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Discussion Starter #1
Hey guys still having sort of a problem with my tw. It's been running great but every once in a while it will bog down .... Especially lately in 5th gear cruising at around 35-40 it will sort of sputter as I'm going ... It feels like a loss of power and it does it for a bit then stops, then will do it again. The carb is pretty much brand new and was just cleaned along with the tank, any ideas would be greatly appreciated, thanks
 

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Pretty much new? Might be running lean. The air/fuel mixture screw should be around 2 1/2 turns out.
 

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Discussion Starter #4
Ok, and the fuel air mixture screw is the small brass one correct and yes it is 2 1/2 out.. And no there isn't a fuel filter on there. Could that really be cause cause of that. It really only does it at high rpm...
 

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I had the same problem with my Razz I tried cleaning the carb, cleaned the tank, messed with the electric stuff but all I had to do was put the airbox on it. :p
 

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Take the carb off and check and clean every passageway, hole where fuel can possibility pass through and double check again. Also check fuel flow from the tank, should be a good steady stream. I had a Polaris ATV that had shavings in the carb since new, cleaned it out and ran good.
 

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Was the air box missing... Or just on incorrect in your case?
I just got it and it was in a pile of plastics and lights so it was my fault.
 

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There was a thread on the little piece of foam on the bottom of the seat and what it's for.The foam is there to block the wind from forming a vacuum and sucking the air out of the carb at higher speeds and causing the very same problem.
Something to look into.
 

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If you take the carb apart spend $5 or whatever and buy a brand new #114 jet and replace the one that is in there. I don't care how good it looks, how few miles are on the bike, etc., if you have a 1988 carb replace that jet. I did both of my 1987 TW's that were running very poorly at high speeds and it made a world of difference. Good luck. Tony
 

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Discussion Starter #11
Hey guys not sure if this will help but the carb is new. The previous owner must have replaced the original with this... There's a little stick on it that says for motorcycle race only... Is it possible the jets are too lean ... I ordered a 114 and am going to put that on once it comes.
 
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