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Messages - JulianS

Pages: 1 ... 4 5 [6] 7 8 ... 175
76
Singles / Re: Lucas MO1 magneto
« on: 29 September, 2023, 12:20:46 »
The slip ring spaces the bearings so you need to leave it in to do that.

77
Singles / Re: Folding kickstart for a Plunger B31
« on: 29 September, 2023, 11:07:08 »
I thought that the rigid/plunger B and M series had a larger diameter kickstart shaft than the swinging arm A and B models so cannot see Draganfly 42 3037 fitting the plunger box?

78
HC means high compression pistons. Found on Rockets but also on USA specification iron head engines with high comp pistons such as the A10 Royal Tourist and A7 Flash.

HHC means high comp pistons plus high lift cam. Seen on Super Flash and Road Rocket engines when it means the 356 cam and A10 Spitfire and later Super Rocket engines when it means the 357 Spitfire cam.

79
Ask the owners for some provenance of the bikes. Keen owners would probaly have a dating certificate for the bike.

EA7 frames are from 1956 and 1957 season. So would not match with a DA10R engine. DA10R prefix started for the 1960 season in August 1959 with GA7 prefix frame.

Low DA10R engine could match with a low GA7 frame.

A DA10R stamping in the 13 thousands is dodgy and probably just a DA10 engine where a previous owner has stamped in the "R" to make a fake rocket number, the highest factory stamped DA10R numbers were in the 10 thousands.


80
Singles / Re: 1970 B25 speed
« on: 26 September, 2023, 08:39:28 »
I suggest check the number of teeth on the gearbox and rear wheel sprocket and compare with the standard numbers.

If the rear wheel has a 21 inch rim (18 inch from the factory) that will raise the gearing, could it be overgeared?  I wonder what else the previuos owner changed.

These engine like to rev.

I owned a 1968 Starfire, standard gearing and wheels, it certainly liked to rev and would show just over 80 on the speedometer on a good day.

81
Lightweights / Re: C15 charging system
« on: 20 September, 2023, 15:58:29 »
Are you using the correct 74mm diameter rotor with the new stator?

Earlier alternators used a 70mm rotor which wont work properly with the later stator.

82
Twins / Re: A10 head info reqd please.
« on: 12 September, 2023, 08:48:53 »
Lots of information on A10 heads here.

http://atlanticgreen.com/a10dph.htm

The earlier Road Rocket and Shooting Star heads had a detachable manifold for the single carb, around start of 1956 the head casting was changed to a cast in manifold for single carbs.

There were some after market manifolds made for the earlier heads to allow twin carbs to be used.

83
Twins / Re: Dynamo drive chain -1959 A10 GF
« on: 10 September, 2023, 11:31:06 »
The factory service sheets say use 1/4 pound of light grease.

84
The Star and Garter / Re: Dealership
« on: 08 September, 2023, 16:21:05 »
Stagg Motors in Newport.

G Kelleway (or Kellaway)  in Ryde.

No doubt more including small one man businesses.

85
The Star and Garter / Re: Paying for Machine Dating electronically
« on: 08 September, 2023, 12:07:58 »
Go to the Club website and download the dating request form which gives details of paying on line.

https://www.bsaownersclub.co.uk/machine-cert

86
Twins / Re: Monoblock Viton tipped valve
« on: 03 September, 2023, 21:41:20 »
Autocycle engineering list solid brass alcohol needles on ebay item  265099665159

They do fit the petrol seat.



87
Pre War / Re: Which Model is it ?
« on: 22 August, 2023, 12:38:57 »
I will send you a PM (peresonal message) with some information.

88
Singles / Re: C10l wiring diagram
« on: 21 August, 2023, 22:51:30 »
Yes please post a photo or photos it might help solve the issue.

89
Singles / Re: C10L wiring
« on: 21 August, 2023, 16:05:37 »
Scott the C10L is positive earth.

There is no regulator, just a rectifier which from what you sayis probably missing.

I did post 3 further wiring diagrams back on the 15th covering the earlier single switch circuits. In these the lighting and ignition switches are combined into one interconnected switch.

90
Pre War / Re: Which Model is it ?
« on: 19 August, 2023, 20:09:03 »
D12 engine prefix is for a 1936 model J36-12 V twin.

The top frame member is a substantial forging look on the left side in the area near the seat position for the frame number.

J12 models frame numbers also started D12.

If the bike was originally exported to Austria in may have gone to Vienna dealer called Hirschl.

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