TM 300EN Carb. Year model differences and experience

Hey so I don't own a 300, I have a 144 on the previous gen frame and a guy I ride with sometimes has a 2021 en300 carb. But I could probably help with a couple of your questions.

1. The only meaningful change after 2022 was 2024+ have a 9mm clutch master which makes the pull lighter and 2024+ are supposed to have fixed the PV reset thing. I think 2025s get a slightly different shock linkage (couple mms lower).

2. There's a fix for the power valve which makes it so once you start it, and the PV does its calibration, as long as the switch is on it will stay calibrated when you kill the motor and restart. Think of it like a key on a dual sport.  https://www.getdirtydirtbikes.com/product-page/power-valve-arming-switch The only slight downside is you need to switch it off at the end of the day or it'll drain your battery. Kind of inconvenient. If I were you, I'd ask the guy selling it if he notices it and/or if he has done anything for it. It apparently affects injected bikes more than carb bikes but can happen on both. It's also only a 250/300 problem. Doesn't happen on my small bore.

3. Don't have enough experience on the 300 to tell you, it's a very different bike to an X Trainer in almost every way though.

4. They come with different tank options, a 9L and a 12L I think. Can be optioned with a fan. 2021+ got wide ratio 6sp transmissions so you're good there (it was optional on 250s/300s from 2019-2021, wide ratio 5sp standard back then), The rear sprocket is proprietary and has 9 bolts, kind of odd at first but makes it so you can get a socket on it from the back between the spokes. Air filter access is your standard under the seat affair. Not near as easy/nice as the Austrian bikes.
 

Subscribed only cuz I dream of owning a TM 300 enduro. On my short list of next bikes... I've been restoring playing with 2 older 00's TM 250s and they're just as solid and reliable as any other bike.

I have a 20 and a 24 300 Mx carb. The 20 pv would act up on first start up but was never an issue past first start. The 20 300 also has a lot of time on it and works like a top. The 24 I got late in the season and have 2 rides on. It seems the pv issue is not present but time will tell.

 The 22 and up models air filter cage rides on pegs making filter changes a breeze. It would be nice if you didn’t have to remove the seat but whatever.

 The 9 mm clutch master cylinder has an easier pull than the 10mm but a lot of people prefer where the 10 mm starts to grab at in relation to lever position. 

The 25 models have different linkage and knuckle that lowers the back of the bike a little. If the height of the rear is an issue on the 22 you could have the shock lowered 4mm with a spacer or you could buy the newer linkage and knuckle. 
 

That 22 300en won’t let you down. Top tier bike. That said, a beta xtrainer is an awesome bike. I’m a tm guy but I think about buying an xtrainer all the time. I try justifying it by saying I’ll buy it for my daughter. So much fun free riding in the woods and hill climbing. Pivot turns so easy. The suspension is soft as it gets and the pegs are closer to the ground so it’s not ideal for racing but if you are just messing around in the woods or riding hard enduro type stuff this might be the bike for you.