Hello team i think i have some misfire and my exhsaust makes like gun sound,ok i will check the timing but when it runs and i have full advance the motorcycle is switching off like i lift the vave lifter,any suggestions?fisrt time is doing this.thanks
It's very difficult to diagnose machine and owner at a distance, but normally over-advanced ignition will cause rattling and engine damage rather than backfiring. You don't say if you have had the machine long. Was it OK before ? Do you have experience with manual ignition advance / retard systems ?
A carburettor air leak, valve problems or head gasket damage can cause popping and banging too. Does the choke make a difference ? Are you using the choke correctly (tight wire for choke off).
Yes it was normal before,i didn riding it a lot two times per month,so i have amal 276c 1b,new spark plug B6hs with closed gap,i found that the poin gap was very closed.
Yes I know this but this in not now,in idle working when I give throttle its off, when i ride it a little about 1 km start to have misfire and off again.i start to believe it's the point gap,because I change the carburator to see what happens,it was the same,when I give advance its off like like pressing the valve lever,I have no leaks from the cylinder head.
If the choke helps when riding, and not simply when starting from cold then I'd suspect that the pilot airways might be blocked. It's a common problem and not difficult to deal with but it does involve the extremely careful removal of the jet block from the mixing chamber. I have no idea of your experience and skills, but if you have any doubts then best to ask here first.
