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Hello, I just bought a Honda Fourtrax 250 1986. When I bought the ATV the owner had just cleaned the carburetor. I reinstall the carburetor and after the idle was too fast. I adjusted the idle screw but the idle was still too fast. I looked if there was no vaccum leak and nothing was to report. After I check the throttle cable and it was sticking and the throttle cable fall very slowly or he stay upstairs. I then clean that and start the engine. The idle was much better so I wanted to adjust the idle it worked but when I went for a ride the idle came back very high when I put it back to neutral. Do you have ideas Thank you
 

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Fuel starvation, inlet (air) leak, dirty carb, enrichment valve (choke) stuck/sticky.
Can be a number of things really.

Edit: You should look more carefully as to which section you post threads in, this is a vendors section.
General maintenance or TRX subsection would be a better choice. I'll move this thread for you.
 
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