Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - JulianS

Pages: [1] 2 3 ... 87
Twins / Re: A10 gearbox clutch mainshaft thread size?
« on: 16 March, 2019, 19:35:24 »
The A10 gearbox mainshaft thread is 5/8 x 20 tpi BS cycle.

The A65 used a 9/16 x 20 tpi.

BSA did not use Admiralty threads on the A10.

I think you need to source another nut but from a different source.

It is possible that the new nut is wrongly made - how close would a 16mm x 1.25 thread appear to the 5/8 x 20 tpi?

Will send you a PM

Singles / Re: 1958 C15 factory colours
« on: 14 March, 2019, 09:16:00 »
1965 C15 Star colours were listed as Royal Red, Sapphire Blue or black.

Twins / Re: A65 Gear Change Quadrant
« on: 13 March, 2019, 20:43:25 »
Below is from the 1969 parts book and shows a sketch of quadrant 68 3294, the 1966/67/68 books have a different sketch which looks like the earlier part 68 3098.

Apart from the larger diameter where it goes through the inner cover the stop plate locates on machined flats and is secured by a grub screw.

The earlier stop plate is located by a key and secured by a grub screw.

Given the difference in diameter you could not  mix the early and later parts.

Singles / Re: B40 wiring diagram
« on: 13 March, 2019, 10:40:19 »
This is from the Lucas service manual. Not an easy loom, you need to trace the alternator output Green/Yellow cable via the ignition and lighting switch in  the different switch positions, until it gets back to the rectifier.

With the riginal 6 volt system, with no voltage regulator in circuit, the lighting switch is also a charging switch to crudely control the alternator output.

With ignition "on" the green/yellow a/c output enters ignition switch at terminal 17 and leaves at terminal 18 as black and goes to lighting switch terminal 5. With headlight "on" it emerges from terminal 7 as green/black to the rectifier giving full alternator output.

Following the wiring in different switch positions will show how the output is reduced by the internal connections.

A 6 volt system with a proper regulator and a 12 volt system dont need the coil switching to control output.

Twins / Re: A10 Swinging Arm bushes
« on: 12 March, 2019, 19:11:32 »
Bought my A10 in 1973. During a rebuild in 1992 I had the bushes replaced whether they needed it I dont know. 27 years on and many miles later no problems with the bushes or the handling. For me that is proof of a sound design.

Twins / Re: A65 Gear Change Quadrant
« on: 11 March, 2019, 20:19:19 »
I dont think they do. Different camplate also.

Lots of changes between 1965 season and 1966 season.

Singles / Re: 1958 C15 factory colours
« on: 11 March, 2019, 15:32:44 »
The 1959 season bikes, which were made from September 1958 were available in turquoise green and fuchsia red.

Catalogue pages below dated August 1958.

Your bike paint, it whatever colour you wish.

Singles / Re: B31 steering assembly
« on: 09 March, 2019, 19:49:27 »
The service bulletin and part of a page from parts book for 1954-57 may help explain.

Singles / Re: C15 Oil in frame ?
« on: 09 March, 2019, 15:56:01 »
441cc Victor Grand Prix. Very rare.

250cc B25ss Gold Star and B25T Victor  and a small number of OIF Fleetstar.

500cc B50.

Never heard of a C15 or a 350cc OIF.

Twins / Re: shooting star
« on: 06 March, 2019, 22:30:10 »
Cold oil does not flow very fast with the oil pipe off.

I had oil feed problems after an oil change, caused by an air lock between the crankcase union and the pump. It was necesssary to remove the timing cover and slacken the pump fixings to bleed the air out

Twins / Re: shooting star
« on: 06 March, 2019, 20:33:11 »
Undo the feed pipe at the crankcase union and let the oil flow from the tank then replace.

You could have an airlock.

You could use a pressure oil can to force oil into the union incase the airlock is between union and oil pump.

Singles / Re: c 11 clutch issues
« on: 06 March, 2019, 17:47:46 »
Clutch slipping?

make sure there is clearance between the pushrod and the adjuster inside the gearbox inspection cover.

Singles / Re: c 11 clutch issues
« on: 06 March, 2019, 16:40:21 »
Clutch pushord lengths given on the factory parts bulletin below.

Singles / Re: c 11 clutch issues
« on: 06 March, 2019, 14:54:05 »
Which gearbox fitted?

3 or 4 speed?

Pages: [1] 2 3 ... 87