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Messages - JulianS

Pages: 1 ... 5 6 [7] 8 9 ... 63
Which BSA do you ride? / Re: New member, 1955 Bantam Major
« on: 29 April, 2018, 09:38:27 »
I have used "Chronometrics" for speedo and tachometer on my A10 and very pleased with the service;

Pre War / Re: 350cc Blue Star clutch woes
« on: 28 April, 2018, 17:13:03 »
Les when assembling the clutch first on is a back plate (15 294), next a friction disc, next the chainwheel then the rest of the plates including the other friction discs.

So the 6th plate is behind the chainwheel which should be recessed to accept it and the backlate.

Twins / Re: UK Registration forms etc
« on: 27 April, 2018, 20:35:09 »

Singles / Re: B40 Alpha main bearing conversion
« on: 27 April, 2018, 16:32:34 »
It is sometimes used on a bearing which has spun in the case.

Singles / Re: B40 Alpha main bearing conversion
« on: 27 April, 2018, 15:23:06 »
Sometimes an outer will contract just a bit too much if loctite has been applied too thickly to the bearing/case.

Singles / Re: B40 Alpha main bearing conversion
« on: 27 April, 2018, 14:29:39 »
Fitted this conversion to a 1961 B40 some years ago. Outer sleeve contracted when fitted to crankcase so that the crank and rollers would not fit. Took to my local bike dealer who honed the out so it all fitted.

Twins / Re: A10 - Wheel rebuilds
« on: 26 April, 2018, 22:30:31 »
My A10 has had Devon stainless rims the last 6 years. Very good quality no problems encountered with them.

Twins / Re: A10 - Wheel rebuilds
« on: 26 April, 2018, 09:40:58 »
The iron full width hubs with all straight pull spokes (not the A65 type with verticle flange) are built centre of rim to centre of hub. Mine are built with 8/10 butted spokes.

Twins / Re: A65 engine
« on: 24 April, 2018, 22:37:22 »
The cranks were changed to just one plug from 1964.

Service sheet 112 introduced the change. Other changes came later.

Singles / Re: C15 cam and gearbox bushes
« on: 24 April, 2018, 18:50:35 »
If the bike is distributor model than the gear shaft bushes are quite difficult - the clutch end bush is blind as is the bush in the kickstart quadrant on the other end so you cannot line ream. You may find that the clutch end bush is the right size when fitted.

The mainshaft sleeve gear bush is, if I remember correctly, larger diameter than the inner cover bush, making line reaming difficult.

So the advice to take to a proper engineering shop is good advice.

Singles / Re: Carb - gaskets/sealing
« on: 24 April, 2018, 16:53:07 »
Without the O ring surfaces need to be really good to give an airtight seal.

I would avoid a rubber spacer and use a tufnol or similar hard spacer.

Float bowl gasket does not need grease, they self seal to a certain extent - on removal you may see where the gasket has sealed on bowl or carb body.

Twins / Re: Useless Choke Cable
« on: 24 April, 2018, 15:15:36 »
Should be no problem with it removed, flood on tickler if it needs it.

Used my A10 without a choke for years, though I have now refitted one.

I suggest screw a blanking plug in the carb top when cable removed.

Singles / Re: B40 Fork Bushes
« on: 24 April, 2018, 09:26:10 »
The other point about new pattern or new old stock bushes is that they cannot compensate for over 50 years wear in the shafts and the fork bottoms. The fork assembly needs to be considered as complete assembly and worn parts replaced or refurbished.

Singles / Re: B40 Fork Bushes
« on: 23 April, 2018, 15:55:41 »
I would not use brass, use a phosphor bronze. If you do make your own the outside diameter of the top bush is specified as slightly greater than the lower to be a light push fit in the fork bottom, otherwise you may get movement between top bush and fork bottom tube  as well as movement between bush and fork shaft.

Also depends on what it is and where it is. Looks like a Gold Star but is it?

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