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Messages - JulianS

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Singles / Re: 71 Starfire TLS front brake adjustment!
« on: 25 May, 2018, 20:59:39 »
Possible someone put a cable for an 8 inch TLS on it.

Contrary to what you have been told these brakes are excellent, light and powerful and by far the best of the BSA drum brake.

Below from the 1969/70 workshop manual detailing how to adjust the tie rod.

Singles / Re: 1964 BSA C15 Scrambler
« on: 25 May, 2018, 18:20:40 »
There was a change in the distributor in 1963. From 15 degree to 10 degree.

But in the past 54 years it could well have been changed.

The service sheet gives some detail, though I would not use the retarded timing figure they give.

It has, helpfully, had the Lucas part numbers added.

Singles / Re: 71 Starfire TLS front brake adjustment!
« on: 25 May, 2018, 18:13:10 »
The 3 arm method is difficult - the shoes slide so may not both be in the best position.

Turn the plate over and adjust the rod so that the end of shoes are on the flat part on the cam. When bedded in dont adjust the rod as the shoes will then need to bed in again.

The switch, when fitted, is on the cable and cannot be removed (or added) without removing one of the nipples.

These brakes are also quite spongy - you can usually pull the handlebar lever back to bar when bike stationary, but try it on the move, when the shoes slide on the brake plate, and you will find it is a superb brake.

Some pattern shoes may not be quite the same dimension as the original items.

Cables are a sort of average, the originals were made to suit Amal levers with  7/8 inch between centre of cable nipple and centre of lever pivot screw, many repro levers are 1 1/16 centres which does have an effect on cable length.

Cables which are too long overall dont help.

Many of us make our own cables so that they are always the right length for our bike.

Twins / Re: A65 '66 Spitfire Gearbox main bearing
« on: 24 May, 2018, 16:15:15 »
I get a lot of my bearings from Simply Bearings. They list the RLS9 1 1/4 bore;

Singles / Re: C15 Wheel Offset
« on: 22 May, 2018, 12:07:23 »
Worth checking that your centre stand will still function - will be long enough - with larger wheels.

Twins / Re: Ignition Problems A65 Spitfire
« on: 21 May, 2018, 13:00:09 »
Suggest you refer back to the Boyer fitting instruction for your system - they are available on the Boyer website if mislaid.

With piston in correct position you need to align the red dot on the rotor with the appropriate hole in the stator plate and when started check timing with strobe light and adjust as necessary.

Make sure battery is well charged, low volts can cause problems.

Singles / Re: B40 Silencer
« on: 21 May, 2018, 09:39:37 »
Most silencer made for BSA 4 strokes are straight through, looking in one end you see right through and only see the central preforated tube. Any absorbing material being packed between the tube and silencer shell. Any packing you introduce will soon be blown out.

You may find a difference between slincer from different makers.

You can buy baffles, which fit in the end tube, such as this ebay item

They can cause a significant power loss.

Singles / Re: B40 Silencer
« on: 20 May, 2018, 22:29:41 »
Ear plugs do wonders for a noisy exhaust.

Singles / Re: B31 dynamo, magneto removal
« on: 20 May, 2018, 13:48:17 »
You need a proper puller to get the pinion off, part 61 1903, about 12 from ebay sellers.

Singles / Re: 71 Starfire TLS front brake adjustment!
« on: 19 May, 2018, 15:00:42 »
If it is a full width hub, used on the Starfire in 1969 and 1970, then you need to shorten the inner cable to get adjustment, presuming your linings have sufficient material and are not worn out.

If it is the 1971 B25SS with conical hub then the brake is adjusted using the adjusters in the hub, see service sheet below.

Both models should have an in cable brake light switch, but pattern cables may not have one (refer back to the supplier of cable) or a previous owner may have decided, sometime in the past 47 years to dispense with it. It is easy enough to add wiring for one when a suitable cable with switch is fitted.

Twins / Re: A10 Rear rim - help needed
« on: 19 May, 2018, 13:00:14 »
Its WM3 x 19.

Twins / Re: Speedo cable thread
« on: 18 May, 2018, 17:48:40 »
1/2 inch x 26 tpi cycle.

Singles / Re: Primary chaincase oil
« on: 17 May, 2018, 14:31:19 »

Its not complicated but it is easy to over think the issue.

These bikes were designed for basic back yard maintenance

The only time I have experienced oil related clutch slip on my A10 was when I used an unsuitable ATF fluid.

When I run out of 10/40 I will go back to 20/50 because it is what I use in the engine and because I have not had any problems with it, just a nice light,  progressive and non slipping clutch.

Singles / Re: Primary chaincase oil
« on: 17 May, 2018, 09:41:21 »
I recently fitted an SRM 4 spring clutch to my A10. They recommended standard 10/30 or 10/40 and also recommended do not us TQF or ATF automatic transmission oil or fork oil as they contain anti friction additives which will make the clutch slip.

I used 10/40 which works fine. Have also used Morris 20/50, same as I use in the engine, and also Morris 20 and they work fine also.

ATF comes in various specifications for different vehicles and if you choose this you need to select the appropriate spec to suit or you will get slip.

Twins / Re: Rear brake issue.
« on: 14 May, 2018, 08:08:04 »
Triumph service bulletin showing the modified pivot pad.

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