Mark said:
Yes.
Rohan said:
Looks very neat. Tell us more.
Do you have brass/bronze crankcases ?
It has cast iron crankcases. The motor is stock, rebuilt with new ball bearings, new 40 thou over pistons, new valves and guides.
It has Pazon electronic ignition & PVL coils to replace the magneto. It always starts first kick.
It has a Commando clutch & belt drive & a Lucas alternator from a Commando, a Tympanium AC converter/ voltage regulator.
Gearbox is stock 1928 BSA three speed. Front brake is BSA M20.
It's brass timing cover was too rough to save, I made that one from an old alloy barbecue plate.
Inlet manifold is home made & the carburetor is an Amal 276.
It is as comfortable to ride as any rigid frame girder fork bike.
It will cruise at 100/110 kph, but doesn't like going above that.
It is only the small petrol tank (with the oil tank in the front) and crankcase pressure that stops it being a great rally bike.
After last years All Brit, when it was first finished, it had a few oil leaks.
So we replaced the stock 3/16 ball & spring breather with a reed valve at the end of that tube above the primary cover.
I thought it had solved the problem as it was oil tight while riding around locally.
It wept a little oil from the lifter cover threads on the way to Newstead, but I was full throttle up the hills.
Keeping it under 3000rpm (100kph) on the ride to Maldon & back it remained oil tight, but 50 k into the run on Sunday it was leaking a lot of oil from the lifter covers even at 80kph, so I rode back to the rally site without completing the ride.
The bike went back to Melbourne on a trailer, and I rode my Commando home.
Tomorrow I'll start cleaning the burnt oil off the exhaust pipe, & increase the size of the breather hole into the tube.