Helping my friend out on Ninja250

[nikux]

Having worked on my bike, doing basic mechanical jobs, my friend is now wanting me to look into his bike thats not working  , and I look upto you guys because this one is out of my league.

The problem happened when we were returning from a long ride, we were on a free way with heavy traffic so he was riding slowly. When it was too heavy traffic, as his rpm went below 2k, suddenly his bike died on him. After cooling for about 10 mins, we again tried to start the bike but it did not idle. However, giving it a big throttle did start it, but again as we left the throttle the bike would slowly die down. Still being about 150 miles from we just increased the idle screw so that it idle'd at 3.5k, and did not die.

After coming home, he tried to start the bike the next day, and initially he saw gas coming out of his exhaust, and later on the bike just did not start. He is not out of gas. I am not sure what could the problem be, but my thought was something to do with the vaccum, but then it was ninja250, I tried to look for vaccum lines but was not sure if was the right one, neither was sure how to check for vaccum leak. But the problem could very well be something else.

Any suggestion on how to troubleshoot it?

if it helps, it was almost end of a long ride, he did about 600 miles on that bike in previous two days and there was a stretch where his little ninja pulled off 100mph for about 15mins.

[mach1]

Gas coming out of the exhaust wouldnt that mean he flooded his engine? Usually in cars if you flooded the engine you simply floor the gas pedal and crank the engine until it starts, Bikes may be different. I would say check the fuel system for the S.O.V and put a charger on the bike and crank her getting all that fuel out of the cylinders shuting off the fule will help dry it out, Then work your way check the fuel lines starting from the engine and all the way to the tank looking for something stuck open letting fuel flow freely to the motor when its not supposed to.

[CndnMax]

Gas coming out of the exhaust wouldnt that mean he flooded his engine? Usually in cars if you flooded the engine you simply floor the gas pedal and crank the engine until it starts, Bikes may be different.

thats what i did when my sister flooded the car, not sure if its the right thing to do but it worked.

[kml.krk]

I flooded my GS once (I was going to take DMV Road test and I was stressed a lot) and I could not start it, so I fully opened the throttle and I hit the start button. it started right away and RPM jumped up very quickly so I let the throttle of very quickly too, to not overrev the engine. It ran like a charm later on that day. So I would say that method works for both: cars and GSes
cheers

[NiceGuysFinishLast]

valve adjustment?

more details are needed, other than just "ninja 250"