Rwoody

I hear you. I have ordered the new Needle jet and Jet Needle that are the proper sizes. I believe this it the root of the problem I am having. I read for about two hours last night about Mikuni Carbs and this surely sounds like what I have going on. All the other parts have been changed but most kits do not have the needle jet and you have to order that separate. I will post once I change it out and see what happens.

From what I read last night this problem arises with machines with some mileage like this one. Thanks for the help

I have been rebuilding a Suzuki LT4WD. I have replaced the valves, guides, seals and honed cylinder and replaced the rings. I have measured the timing chain and set the timing and adjusted the valves. This machine would run for about 30 minutes and continually get harder and harder to start and would smoke out the valley. I have corrected the smoking problem but have not corrected the starting issue. I need Ideas

I have done resistance checks on the pick up coil and the voltage checks on the stator and all are with in specifications according to the manual.

The machine will start up cold almost instantly. She will run for about 15 to 20 minutes and then start to fumble and die. At this point its almost impossible to get her to start again. The Plug is black with soot. Which tells me to much fuel (RICH) I have rebuilt the carb and reset the floats and check it several times now. I can not seem to find anything wrong. The diaphragm has no cracks or holes and seems to work fine. I have adjusted the floats to spec and no change.

I read a motorcycle thread that had a similar problem and it turned out to be the main needle Seat. They said it was worn to the point that it was oval and would not allow the needle to close it off and it was acting like the choke was constantly on. To much fuel.

Has any one encountered this. Carbs seem to be my nemesis and I always have problems when I mess with them

Thanks