Valve and valve guide numbers

Hi guys, I have ex valve with a 06-7570 part number on and a in valve with a made in england V263 on. I also have a in valve guide with G454 at least i think its intake guide. Do any of you guys have some kind chart to tell me number is for what ? I got a parts lot off ebay with two new intake vavles marked V240 and one new ex vavle marked james made in england G381OKE it has a grove in the fase of the vavle thay dont look like NORTON vavles to me unless early NORTON vavles. Thanks for any input Phil

The V numbers at least fit the Alpha Bearings part numbers, their catalogue is here

http://www.alpha-bearings.com/Valve%20cat/valvehp.htm

Thanks kommando, Thats exactly what i was looking for. Phil

It's interesting that the Alpha catalog lists the same number for 750 and 850 guides. 850 guides are much thicker than 750 guides. You can bore a 750 head for 850 guides, but you can never fit 750 guides in an 850 head.

Thanks Ron I see the year For 750 runs from 72 to 74 Im not aware of a 74 750. My 850 is titled 74 but has a born on date of 10-73 and has an RH10 head.Would that head take a G454 guide ? My 72 combat has a C on the head but no RH3. Would that head take a G454 guide ? I have new vavles and guides From a parts lot got vavles V# and guides G#. Do you know of a list thats a little more explanatory ? Thanks for any help Phil

The RH10 is an 850.
The C head is a combat (10:1 compression) 750

As RennieK says, the RH10 is an 850 head which takes the large guide (G547 intake, G548 exhaust). A Combat or any 750 head will take the smaller guides (G454 intake, G453 exhaust). An exception would be a few RH6 750 heads that had 850 guides. These were designated RH6S.

As to valves, 750 and 850 Commando valves are dimensionally identical, with a change to stellite tips in '72. Atlas valves are shorter or longer (can't remember which).

I confused myself when looking at that Alpha list. The guide numbers are correct, it was the model year overlap that got me.

Thanks RennieK and RonL for the help. I can never learn to much Phil