The way you explain this, the fuel and air mix is wrong, is the spark plug wet, if it is check the carb air mix screw. remove the mix screw and use a can of air and blow it out. before doing this remove the air filter and the spark plug then spray some wd (brand name) in hole and do again with the air can. then screw back in. leave the air filter off. and put spark plug back in and start the engine you will need to adjust the screw until you can get it to start. when it does give it a few good revs and keep it running for a bit. replace the filter and start engine and you will need to adjust the air screw till the engine sounds right again.
SOURCE: carb on dirtbike
Petcock on and gas flowing through it? Is it vacuum actuated, or just on/off/res?
SOURCE: SPEED IDLE SCREW AND MIXTURE SCREW SETTINGS MY
ALWAYS have a fire extinguisher on hand when working on carburetors. Drain the carburetor. There should be a plug on the bottom of the carb float bowl. Remove the plug then replace it after the fuel drains. Remove the carburetor from the engine.
Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the air screw on the outside throat of the carb and spray into the screw hole as well. Be sure to put the air screw back in. IMPORTANT > do not tighten this adjuster down. Only screw it in until it LIGHTLY seats. Now turn the air screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.
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Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part and/or the notation "Not Available" is in the description, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx
SOURCE: my 2006 rm z250 is having a hard time kick starting
2 things
reed valves are worn out
or low compresion
SOURCE: I have a 2001 Suzuki RM 125, it won't start
hi mate i had a rm 250 with the same problem, have you done a compression test, as mine had poor compression
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