Hi there, your BSA was at the 2007 thundersprint. I was also there racing our 1956 Norton Dominator sidecar. I was the one hanging off the side. Here is a fuzzy photo taken from a youtube video showing your bike. Unfortunately I have mislaid my old programmes so cannot identify the rider.
Ian

Hi Alan,
I am 62 now still going strong. i have removed the mudguards and fitted chrome ones as the tank, mudguards, oil tank wheels were all different shades of red. I will refit them when I get round to respraying them all the same colour.

Cutting out problem sorted. Turns out the coil was breaking down when hot. New coil fitted and it runs like a dream now. Thanks for all your suggestions.
Ian

Rupert Ratio manuals worth every penny.
Ian

Tried the concentric carb today, ran well but still started to misfire and cut out. not as bad as the monobloc but still not right. i think i may have a dodgy coil, (new one one order) and also a worn out monobloc carb.
I have owned lots of 2 stroke race bikes and it is definitely not seizing. No tank sealer or inline filter.
Still running 6v electrics with points.
thank you for all your suggestions.
Ian

I do have an insulator fitted and the fuel cap breather is clear. I have just taken the monoblock carb off and fitted a concentric  this morning to see if that makes any difference. The only problem is that it is harder to start from cold with the concentric as there is no choke fitted just a tickler. The monoblock usually fires up 1st or 2nd kick with the choke from cold.
Ian.

My 1961 B40 runs great until around 20-25 miles then starts to hesitate at large throttle openings then it cuts out completely and will not restart. I have sparks and plenty of fuel but it will not fire back up. Leave it for a couple of hours and it starts straight away. It suggests an electrical component overheating and when it cools it is ok again, but before it cuts out completely it appears to be a fuel issue missing and backfiring at bigger throttle openings. I have set the valve clearances larger in case they were holding a valve slightly open but there is still good compression when hot.  Any ideas???
Ian

Hello,
the reccomended oil for my B40 is SAE 30 according to the manuals. Are modern multigrade oils suitable and if so what grade?
Ian.

Hello,
I need a kick start shaft with bush for my 1961 B40 distributor engine. Is it the same as a C15 one?
Has anyone got one for sale?
Ian

Hello,
This is my first classic british bike. I have had bikes continuously since the age of 12 mainly japanese and Hinkley Triumphs.
Ian

Thank you,
Ian

Good afternoon,
I am trying to find out the AC and DC terminals on the old style rectifier fitted to my 1961 B40.
Has anyone got a photo of theirs please.
Ian

I had an ojd socket set box full of old taps and dies that my father had from his motorcycling days.
unfortunately at the time I was riding Hinkley Triumphs and Yamaha RD 2 strokes so did not need the taps. I sold them to a friend who had Velocettes a long while ago. I will have to keep an eye out for taps, dies and spanners.
Cheers Ian.

Thank you Julian,
I will get some spanners and look out for some taps and dies.
Ian

Hello,
I have just bought my first old british bike. I have had dozens of jap machines and also hinkley triumphs, all metric threads. What screw threads are used on my B40. I presume they will be BSF.
Thanks Ian.