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As an alternative to euro 2t bikes what would a Yz250 or RM250 2 stroke motocross bike be like as a trail bike? (enduro).

I Would be willing to add a headlight, taillight for Rec rego and change the  gearing/ exhaust etc for more bottom end but what do you think.

Bad idea.

why?

Gearbox will still be shorter and close ratio, fuel tank is smaller and suspension tuned for motocross so harsher than a trail setup. If you ride hard all the time then o.k. but will be a compromise over an enduro 2T bike. Even changing the final gearing and pipe will still have less bottom end so may struggle in snotty stuff.

That said, lots like a motocrosser in the bush so why not. It would have to be cheaper than a euro 2T to make it worthwhile.

Mat has brought up some good points, but (at least for the YZ) they can all be addressed if you choose to do so.

I have an enduro-ised 2T YZ250 (2008) - for me, the bike is great fun to ride in the bush.

To address the shorter ratio gearbox, I fitted a complete set of WR400/426 gears (slight case mods required) and dropped the final drive ratio down to 13/52.

IMS, Clarke and Acerbis all make long range tanks, and you can fit a fuel tap with a reserve to give some warning if you are running low on fuel. I have a 13ltr IMS tank.

The power delivery is smoothed out by adding a heavier flywheel - in my case a 9oz GYTR flywheel. Some people prefer heavier ones, but I still like to be able to feel the snap that the engine produces - although it does make it a bit of a handful in the wet clay at times.

The standard exhaust pipe does a pretty good job of allowing the bike to 'tractor' when needed - I fitted an aftermarket silencer to drop the noise level down.

The rear suspension was able to be adjusted to cope well in standard form, but I modified the shim stacks in the front suspension to soften the low speed initial hit, as it was harsh in standard form.

I initially bough an aftermarket 'lighting' stator for running the lights, but this failed on the first trip out (luckily just a few kms from home), so I replaced it with an LED kit setup from Small Coil Rewinds - not the brightest of lights, but legal for rec rego.

A set of barkbusters, bash plate, pipe guard, and it was good to go!

It is still a motorcross bike, but just a 'softened' version.

Final cost worked out cheaper than getting a euro 2T, but not by much. I also miss out on the electric start, but that hasn't really been an issue so far.

I enjoy customising things, so the conversion work on the YZ was a fun project.

Thanks Flipper, I'm sure Glenboy will appreciate your input.