Whats the fuel and oil ratio for a suzuki ts 250 x

the ratio should be 25 to 1 so 250 mls of oil for 1 litre of petrol

the manual shows for a 100 :1 mix the ratio is 4 ounces of oil to 3 gallons of fuel
there are two engines and one is 50: 1 ratio so that would be 8 ounces of oil to 3 gallons of fuel
there is a pdf version workshop manual at www.motoren.ath.cx and it gives the ratios for all of the 4hp suzuki outboards and the oil to use

Are you asking as in oil to fuel, or air to fuel? If oil to fuel I seem to recall that these were oil injected unless the oil injection is failed and you are mixing now or it is a old RM? Please get back with that info and you will get a better answer.

If oil to fuel is the question then 32 to 1 would be good for a newer 2 stroke and if from the 1980's 20 to one. I would be more comfortable if I knew the year before making and certain mix ratio though. You can contact a Suzuki dealer to get the info also... That is if it is not a oil injected model.

Back at one point I recall some 2 stroke with oil injection sprayed the oil so as to increase longevity. Bypassing the injection may not be the best idea although some people, Not Suzuki Techs, state with confidence that bypassing is just fine. While I am a Suzuki trained Tech it has been some years since I worked on them as I went on to Porsche.

I added a link that will answer you if it is about air fuel ratios.
Airfuel ratio Wikipedia the free encyclopedia

40:1

32:1 is the recommended mix ratio. Use a good quality oil and keep your air filter clean!

No it has an oil injector under the seat.

check to see if gas is flowing from gas line make sure fuel tap is turned on. Check the plug and replace it if not new check to see if the carburetor is dirty. Make sure if you have an oil injector to check the oil lines. To name a few things.

use decent two-stroke oil at 50 to 1. don't ever buy oil from a gas station without sealed container; who knows what the oil really is