Topic: What have we here? Frame/Engine numbers included.

[SteveD CB500F]

A new member on the UK site ( www.honda-sohc.co.uk ) has been given a CB750 in bits but no seat, tank, fairing etc. Only the engine, frame and wheels. Apparently it is the remains of a Phil Read Replica.

Frame: CB750G-1013952
Engine: CB750E-2468187

A quick look at the tech library indicates that the engine is a K6 (?), but there is no reference to the CB750G frame numbers.

The PRR was a tarted up F2 in the UK so I suspect that it isn't one.

[SteveD CB500F]

Update:

The frame has a rear disk so definitely an F

[bryanj]

Some years back I asked Dave Silver what the "G" meant and was told it was supposed to be a UK model but since I have heard that Australians had the same model. F2 of course has the comstars and the different front calipers

Only ID book is the US one and that doesnt list it.

Only way to check on engine is pull it and inspect the bits for differences, obvious one is F2 should be black and piston shape/valve size.

You can always pay Honda for a dating letter if he didnt get a V5.

I'm off line from now till the new house gets a phone line but you got my number if you want to call

[750goes]

I thought I read/heard somewhere the "G" in the frame number stood for "General Export" - and they went to various countries...could be mistaken though....

just a thought - I'll make a bold statement

K series bikes have "E" frame numbers
early F series bikes have "F" frame numbers
F2 series bikes have "G" frame numbers
late K models  - unsure of frame identifiers?

does this sound plausible.....??

[SteveD CB500F]

Plausible, yes.

I've just had a conversation with my local 750 guru who says that the F1 used CB750F- and the F2 used CB750G- (as G comes after F)

So, could well be an F2 frame, which would be correct. But the K engine is a bit of a disappointment.

[Sam Green Racing]

Steve, my F2 shows CB750F 1025***   

Sam.

[scondon]

   

     Steve, the F2 frames are missing the "loop" at the rear just above the swingarm. I think the passenger pegs hang on this loop on earlier F and K model bikes. Usually easy enough to "see" the difference between early and late F frames if you look for this feature. I also recall the "G" being on late F model frames, mostly in Australia.

   Maybe there's something nice hidden inside that K6 motor?

[Clyde]

The 750G means that it is an F2. The 'G' apparently was not used in the US, but was used elsewhere including Australia and the UK.
According to my records from parts lists, publications etc,it is an early 1977 F2.
The engine is a K6 as identified.
I do not see a problem with that combination -should make a very good bike to ride.
My F1 (Frame plate is 05/1976) is CB750F-1031693. Engine Number CB750E-2528457
My K2 (late 1972 but probably a 73 model) is CB750-2076130 (no F,E or G) Engine Number CB750E-2237221 (it is the original engine that came from Honda as I have its history-thus it is probably a 73 K2. In Australia and other parts of the world Honda kept on producing the K2 but used the later engine numbers)

[jtb]

The E is an engine number.  (CB750E ).  My F2 (1977, made in April 77) is CB750F-210832.  As far as I know, there is no letter on the K model.  (CB750-z...)

[Dewayne]

I bought a 1972 Honda CB750 with a clean title and when I had it inspected with the state we found that the numbers were scratched off the VIN plate. I noticed that the title was using a number imprinted on the frame. It appears to have mostly original 72 parts, anyone know why someone would scratch off the engine VIN plate?

I a new to the Honda CB750 so any help is much appreciated. Thank you.