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Discussion Starter #1
The fuel screw on my trx250x is a PITA to adjust and it likes to fall out. For a while, I've used high temperature tape under the carburetor to prevent the screw from rattling out, but I'm just tired of it. I've found a lot of these after market fuel screws for things like CRF150Rs, but I'm not sure it would work for a trx250x (2014). Does anyone know if the aftermarket screw pictured (bottom) would work, or if there is a similar one meant for the trx250x that would work? The original screw is the top one, but I'm sure you all knew that already (it isn't the exact one, but close enough).
 

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You can put a thin washer between the spring and the rubber o-ring to keep the spring from chewing the o-ring up, then clean the threads on the screw with alcohol real good and put a thin strip of green loctite on those threads. Let it dry then put it back in and adjust it. It won't ever move again until you turn it...
 

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Discussion Starter #3
It would also be nice to have a screw that you could turn easier than the D-shaped screw+tool. I just don't want to throw more money at the OEM screw if I can get a more accessible, better looking, cheaper, and better to tune with screw.
 

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Can you modify the screw for an extended knob? If there is a lot of thick brass on the head, drill a small, shallow hole sized for a roll-pin in the center of it, put some JB-weld in the hole and tap a roll-pin into it. Then you can put any kind of adjuster knob onto the roll-pin stub sticking out that you want.
 

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They dont make one for a trx250x. And they mostlikely never will. The trx250x isnt a quad that really ever gets modified. So very few aftermarket companys make parts. This is generally a beginner quad used to teach people how to ride. But retro's suggestion of making your own is a solid idea. The problem i see with it is the factory screw is brass(very weak) and the aftermarket ones sold are billet aluminum(very very strong). The brass screw will mostlikely break. You can on the other hand get a pre-05 250ex carb rebuild kit and that will have a flat tip adjustable needle. 05 and after they put the D shaped one in to make it harder to adjust it. My .02
 

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Not a bad suggestion! Very inventive! Haha.
 

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Discussion Starter #8
Thanks for all of the suggestions guys. I'll go with the extra washer, loctite, and pre-05 screw. One last thing I'll add is that the o-ring seems to be left behind when the screw, spring, and washer fall out. Should this tell me something about how I should go about fixing it?
 
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