i have a 01 yamaha wolverine 350 i was riding it today and when i got into 3rd gear and hit the throttle it wanted to bog out but if i barely used the throttle it was fine i tried shifting up a gear to see if that was it but it did the same thing in 4th gear so if i go slow its fine if i want to go fast i bogs down and backfires a bit so what could this be any help is appreciated thx

 

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First check the boot that connects the carb to the motor. These have been known to get tears in them and will allow air to get sucked in when you get on the gas. This will cause it to run like you said. Lots of things it could be but there is one option.

 

yes check your spark plug..If it is all dark black you are not getting enough air into your fuel mix,when was the last time you cleaned you air filter??

 

i just bought it used

 

yes it sounds like your air-fuel mix is messed up for some reason,their are a few reason why this can happen..First thing you should do if you are new to quads,buy the Yamaha manual for your machine..and clean your air filter and do all the needed maint.Who knows what the old owner did or did not do to it,change your fluids..oil,filter,differential oil..These are not very hard things to do..Is the machine stock??does it have aftermarket muffler on it??If so there could be a problem with jetting..Or the old owner had a good pipe on it and put the oem back on it to sell it and did not change the main jet back,that would make you bog at top end..But get the manual first and give it a good look over,it can be as much fun as riding them(when you dont snap those cheep Yamaha bolts lol ) be carful on the bolts and screws

 

A bog can be caused by either a lean or rich condition... In your case where it backfires that is caused by a lean condition (can be dangerous for engine life). It can backfire if the timing is off too - not good - means worn timing chain, sprockets etc.

Check for air leaks on the intake manifold, clean an adjust your air system, air filter, carb, gas tank vent etc. Regap your sparkplug as that can change the timing also.

 

it did run perfectly fine before because i have ridin it since i bought this problem just happened recently but i will look into everything and let yall know from ther thanks for the help

 

to of of yall that gave me advice thx i took the carb off and cleaned it out and replaced the spark plug inline fuel filter and air filter and now it doesnt have the problem anymore thx again to yall

 

Good for you, now you can get back on the trails.