1999 Yamaha Bear Tracker 250 - Carb Help .......

[EliteAviator]

Hey Everyone,

Im new to the site. I just bought a very used 1999 Yamaha Bear Tracker that I new would need a little TLC. I just bought a new Air filter and changed the oil and differential fluid for it. As soon as I had it together it and put the air filter top on it would not start, as if its not getting air. I took off the lid and it started right up. After a few seconds it started spitting up fuel/foam into the air filter box. I took a video of it. Any thoughts would be helpful. Thanks!

[ame=http://www.youtube.com/watch?v=nVOCPnuRpsQ&feature=g-upl]1999 Yamaha Bear Tracker - YouTube[/ame]

[oxidized_black]

i would probably first try cleaning the carb thoroughly, making sure the float needle is good. if not get a rebuild kit and replace everything from the kit. that is a ton of fuel coming back ... i would check all the fuel vent lines too. while you are at it, make sure the crankcase vent line is not plugged and check all venting lines, doesn't take too long to do or fix ...

[EliteAviator]

Awesome, thanks for the reply. Ill get working on it.

[marioweldinginc]

agreed ^^^ where does that tube lead to or is that where the airfilter goes???

[oxidized_black]

here's a manual to look thru ...

 

[marioweldinginc]

I looked through the manual didnt help. Ill look again.

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[marioweldinginc]

Is that tube going to the rear drive case? fuel breather?

the shop manual is unclear as to what it is.

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[oxidized_black]

i'm almost thinking it's a breather tube from the crankcase. i looked on my bikes but i dont have any connections of tubes except for the breather and to the carb. the filter looked like it was in place at the front, and with the amount of discharge coming out, it has to be alot of pressure, like the crankcase not breathing. but the vid is gone now. at first i thought it was oil/mixed/water. not sure mario

[marioweldinginc]

Thats what i was thinking. Im in no way familiar with that bike so thats why i was asking. Wonder if the head gasket or head is shot or cracked and pushing oil/water mix back into the airbox. Or maybe it was underwater and this is the crap coming out.

Im tapping out :-)

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[oxidized_black]

any progress with the vent lines?

[jerod400ex]

its tryin to flood itself so i would say its got somethin to do with your carb

[EliteAviator]

Vent lines were pretty clean. I gave it a carb clean and oil change. Seemed to do the trick. I did notice that the previos owner put way to much oil in it. Also, there was some fuel in the oil. Not sure if that was the main problem. Any ideas why that would happen. I think the guy had this sitting for a long time. I hope thats the reason........Not sure though.

[oxidized_black]

usually fuel in the crankcase is because the petcock is not shut off or the float and or needle are bad

[EliteAviator]

I think I fixed that problem. Hopefully Ill be good from here on out.