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: 1997 yamaha waverunner 3
My 97 gp760 did this. I checked almost everything. Replace or clean your plugs, then run carb cleaner through your fuel filter both ways, and then spray carb cleaner into the fuel line from the fuel filter to the carbs. Run 10 minutes, more carb cleaner into the fuel line, and run it 15 more minutes. Then zip tie fuel lines at the fuel filter. I figure there was trash or buildup in the carb. Its easier than rebuilding the carb. Try it. Daniel at the MEXPIPE Pto Escondido Oaxaca.
SOURCE: 1985 yamaha moto 4 200 power surges
Check the carbs if all jets are well placed, needles all at same height, float levels equal, collars between carbs and cil head all tight, rubbers not punctured or broken...
SOURCE: 2001 yamaha ttr 250, starts, idles ok, bogs at acceleration
Has the bike been stored for any long length of time?
old fuel in the carburetor will turn to a varnish like residue blocking the jets,or possibly water in the carburetor.
Testimonial: "The bike was not stored and was ridden regularly, but it still sounds like it could be the carburetor. Thanks for your insight."
SOURCE: Yamaha 2001 ttr 250. Bogs above half speed, under load
I have the same problems with my 1999 TTR 250, were you able to find out anything?
Walt
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