I was lucky enough to pick up my second B44VS - with a gap of 49 years in between. Engine & frame no AD06362 B44VS. I believe it is a 1970 model, probably a US import. The carby is well worn, so I'll replace it. It's a mk1 concentric 930/R92, pilot jet bushed, which I think was originally from a Triumph twin, though I could be wrong. It is jetted the same as the workshop manual except for the bushed pilot jet, and runs pretty well, though the idle is not reliable.
My problem is what jetting I need for the new carby.
Haynes says main - 230
pilot - 25
njet - 107
slide - 3
Workshop manual- main - 220
pilot - 25
njet - 107
slide - 3
Amal website - main - 240
pjet - bushed
njet - 106
slide - 3.5
Any B44VS addicts out there who can point me in the right direction?
Cheers, Mike.
Hello Mike,
My recently restored B44VS came off the production line a month after yours. I bought a new Amal Premier 930/29 carburettor from Surrey Cycles in the UK and they advised and fitted the following. I'm a novice at this game but to me all feels good with a easy starting (most times), reliable slow tick-over, good pick-up and smooth running. I've not had it flat out yet so can't comment on top speed.
Main = 230
Pilot = RJ17
Jet = 106
Slide = 3 1/2
Good luck
Rob
Hi Rob,
Thanks for the information. Your description sounds just what I'm hoping to achieve. Though the easy starting (most times) is the best you'll ever get from memory.
Cheers,
Mike
Hi Mike
With my B44 Victor Special it took me a while to nail the carburation - the biggest effect was changing the needle jet as it seems if only slightly worn can affect the running drastically - all other components & settings being in good shape of course. As for starting.... It's first kick with mine from cold...although it hates an audience - don't we all - & will sometimes let me down & need a couple more if we have gawpers later! I'm sure correctly timed electronic ignition helps along with the knack you develop. Good luck! ;)