Fzr600 down on power suddenly, then won't start

[blackfzr600]

Ok so as some of you may or may not know I had some issues with my 99 fzr 600 about a month ago and it turned out to be the voltage regulator which I promptly ordered and it fixed the problem (after frying my brand new battery of course!). Since then I've ridden the bike about 7-8 times with no probs whatsoever. Today i go to take it out after work, make it about 1 km from my house and it starts bogging down while trying to accelerate in 2nd and 3rd. I Immediately turn around to come home and the first stop light I get to it stalls and wont restart. I had to walk the damn thing back home uphill!

I know my description is vague at best, but any ideas as to what this could possibly be? I checked the gas tank, plenty of fuel in there but not sure else what it could be. Battery is good and engine turns over no prob, almost sounding like it wants to start but it just wont catch. Before the did the voltage regulator it ran mint, and after it did also, until today

I also have my M2 roadtest in 3 days from now and if I dont take the test I have to get my learners permit all over again because it will expire.....f*ck me

[blackfzr600]

update...got some fresh gas cuz I thought I ran out but NOPE. will stay running on full choke but as soon as it comes off it stalls.

Help...anyone?

[tclayton9]

Have you checked for an air leak? Make sure you airbox is secure and get some like starting fluid to spary around the carb intake boots and see oif your rpms change.

[M in KC]

The symptom of running with the choke on and not running with the choke off indiactes to me at least a fuel/air fuel management issue. With the choke engaged (on) you are enriching your air fuel mixture by allowing more molecule of fuel to be mixed with fewer molecules of air. The reverse is true when you disengage (off) the choke. So the question is why is the motor wanting more fuel seemingly all the time in order to run?

IMO air leak(s) are a potential source for this symptom along with compromised pilot circuits in your carbs. Potential source for air leaks include but are not limited to carb to cylinder manifolds, carb to air box couplers and the air box itself. At an idle condition, the throttle position should not be on the "main" circuit part of the carb but on the "pilot" ciruit. Perhaps you have/had some sediment in your petrol tank which fouled one or more of the pilot circuits. Since you have fresh petrol in your tank now that fuel is most likely not the cause.

As suggested previously spraying strating fluid around the carb connections both tothe cylinder and to the air box and listening for an increase in motor rpms is while spraying. If your revs increase, then you know you have an air leak(s). Stop and fix these before going any further to eliminate them as an on going source of your symptoms. If the starting fuild doesn't yield any evidence of air leakage I would then move onto opening the carb up and cleaning and inspection them.