What is causing the throttle to bog down

SOURCE: QUAD QUESTION! 1998 yamaha warrior 350 bogging down

sounds like fuel starvation
do you have a petcock plugging or a dirty carb?
pull the fuel line and check flow
later paul

SOURCE: my 01 yamaha warrior bogging down

Have you changed the spark plugs? If your plugs aren't firing correctly, this can cause the problem. If you have dirty carbs, this can also cause the problem as you will put too much air in and not enough gas.

SOURCE: bogs down at 25 30 mph 1st gear 45 in 2nd gear

• Check to see that the choke is not partially on.
• Drain the carbs and clean them with B12 chemtool or any other good carb cleaner. The main jets in the carbs are probably gummed up. To clean the carbs properly they will need to be removed from the bike. Be sure to balance and synchronize the carbs when reinstalling.
• Remove and clean the petcock water trap and clean the trap of water and rust etc. If a filter screen is present clean it as well.
• Set idle speed to factory specs. Do not use gas with Ethanol.

SOURCE: 125cc yz motor flooded and wont start.

Start with a new stock NGK spark plug. Check for spark. If spark then do the following > >
Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. 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. 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. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each 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. Set the idle speed with the idle screw. This process should get you back on the road.

Please rate this solution. Thanks!

SOURCE: i have a 1998 yamaha warrior 350 that will sit and

Clutch switch behind clutch lever. Parking brake cable is attached to it. It cuts the revs if the parking brake is engaged to stop it from being reved when stoped.