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Hello, I just got a 1993 Fourtrax 90 for my son. It was my wifes brothers when he was small, their dad (my father in law) bought it new in 93.

Anyway, when we got it it had been sitting apart (carb was off and apart) for a while. The bowl was corroded and had pin holes in it. I bought a new carb for it and put it on yesterday. Also drained and cleaned out gas tank. I put it all (plastic) back together today. It won't start or stay running unless I hold the throttle open slightly. I drove it around the yard and it runs great but dies when coming to a stop unless you hold the throttle open a little.
The new OEM carb I got from Wincycles on ebay. Everything looks to be the same except the nuts where it attaches to the cylinder. The original carb had a flange with threaded holes and the new carb has 'capture nuts'.

One other thing.....I used the old needle and seat.....not sure if that what its called, the parts (needle, sleeve, spring, & cap) that screw in the top of carb that the throttle cable is attached to. I cleaned it good first with carb cleaner. I used the old one cause I was unsure of how to get the throttle cable off and back on the new one.

I'm assumimg it just needs the idle ajusted but not sure and want to ask before I start turning screws.

Also, Can someone tell me what screw is the idle?? There are two screws right next to each other, one is a recessed screw and the other is a screw with a spring on it. I imagine one is for idle and one is for air/fuel ???????

Any help would be greatly appreciated, I'm trying to get it working and surprize him with it Christmas morning.

Thanks
Aaron
 

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Welcome to the Forums.... Mud99 has a 90 he may can give you some insight.
 

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Discussion Starter #9
Yeah, we have a go kart the kids have been riding but he hates sharing with his older sisters. He'll be REALLY happy......
 

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Your Boy should be walking on cloud 9 when he sees that 90 you got back together for him. I can't help but to remember back when I was a kid where a couple of my friends who had the small Honda's. I couldn't afford anything Honda, but I had an old Mini-Bike. We'd all get together and had a blast!

The older Honda 50's, 70's, and 90's were so well built in the 1970's you still see them around today. If your son cares for the one you all got for him, he'll have a fine piece for years to come. Plus they are basically so simple mechanically, your son can learn from the ground up.

Great job Pop's! I'm quite sure you'll be grinning from ear to ear watching him buzz around on his toy. Way to go......
 
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