Finally started my 79 suzuki TS 250 and it wouldn`t stop. There`s no kill switch. I had to turn off the fuel and let it run out. Kind of worried about starting again. Tried starting it again, but having problem,won`t start. Any ideas as to how to fix this.

The TS 125 was a great little engine and although not the most basic of 2-stroke designs, they aren't the most complex by a long way.

I suggest you try and find a repair manual so you can do your best for what was a great little bike.

The fact it is firing when you introduce fuel into the combustion chamber indicates the engine has upper compression and the ignition system is producing a spark at approximately the right time so there are three things on the list of requirements ticked off.

What it obviously doesn't have is induction drawing fuel from the carb and delivering it to the combustion chamber. If the fuel tank, filter, fuel tap and fuel line is ok, the fuel fresh and the carb clean then induction must be possible so if it isn't happening it is likely something is wrong in the crankcase preventing crankcase compression and a good and strong induction pulse - perhaps the crankshaft seals are perished or defective in some way?

Hi, the standar for the air/gas screw is 1 & 1/2 turn out from total screw in. Start from there and then you only need minor adjustments. As for the 5 min ride and then nothing, check you fuel suply, start with the buoy level inside the carb.
good luck

Have you tried reseting the ECU, it's worth the try
All you have to do is disconnect the negative battery cable for 5 minutes, press the brake pedal several times while turning ignition switch on and off and this will reset you computer to factory settings....

This may not help but here goes.

The button for starting bikes is usually on the right handlebar under the light switch. I had a Suzuki that wouldn't start unless you pulled the clutch in (Left handlebar, lever in front of grip). Make sure the red kill switch is on too (right handlebar).

Good luck

If your talking about air fuel mixture screw a good place to start is turn screw clockwise till stops.back out 1 1/2 turns get bike running see how throttle responce is.If bike is still sluggish then try 1/2 turn increaments counterclock wise till bike runs smooth.Good luck ...Brian

Drain the carb with the gas valve on the tank turned off. Now turn the valve back on and see if gas again begins to flow out of the float bowl. If no gas drains with the valve open then remove the fuel line at the carb and check to see that fuel flows freely through the fuel line. If gas flows freely out of the fuel line then the float needle is stuck closed or trash is plugging up the needle jet assembly. If so, remove the float bowl and free up the needle. Use spray carb cleaner and the little "straw" that comes with the can to direct the spray into the float needle fitting. Fuel should flow when the float is down and stop flowing when the float is lifted. Pull a spark plug and ground the metal against the cylinder. Check for spark. If there is no spark then check the operation of the kill switch on the side stand and the handlebar. Use a multimeter to check the switches. Get fresh gas and install an in-line fuel filter to keep any trash out of the carb. Clean the air filter. Please rate my answer. Thanks.

I just picked up a 1974 ts250 with a broken ignition too. The previous owner just cut all the wires and removed the ignition all together. This allows the bike to start and run (with 4 bare wires sticking out...). To kill it, I touch the bare ground lead (the black wire with the white stripe) to the handlebar clamp (or any other ground source). Not a permanent solution, I'm working on wiring up a nice little toggle-switch along with a hidden toggle to keep it from being able to start all the time. These old dual-sports are pretty much dirtbikes with a road-kit factory mounted. So the electrics are pretty simple. Hope this helps!

Check the oil level incase it has flooded the sump from being on prime, it may also have filled a cylnder with fuel, which can stop it turning over.