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Hi all, I need your advise. I just purchased a used 04 Rancher 350 4x4 manual. The bike has been sitting and left outside for awhile. I took it to a reputable bike shop for servicing. The brakes were frozen up and have been fixed, yet they don't seem to respond quick enough compared to other quads I've driven. The shop changed all of the fluids (possibly not brake fluid, need to check). They said the bike had some water in the differential but they flushed it good and filled with quality oil. They also did a tune up.

I drove it tonight a little and noticed that the throttle kind of hesitates at first. Also, it back-fired on me tonight.

The shop thought the carb was good. Do you think it needs more servicing or to be run for awhile and see if it "clears" up?

thanks! Tapp
 

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Did they clean the carb? Sounds like it's running lean. Carb probably needs cleaned. Sounds like it's not getting enough gas if it's hesitating and backfiring. You might try pulling the choke on about half way and see if it runs better. If it does, carb needs to be cleaned. Make sure the gas tank cut off valve and filter isn't about clogged up, also.
 

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Discussion Starter #3
No, they didn't clean the carb. I asked about it but they said it seemed fine to them. It backfired only once and it was coming to a stop. Would any fuel additives help as a substitute for pulling the carb?

Tapp
 

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For a sure shot go for a good cleaning because any vehicule like ATV snowmobile or bike tends to seaze when sitting for a while outside and the carb is a pretty sensitive part of your engine I'm rebuilding mine changing jet and every thing because of bad maintenance by the previous owner...it has been sitting outside under rain, snow then a lot of humidity build up inside the closed parts of the rig....it's like a gun every hole and moving parts has to be realy taken care off...!

You might allready know about this stuf but you should change your servicing shop because a good inspection would have avoid you those trouble!
 

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Yeah, I would take it off and clean it good. I've never had any luck with any kind of fuel additives. When an ATV sits for a while the gas in the bowl of the carb evaporates and it leaves deposits behind. The deposits tend to stop up the jets and air passages and needle valve passage where the gas flows into the carb.
 

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The carb more than likely needs a good cleaning, but you can try some seafoam in the fuel stuff works great you can get it at Autozone
 
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