My 2000 Yamaha blaster 200 runs good at half throttle but bogs after half throttle

SOURCE: yamaha yfs 200 blaster manual

You might find a free pdf service manual on this site, they have a ton of them.
http://www.carlsalter.com/motorcycle-manuals.asp

or try your local library. Often guys will donate manuals to the library.

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SOURCE: bike bogs for second then revs when throttling

Pull the slide out of the carb then remove the jet needle and move the clip one notch lower on the needle.

SOURCE: yamaha blaster runs but wont rev

ALWAYS have a fire extinguisher on hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and 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. Before putting the slide back in the throat of the carb, move the clip on the jet needle one notch lower. 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. This process should get you back on the road.

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SOURCE: i have a 2004 yamaha blaster 200 i need a diagram

i can't seem to figure out why my 2004 blaster 200 won't idle properly. i cleaned the carb and replaced the spark plug. it revs fine but when it goes down to idle it just dies. any help?

SOURCE: I have a 2001 Yamaha 200 blaster 4 wheeler.

You have to adjust the jets on the carb, theres a high and low jet, Turn them both all the way in ( dont force them) just turn until they stop, now losen each one in 1/4 intervals and try running it,