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Messages - JulianS

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The Star and Garter / Re: Rocket Gold Star inner primary chain case
« on: 01 October, 2017, 19:05:16 »
If you want to buy an RGS then the main thing is research and more research and when viewing to see a detailed and verifiable history including a dating certificate.

Dont rely on  photos in the current classic press of newly restored bikes, research contemporary photos.

And remember that only 1582 were produced. Of those perhaps half were exported to the USA, where they were either sold as scramblers or  Gold Star twins (not RGS) with twin pipes, so maybe only around 700 or 800 or so are real genuine UK market Rocket Gold Stars.

With such a low production run maybe there is no definitive answer or record as to exactly which parts were fitted.

Twins / Re: A65 Camshaft
« on: 01 October, 2017, 17:03:41 »
There will be a casting number on the head somewhere around the rocker spindle mounts.

Post some photos they might help us identify the head.

The inlets changed for 1966 but you can trace the different numbers through the parts books same with the spring seats.

Singles / Re: b40 amal carb
« on: 01 October, 2017, 16:45:32 »
Just measure the bore - same basic 376 body came with different choke sizes.

Singles / Re: b40 amal carb
« on: 01 October, 2017, 13:50:05 »
If carb is good condition - especially fit of slide in body- with the right jets and slide you will probably be able to adjust it to deal with the smaller bore.

Singles / Re: b40 amal carb
« on: 01 October, 2017, 10:12:20 »
The 376/231 is a 1 inch bore carb (376/253 1 1/16 bore) originally fitted to a Francis Barnett Falcon 87 200cc 2 stroke. The 2 stroke carbs usually have a different spray tube to the 4 stroke ones - look through the bore you see a brass tube protruding rom below. 4 stroke usually cut straight across the top and 2 stroke usually cut at an angle.

If yours is like that it may explain rough running.

Singles / Re: Next problem for the c11
« on: 30 September, 2017, 19:46:01 »
You can check if your registration is on DVLA data base with this link;

If not you can check if the records for the issuing authority still exist using this link;

If the records still exist and they can link the registration with the frame number you may be able, with further research, to apply to retain the number with above links from BSAOC.

If Records do not exist or they do but cannot link frame number (and most do not) then you can apply for an age related plate again see BSAOC links above.

Twins / Re: A65 Camshaft
« on: 30 September, 2017, 14:24:32 »
Only if you use the matching collets. See service bulletin below.

Twins / Re: A65 Camshaft
« on: 30 September, 2017, 11:41:52 »
68 473 is the standard cam for the A65 Thunderbolt, Lightning Spitfire etc.

The A50 Royal Star and some pre 1966 A65 were fitted with cam 68 103.

Cam 67 356 will not fit an A50 or A65.

Singles / Re: Victor Special Tank
« on: 30 September, 2017, 10:44:37 »
Would have though the steel tank from 1969 or 1970 Starfire or B44 Shooting Star would fit.

Twins / Re: A65l gearbox driven speedo
« on: 29 September, 2017, 20:12:05 »

I have sent you a PM please check under "my messages" at top of screen.


Twins / Re: A65l gearbox driven speedo
« on: 29 September, 2017, 16:21:21 »
Am I correct in reading the engine number as A65L 15521?

Twins / Re: A65 OIF Front brake.
« on: 29 September, 2017, 11:39:32 »
The gaiter was replaced by the spring very early in the 1971 production season.

See factory service bulletins below, which also gives the part number for spring.

Singles / Re: B31 Small end bush
« on: 28 September, 2017, 17:37:34 »
Small end bush is a press fit in the rod eye and will need very careful reaming or honing to suit the gudgeon pin.

The outside diameter should not need finishing before fitting.

Use a good quality sharp expanding reamer and take a small amount of metal with each cut, trying the pin each time.

The old Alpha bearings catalogues list small end bush dimensions, the B31 B33 bush is SE13 on the list with dimensions in the photo.

Singles / Re: b44 speedo
« on: 28 September, 2017, 16:52:23 »
I expect that someone has pulled out the reset knob and lost it.

New ones easily available, should just push in the hole in the side of instrument, it should click into place.

To reset just revolve it dont pull it as on chronometrics.

Twins / Re: A65l gearbox driven speedo
« on: 28 September, 2017, 12:48:21 »
Photos from second A65 parts book.

Is the engine a police engine or is it just the frame.

The speedo you have fitted needs to match the speedo driving and driven gears, different for chronometric and magnetic and the cable for chronometric and magnetic are also different and not interchangable

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