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Messages - JulianS

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Twins / Re: Headlight bulb lighting
« on: 22 February, 2018, 17:00:53 »
The wiring diagram is from the Owners manual for the 1973 T65 Triumph engined BSA badged 650 referred to as the T65 Thunderbolt.

Further reading of that book reveals that the T65 had a 3 position toggle switch on the headlamp shell and  simple on/off ignition swtch on the left headlamp mount.

Photo is from the 1973 parts book.

Singles / Re: 1950 B31
« on: 21 February, 2018, 09:26:15 »
I think the washer goes into the crankcase bearing recess before the ball bearing is inserted.

Singles / Re: B40 wiring advice and spacer advice
« on: 20 February, 2018, 18:13:17 »
The swinging arm spacer is part 40 4213 and it fits on the offside/right side.

Diagram from 1965 parts book because I dont think it is shown in the 1961 book.

Key also from 1965 book showing it fitting on the offside.

41 4055 is a spacer with a smaller hole than the one above.

Singles / Re: C15 lighting
« on: 20 February, 2018, 14:21:34 »
If you have thestandard nacelle there are 2 screws on the black rim , shown on the parts list photo below, which fit in elongated hole which allow some adjustment of the beam.

Twins / Re: Headlight bulb lighting
« on: 20 February, 2018, 09:29:00 »
The only time you will get dip and main together would be for the moment when switching from main to dip and dip to main, as in the Wipac Ducon/Tricon/triconsul switches.

Singles / Re: Trials specifications for C15
« on: 20 February, 2018, 09:24:07 »
Some information on C15 trials spec from this 1965 season USA catalogue - smaller carb - same compression as standard C15 and different gears.

By 1966 the Trials model was no longer in the catalogues.

No parts book issued for C15G model, as far as I can see, just a parts bulletin supplement to earlier catalogue.

Singles / Re: 1957 B31 Maroon colour scheme
« on: 19 February, 2018, 10:31:30 »
I expect you will find chrome under the tank paint - look under the badges or around the neck of the filler.

Singles / Re: 1957 B31 Maroon colour scheme
« on: 19 February, 2018, 09:21:55 »
Done a few of those over the years!!

Singles / Re: 1957 B31 Maroon colour scheme
« on: 19 February, 2018, 09:05:49 »
The usual finish for a 1957 B31 - EA7 frame with Ariel type hubs - would be all painted parts maroon, including frame and forks. Chromed tank panels. Alternative colour available black.

Many bikes, over the past 60 years, have undergone owners preferred cosmetic changes.

Photo from 1957 catalogue.

Singles / Re: id problem and hello I'm new
« on: 16 February, 2018, 19:53:06 »
The C15G was the last and best of the C15 engines with stronger bottom end and gears , made mid 1966 until mid 1967. About 2300 made in total.

Singles / Re: B40 Star air filter - what's the best option now
« on: 16 February, 2018, 09:25:31 »
My 1961 B40 had a filter arrangement which was exactly the same as the C15 and just as the parts photo posted by Bess above, checking the part numbers they are also the same.

The 1965 parts book shows a slightly different assembly. Posted below.

Singles / Re: B31 crank shaft
« on: 15 February, 2018, 19:41:22 »
The ball bearing locates the crankshaft.

The roller bearings have a high load capacity, lipped rollers bearings were fitted as original equipment. The lip goes on the outside, makes it easier to dismantle the bottom end, the timing side should just fit off leaving the outer in the case and the inner on the shaft.

On the other side the ball bearing and roller outer will stay in the case and again the inner will stay on the shaft.

Stick with what BSA intended, it would present considerably more problems reassembling the bottom end if you changed to a non lipped bearing.

The Star and Garter / Re: cotter pin
« on: 15 February, 2018, 15:59:25 »
Stainless ones available on e bay. I have just ordered one.

A few years ago I bought some top quaity ones from Gold Star man Dave Flintoft

Twins / Re: Oil Pressure gauge
« on: 14 February, 2018, 18:05:18 »
You will need to find a suitable position, where there is space to fit sensor, to drill into the internal oilway between pump and the PRV, (and be sure you can clear any swarf caused by the drilling) or maybe consider if the PRV could be modified.

I see it as a very difficult modification.

Twins / Re: Oil Pressure gauge
« on: 14 February, 2018, 16:49:52 »
1. Sender needs to go between oil pump and pressure relief valve. Certainly not in either oil hose.

2. Fit oil filter in return line. Hose from return connection at crankcase - the upper one - to the inlet side of filter, then hose from outlet side of filter to return hose connection on the oil tank, again the top one.

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