Got a 50k mile MK1 1200 Bandit - just changed the carbs for a set off a 10k mile model but cylinder 2 won't fire. There's a good spark, the float bowls are full and, with the air filter off i can see the the pistons moving OK. I checked the compression - all cylinder are similar at around 120psi. I know the carbs are the last thing i changed but i don't think its related to that - could it be a sticking valve? or is it something else?
Cylinder 2 not firing
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Welcome slowbow,was the bike firing on all 4 before the carb change?
If so is there a vacuum pipe connected to no 2 inlet manifold for the fuel tap?
Did you check all the pilot jets for blockages before fitting this carb?
Hi and thanks. Yes it was firing on all 4. The vacuum pipe connects to number 3.
No, I didn't check the pilot jets - is that what it could be?
work mostly up to 2/3000rpm,you should have checked them because even partly blocked will cause a weak mixture which you cannot afford with an air/oiled cooled engine.
do you think carb cleaner will do the trick? or will it be a case of dismantling them and cleaning or replacing the jet?
won`t unblock a jet,remember you need 4 pilot jets 4 choke /starter jets and 4 main jets CLEAN & CLEAR.
I would fit an inline filter as well so you don`t get any crap from the tap.
for the help J90 - i'll go and check it out now.
you were right jaffa
one of the jets was blocked - just going to refit them now - do you think i should clean the tank out
Clean the whole fuel system, and fit an inline filter.
assumption is the mother of all f*** ups.