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Messages - ANDY HIGHAM

Pages: 1 [2] 3 4
16
Singles / Re: B31 Magneto oil seal
« on: 22 October, 2017, 13:00:58 »
You may need shims to ensure correct mesh between idler gear and magneto gears

17
Singles / Re: B31 Magneto oil seal
« on: 19 October, 2017, 21:31:55 »
As the breather system is designed to keep crankcase pressure below atmospheric pressure, that would suggest the seal should be fitted spring out. I fitted mine spring in

18
Singles / Re: B44, Bigend, Piston. Bad vibration.
« on: 17 October, 2017, 18:16:12 »
Not quite. The piston assembly and the top part of the rod is reciprocating mass, the lower part of the rod is rotating mass. Also, is 58% correct or just what was thought to be correct 50 years ago?

19
Singles / Re: B44, Bigend, Piston. Bad vibration.
« on: 13 October, 2017, 16:27:11 »
There is no reason why a B44 should vibrate badly.
Don't assume BSA correctly balanced the crank, they probably balanced the prototype then made all the production ones "similar"
My B31 (400cc) crank/rod/piston assembly was balanced by Phil Pearson and the bike is smooth as silk all the way to 80 + MPH

20
Singles / Re: B31 Manual Advance/retard
« on: 12 October, 2017, 14:47:49 »
How often do cables snap?
Most cable failures are either fraying through rust or incorrectly soldered nipples pulling off

I make my own cables using PTFE lined outer conduits. The inner wires are splayed before soldering and are soldered in a solder pot (about 15 off Ebay)
Most parts available here https://www.venhill.co.uk/

21
Singles / Re: Stargazer
« on: 23 September, 2017, 13:09:12 »
Last weekend I took her to the British records meeting at Elvington. I thought it would be a good place to run it in and set the carburettor. I managed a best standing start mile speed of 84MPH

22
Singles / Re: B25 starting problem
« on: 18 September, 2017, 11:40:55 »
My bet is a blocked pilot jet

23
Singles / Re: BB32A
« on: 18 September, 2017, 11:39:35 »
As far as I know there is no such thing as a CB34 frame. All BSA frame designations were the smallest bike using that frame. B33s had a B31 frame No, A10s has an A7 frame No and B34s had a B32 frame No

24
Singles / Re: Advice wanted on choice of BSA model.
« on: 08 September, 2017, 20:51:38 »
If you chose a pre-unit single Phil Pearson does an electric start kit. If you chose a pre unit twin Steve McFarland does an electric start kit.
http://www.bsagoldstar.bike/electric-starter/
http://www.startyourbsa.com/

25
Singles / Stargazer
« on: 08 September, 2017, 20:46:48 »
Stargazer sees the light of day at last
20170908_145323 by Sigma Projects, on Flickr
20170908_145256 by Sigma Projects, on Flickr

26
Singles / Re: Front brake
« on: 21 August, 2017, 20:47:42 »
It's an alloy drum

28
Singles / Re: B31 help
« on: 28 July, 2017, 20:59:50 »
If the bore is gone past the maximum rebore size you can use a Triumph T140 piston, it is 76mm and gives a capacity of around 400cc

29
Singles / Re: Internal Incontinece
« on: 27 July, 2017, 21:38:11 »
Gear pumps are great at producing pressure not so good at sucking. A spring loaded valve between the tank and pump could starve the engine of oil, an on/off tap is easily forgotten with disasterous results. BSA fitted an anti wet sumping valve, if it's not working find out why and repair it rather than a risky botch job

30
Singles / Re: B33 Gearbox casing clutch Arm grease nipple
« on: 22 July, 2017, 21:11:10 »
The grease nipple is largely useless, plenty oil works its way up the shaft and a dribble usually escapes out of the top

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