yamaha big bear 400 4x4
#2
yamaha big bear 400 4x4
Hi, my 2006 400 big bear was doing the same as what you are talking about. I had gotten water in my fuel tank - so, I drained the gas, added fresh gas along with a bottle of HEET GAS TREATMENT and did the same things you did and that has fixed my problems!
good luck,
earlthepearl
good luck,
earlthepearl
#3
#4
yamaha big bear 400 4x4
My Bigbear does the same thing. I dont ride it much but it shoots sparks and it backfires alot. I Suggest you take it to your dealer and get the valves adjusted, also see if it has a leak or somethin in the exhaust were its getting more air then it should. I let mine go for so long it broke some of the baffles in my muffler. So make sure you fix it right away.
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