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Author Topic: Fuel Issue  (Read 619 times)

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Fuel Issue
« on: June 25, 2014, 08:43:54 pm »
I have a 1992 Suzuki LT250R that was running previously. The previous owner did not have the air box lid on it and it ran fine with a 240 main. He said to his knowledge it is stock besides the FMF Fatty and Silencer and a cool head. He has no idea what size and I cannot find a size. I'm guessing I have to take the head off for that one. It was a white smoke and I deciced to put a 230 main in it.

I sparks once and awhile. I take the plug off and it is soaked. When it runs and give it throttle it bogs and dies. The plug is soaked again. Checked the clutch fluid and it looked like it has seeped into the case. I replaced it and left it at that.

Its over 75 degrees here and 300 ft elevation. Clymer states like 190-200. What size should I start at?

Thanks.

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Re: Fuel Issue
« Reply #1 on: June 25, 2014, 10:18:49 pm »
Could be a bad clutch side crank seal
91 lt250r fully restored and race ready

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Re: Fuel Issue
« Reply #2 on: June 26, 2014, 07:24:14 am »
When I drained the tran oil. It was not low, actually had like 30 or 40 more ml. My petcock is messed up and leaks even on off. I think the gas leaked into carb and down the cylinder. I have no idea haha. Should I start with the stock 200 jet or go above 240?  My father says its blue smoke. I put in an air filter because it didnt have one before. Can't believe it changed it that much.
 Thanks

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Re: Fuel Issue
« Reply #3 on: June 26, 2014, 10:48:05 pm »
Ok I thought you meant there was no trans oil or it was low my bad. I would start off cleaning the entire carb, adjusting the float height,setting your slide height to 3mm,  then start off with the pilot circuit the air screw on the left side of the carb you can bottom it out then set to 1 1/2 turns out to start off at that's what I do anyway then turn in clockwise once running see if idle drops and it wants to die. Turn back out if it does that I usually set it at the point with the highest idle then back in 1/4 turn, usually for me 1 1/2-2 turns out is the sweet spot . If you have to go out more than 2 turns you need a smaller pilot jet. Then move on to your needle clip position I start on the middle clip run it around see how it feels adjust it to where it runs the best. Main jet you'll have to do plug chops but you can get it close by feel then fine tune with the plug chops. Make sure you use the same premix ratio everytime and use the same octane gas with the same oil otherwise your jetting will be off I run 32:1 with 93 gas and maxima 927. This is just the way I do it I'm sure there's other procedures or I'm forgetting something I'm sure someone else will chime in to correct me if I'm wrong. Hope this helps
91 lt250r fully restored and race ready

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Re: Fuel Issue
« Reply #4 on: June 27, 2014, 06:29:15 am »
Helped greatly thanks.

by plug chop it is dark and oily. Whole thing is soaked. Pilot screw does not seem to work either.  Cant work on this machine till this weekend. Hopefully get it running by Tuesday.

 

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