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1985 Honda TRX250 Fourtrax
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Discussion Starter · #1 ·
1985 TRX250 Fourtrax won’t start unless choke is fully engaged (which makes sense) but the throttle also has to be held wide open or it won’t fire. Once started and warmed up it seems to take longer than usual to return to idle after revving. Also, if I give it throttle quickly it revs OK but if I rev gradually it’ll bog. I recent disassembled, cleaned the carb and installed a Shindy rebuild kit. I set the proper float level. Any clues? I have a video but can’t seem to upload.
 

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Welcome to the forum.

Videos have to be uploaded to a video service like VIMEO and the link posted.

Sounds a though it may be a vacuum leak, poor quality fuel (high content of alcohol), tight valves or the carb was not thoroughly cleaned. Kit or not, the parts and internal passages need to be cleaned in a heated solvent and ultrasonically if possible.
 

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1985 Honda TRX250 Fourtrax
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8 Posts
Discussion Starter · #3 ·
I’ve sprayed starting fluid around the carb boot (rpms didn’t spike), the tank is clean, new petcock and fuel is fresh. Next step is to double-check valve clearance.
 
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