal concentrics, KN filters and Dunstall exhausts. My main jets are 290...
The bike is pulling like a (very fast) train!
:mrgreen:

My engine number is 304217. So pretty close to yours, and it was built in May 1973.

Jagbruno said:

Hello all,

I have a small question, my Norton racer (slimline frame, custom swingarm) has a 850 engine ( seriously modified); could anyone enlighten me about its production year and exact type as I don't know where to access a production numbers database? My engine number is 304245.

Thank you very much in advance.

Click to expand...

Great looking Norton, looks very light. Where did you get the fairing, swing-arm?
I bet it surprises some more modern bikes on some twisty back roads. Any good stories? Ducatis in a ditch etc.?
It looks like a MK111 front brake. I think some 750's came with 932's. I put a set of re-sleeved 932's on my '68, with a bit of modification on the intake manifolds. It runs well with them.

MF