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Topics - Pete Gill

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1
Singles / Leaking oil tank
« on: 19 September, 2021, 19:14:02 »
Hi All

Itís a 1949 B31 rigid

I have a leak coming from the back of the oil tank on one of the seams where the mounting bolt enters.
I canít  really see much but it seeps slowly and soaks the back of the gearbox and drips.
Most likely metal fatigue ?
Can these be welded or brazed?
Advice would be much appreciated.
Pete

2
Singles / Luggage rack B31 Rigid
« on: 12 June, 2021, 00:12:53 »
Hi All
Iím interested to find a rack for my 1949 B31.
Iím not even sure what they looked like - my assumption is that they could be similar to The M20 WD racks.
If anyone has one, or even just photos to see how they fitted Iíd be pleased to see.

Pete.

3
Singles / Backfire through carb.
« on: 10 March, 2021, 10:58:18 »
Hi All

I rebuilt my B31 (1949)  a while ago but havenít had chance to get out on it to test ride.
Iíve had it going on the main stand and have warmed it up and run it through the gears to make sure it selects and the clutch works okay.
I have done this 2 or 3 times this winter just to get the engine going and iron out any faults.
Itís been running well up to now and Iím pleased with it.
Last time i did this i found the engine seemed to misfire and stop suddenly when running between 1000 to 2000 revs. It popped back through the carb.
It happened again shortly after when restarted. Ive not tried to restart since for fear of causing damage (although it will start easily).
The only adjustment i had made that day was to slightly open the air screw on the pilot jet as it was i think running a bit rich.
I have checked the timing and points as i thought it might have slipped but its spot on.
Carb is not loose on manifold.
Plug is black with thin film of soot but not oily or wet.
Can any of you advise?
My thoughts now include a sticking inlet valve? ( head rebuilt recently with new valves and guides)
Could it just be old fuel or a carburettor issue?
I have a new Amal monobloc set up standard running with a bell mouth.
Magneto has been overhauled and tested recently.

Pete

4
The Star and Garter / Hans Renold
« on: 13 February, 2021, 18:20:08 »
For anyone who may be interested Hans Renold used to live within a stones throw of my house.
The main factory was a short distance away in Burnage Manchester.
Some of the old railings still exist and you can just make out the Red shield and white cross that was one of their logos at the time (probably due to Hans Swiss heritage).
He had a big old house in Heaton Mersey close to where I live now.

Pete

5
Singles / B31 Ignition timing
« on: 31 December, 2020, 10:27:35 »
Hi All,

Just rebored and fitted new piston. Cylinder head still off.
Iím just in the process of setting the timing and checking valve timing with a timing wheel i attached to the timing side of the crank. I have a dial gauge set onto the piston crown. As a matter of interest i checked the degree rotation of the ignition (7/16Ē BTDC measured on the gauge) this equates to 42- 43degrees BTDC on crank rotation! It sounds very advanced to me as most bikes Iíve timed tend to be 37-39 degrees. Am I somehow measuring wrongly or is this correct - is it due to longer stroke and lower compression than most bikes Iíve timed?

Pete.

6
Singles / B31 Oil pump
« on: 10 November, 2020, 23:57:02 »
Hi All,
Perhaps you may be able to help?
I bought the 1949 rigid B31 earlier this summer.
It ran well but leaked engine oil mainly i think due to a blocked breather.
I have pulled the engine out and have split the cases, mainly to inspect, clean up and then re seal the crankcase.
The crank, big end and main bearings look okay but the oil pump body has a few small flaky cracks.
Iím concerned it might fall apart so bought a new body from the BSA specialist suppliers in Netherlands as I couldnít find one here in UK!
All well cleaned out but the mechanism feels tight and has the odd Ďcatchí when rotating by hand.
In a previous post someone suggested lapping the end plates, but Iím not really certain whether this might help? Has anyone had a similar experience and discovered a solution?
Pete

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