I understand there are 2 lengths of Girder fork blades, but have not come across the actual lengths for them. Does anybody have the dimensions and can enlighten me? Need to know so I can figure out whether to use the spacer for the frond mudguard, it doesn't seem to fit the stays either way so will need some tweaking.
Vince

email (option): vinver@ns.sympatico.ca

Vince I have just measured two sets of standard forks. From the centre damper spindle to centre wheel spindle is 16 3/4". I gather the longer blades are 1/2" longer at this dimension. Ron

email (option): ronpier@talk21.com

I have reason to believe that the two sizes of forks can be attributed to the RAF contracts C10655 & C14052 of 1944. Total machines 509

Fork Number: 66-5020
Front Wheel Rim Number: (18 inch) 66-5594

Contract S1048 Total machines 15,000
Fork Number: 66-5015
Front Wheel Rim:(19 inch) 66-5482

Contract S7282
Fork Number: 66-5018
Front Wheel Rim:(19 inch) 66-5482

I wonder what the differences are between the forks?
And, how do you know which one is from what contract.

email (option): britool51@hotmail.com

Hi Robb

I think you need to look at your numbers again.

There are two different sets of fork legs 66-5014 and 66-5016.

66-5014 is the standard short 1939 civy fork leg also fitted on military contracts up to at least C6126 and the RAF contracts C10655 & C14052.

66-5016 is the longer military fork leg designed to give 1/2" extra ground clearence and first fitted around contract C9310, carried on until contract S7218 and I beleive was also used on postwar civy M20s.

I don't have access to more spares lists at the moment but the change would appear to have been in 1940/1.

Some fork legs have the part number stamped on them.

Rob.

email (option): robmiller11@yahoo.co.uk

These are the part numbers for the front fork blades taken from that years parts lists. I am not sure about the first two but the 66-5014 is the short version while the 66-5016 is the long one. The first two are probably also short.

Henk

1939 = 66-5023
1940 = 66-5010 Civilian
1940 = 66-5014 Military
1941 = ?
1942 = ?
1943 = 66-5016
1944 = 66-5016
1945 = 66-5016
1946 = 66-5016

email (option): ahum@quicknet.nl

Cool

Thanks Rob. I'm looking to get all the parts lists for each contract. Have you any to swap?

email (option): britool51@hotmail.com