Hello all, I've a 1957 West coast A10 Spitfire that I would describe as a reproduction rather than original, although it does have many of the original parts as confirmed by Magnetoman's excellent detailed thread on this specific model and it did come with a US title dated 1966 with corresponding Spitfire serial numbers.
The question is, should the Catalina fuel tank have a vent tube or not? The attached Hap Alzina sales brochure of the day suggest not but MMs illustrations suggest it should have. Also should the colour be red or Silver? Again period black and white illustrations suggest it could be either, dependant on it being west coast or east. My tank is a indian reproduction in red with a vent pipe and I've a feeling it should be silver without a vent.
Finally I've just noticed on the Hap Alzina sales brochure that the 1957 Super Rocket came with an 'extra heavy' crankshaft. Does anybody know if this was also fitted to the Spitfire? Many thanks Jim
Thanks for that. I've just come across the attached service bulletin from a BSAOC member which indicates that they were used on the very first Scrambles Rockets (SR) up to CA10 SR231. I wonder if magnetoman has picked up on this with his. Cheers
the attached service bulletin ... indicates that they were used on the very first Scrambles Rockets (SR) up to CA10 SR231. I wonder if magnetoman has picked up on this with his.
I haven't commented on your questions because I don't know anything about 1957 Spitfires beyond that contained in my restoration thread.. However, thanks for pointing out that Service Bulletin. Although I hadn't posted it because it doesn't apply to my bike -- note: it applies after engine no. 232, not to the very first ones -- I've now added it to an appropriate page of my restoration thread.
Is it not the same crank that was fitted to all the later a10’s?
Originally Posted by Servodyne
In a word no.
BSA Parts Service Bulletin G.A.2 dated July 1957 says in the interests of standardization a new crankshaft has been fitted to standard, Super Rocket, Standard Rocket, and Scrambles Rocket A10s, with the part numbers for the old and new crankshaft and flywheel assemblies:
Old A10 Std: 67-774 Old A10 RR: 67-1149 New Part no. 67-1216
Catalogs MC991-2 (no date) and MC1009-2-2 (reprinted April 1958) both cover 1954-1957 A10s including Road Rockets. Both give 67-1216 as the part number of the Road Rocket assembly, but 67-663 for the standard A10 (for the standard A10 the part no. includes the rods).
Catalog 1009-3-3 covers Super Rockets from engine CA10R-6001, which was 1958. It gives 67-1216 as the part number for the A10 and A10 Super Rocket.
Since catalogs are updated to include the specifications at the time of printing, short-lived intermediate part numbers that were superseded can be missed. In this case it appears that crankshaft assembly 67-1149 shown in Servodyne's previous post was just such a short-lived item.
Interestingly, thanks to Servodyne we now know crankshaft 67-1149 was superseded sometime during the 1957 model year[*] but the part number does not show up in the 1959, 1962, or 1963 Master Priced Lists (which include superseded parts). However, it does show up in 1965 (and 1970) with the comment to use 67-1216.
[*] Bulletin G.A.2. says "Scrambles Rocket" after engine CA10SR.231 were fitted with the new crankshaft, and that bike was despatched 5 May 1957.