Hi, Just got a VS800 intruder with Chinese diaphragm carbs - Mikuni BS36 (I think). I had a lot of backfiring and so removed the front carb, cleaned jets, checked float valve and found that the diaphragm looked like a sieve. Bought a new diaphragm and fitted it.
Connected up and the bike ran well but now some backfiring from the rear cylinder now. Took diaphragm out and found it was OK - no holes but there was a crack in the carb body which snapped off!!! I couldn't afford a new one so found an aluminium welder specialist and had it welded up. Of course I had to remove it to have it welded.
Put it back together, with a smidging of gasket goo just to be sure and now find I can't get the engine to run at all. I realise that the Haynes manual suggests that it is not recommended to undo the couplings from the first carb to the second but had no choice. I have seemed to have put all the couplings back as they came off with the same settings but still no run.
The problem getting it to run has only occurred after removing the rear carb. I seem to be getting a spark but nothings firing up.
What have I done or not done - I'd appreciate the help from anyone who is more familiar with this set up.
Thanks for reading this chapter!!!