Off idle bog slow roll on

SOURCE: yz 426 wont idle, backfires and bogs out

Hello phwolfe,
Did not backfire but , boged out appling fuel. Found it was flooding because
the floats were over filling the chambers. Adjusted float settings (by eye )
problem solved !! Keeping the chambers 1/2 to 3/4 full worked for me.
My Bike is a 1983 Midnight Maxim 653cc. 4 Cylinder. Maybe yours is fuel injected ?

Best of luck !!

Ron

SOURCE: wr 200 power problems

Unhook exhaust pipe,check port for blockage. if it is clear try to rev up with pipe off.If exhust is clear you will need to check high side of carb. good luck

SOURCE: BOGGING DOWN

This sounds like water condensation. Drain the carbs and a cup of gas from the tank and see if that solves the problem. If no joy, check the filter screen (inside the gas tank) mounted on the gas valve. A plugged screen may not let the gas flow freely to keep up at higher speeds. If still no joy, clean the carbs.

SOURCE: yz 150f bogs when you give full throttle all at once

ok, assuming you replaced the carb header and stator with aftermarket parts, then I would say you definitely have a jetting issue. that flat spot is coming from your engine starving for fuel. its taking the gas too long to get from the carb to the engine. you would fix this by adjusting the idle mixture on the carb. the first thing I would do is look for the fuel mixture screw on the carb. im not familiar with your specific model. but the screw is usually found facing down on the bottom of the carb, directly in front of the bowl. when you find it, turn it counter clockwise about 1/2 turn at a time until that flat spot fades away. if that doesnt work, then you will need to up the size of the pilot jet inside the carb. maybe 1 or 2 sizes would be enough. if you replaced the carb with a bigger carb, then you may not be able to fix this problem. in my experience, larger carbs will increase power, but usually throttle response, especially low end, suffers considerably. the reason for this is lower intake velocity and vacuum. basically, with a bigger carb it takes a second longer for the fuel to be drawn from the carb and properly atomize with the air. hope this helps.if I overlooked anything let me know! some more info on the engine/modifications and carb/jet sizes would help too. good luck.

SOURCE: 2001 yamaha ttr 250, starts, idles ok, bogs at acceleration

I have the same bike and same problem. Check the intake hose that connects the carb to the motor it may have a crack mine did and lost power when the bike warmed up. They don't make a replacement hose for it so I am using a rubber plumbers coupling with hose clamps. Might work? The hose is inch and a half diameter and about three inches long try that maybe. Good luck If it makes a chirping sound when the bike gets warm it's probably that hose sucking in air and screwingup your mixture.