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98 Big Bear 2x4 Moto 4 Issues

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Old 04-05-2011, 10:35 PM
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Question 98 Big Bear 2x4 Moto 4 Issues

ok, I've been away at college and haven't been able to ride at all for the past 3 years. Now i've finally got my own place and I have my bike with me now.

The carb needs to be rebuilt. The reason why I's saying this is because it will start but will idle EXTREMELY HIGH, dangerous RPM's. I've cleaned the carb, but it still idles the same way. And I've tried adjusting. When I kill the bike, fuel drains from the float bowl down out on the ground. It's just getting way to much fuel.
It says Mikuni BTM on the side. I cannot find a rebuild kit for this year and model bike. Is there another bike that has the same carb, or is there a replacement carb I could get. The yamaha place says $400+ for a new carb, but doesn't list a rebuild kit. Can someone please shower me with your knowledge!

On another note... Is there anyone that sells a re-gear kit for the rear end of these bikes? This one is geared SOOOO low.
 
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Old 04-05-2011, 10:42 PM
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on each on of the jets it will have a number on it and you just have to get the same number needle jet then why its getting to much fuel is your needle valve is sticking take it out use fine sand paper on it so it floats freely i had the same problem on my can-am
 
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Old 04-05-2011, 10:52 PM
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I kinda had a hard time understanding your post, no offense. The jets will have an number on them and I have to match it with the correct needle? The needle valve is sticking, causing fuel overflow? I've been out of the 4 wheeler scene a while, so it's like learning a new language again, sorry.
 
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Old 04-05-2011, 11:02 PM
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ya the needle valves that the fuel flows through when it when its running each one will have a number stamped it to the brass the ones that you have, have junk built up init you just have to match the numbers so it will run right and not lean or rich its easy to clean the needle so it floats freely
 
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Old 04-05-2011, 11:05 PM
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So, unscrew each of the jets and needles, then line up the numbers, and then it should run decently?
 
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Old 04-05-2011, 11:15 PM
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yup just unscrew them and replace them with new ones but when putting in the new ones make sure you put them back in the right spot then it should run good
 
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Old 04-05-2011, 11:17 PM
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ok, thanks man. Would you happen to know if a Warrior rebuild kit would work? It appears to be the same carb.
 
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Old 04-05-2011, 11:25 PM
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as long as it has the same needle jets it should work im not famuilar with it but as long as every thing matches up it should work good luck man
 
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Old 04-05-2011, 11:26 PM
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OK, thanks bud
 
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Old 04-05-2011, 11:32 PM
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No problem any other question i might be able to help on i work on them on a daily base at a atv salvage yard but the gearing im not to sure about iv never delt with that
 


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