Just got a 1995 TRX400FM Foreman handle bar controls in to check how similar it is to the 250ES and sadly there's a fair bit of a difference. Besides the already known kill switch operation being backwards, the choke cable lever is a shorter throw, so it will only choke the 250es about 1/2 choke. Might be able to fix that with a different choke cable but I suspect can't do a whole lot about it besides that. It's about 1/4in less pull on the cable than stock. Because of the shorter cable pull, the back cover is also narrower. Besides that, they look to be the same design/build and the choke cable end fits in it just fine besides the total pull length.

The search continues to finding a suitable modern atv with the right combo to build a "new" 250es & sx handle bar controls.

I didn't grab any photos but could if anyone has ideas etc. Trying to find not only a handle bar control that has the right housing, but also is in production yet which is getting pretty limited anymore with the EFI machines.


TLDR; It would work but kill switch is backwards and choke wouldn't work right.