1992 Suzuki 250 Quadrunner 4x4

[St3v300]

Ok I have this 1992 Quadrunner 4x4 that is about to drive me nutz. I rebuilt the carburetor because the needle valve was letting gas drain thru to the crank case. Rebuilding the Carb seemed to take care of the gas drainage problem, but after the motor warms up it starts cutting out and seems to have black smoke coming out the exhaust like it is getting too much gasoline and flooding out. It starts missing when you finally get it started. It has about 1650 on the odometer. I know it is a 4 stroke and there are valves involved, and I was wondering if that might have to do with anything. I refuse to take it to a dealer and get put over a barrel with all their fees and "expertise".. SO I'm up for any other ideas...

Yes I changed the oil.

St3v300

[Mudflap64]

My first suggestion is to check the choke cables! My 2002 had a choke issue that drove me nuts. I chased it down and it ended up being a darn locknut on the choke cabel elbows. Sometimes simple problems cause the worst problems.

[St3v300]

Thanks, I was wondering about that too... Do you know anything about adjusting the valves on this old of a machine? Appreciate the reply, and thanks again.

[Thayer40]

If you are going to look at the valves i would just change them. Changing the valves on them arent too bad. I did it myself on my 91 KQ 300 and it really wasnt that bad. The only problem i had was that i had my timing chain 2 links off TDC and i finally figured that out when i took it in. But if your just going to adjust them you are going to need a feeler gauge that is bend about an inch and a half down from the end because you gotta reach down a little ways to get in there.

(The valves are pretty cheap by the way)