nice find and enjoy the fun of getting parts.

That piston is toast! if the bore is not damaged you were lucky. Piston kits still available if you want to take a punt and just change that only. https://www.forged-pistons.co.uk/webshop/wossner-motorcycle-forged-pistons/wossner-offroad-motorcycle-forged-pistons/honda/2-stroke/crm250-all-8071da-for...

welcome.
upload pics to a host like http://tinypic.com/ then post the link here

manual in my Dropbox here https://www.dropbox.com/s/1vntxlr8ke60h ... R.zip?dl=0

welcome. This forum is a wealth of knowledge

could have been damaged on install

Just use the correct size bearing to match your Wossner pin to your TRX sized rod.

looks like 26mm.
https://www.ebay.co.uk/sch/i.html?_from ... r&_sacat=0

Try giving leisure trail a ring they will know or could sell you one. Mine is an AR and will be well worn so pointless measuring it.

CRM one fits loads of bikes too but not a CRF in the list.
https://www.bike-parts-honda.com/microf ... 7-023.html

CRF one fits a lot of bikes. No mention of CRM in list though.
https://www.bike-parts-honda.com/microf ... L-300.html

it is indeed. I just use tinypic but keep a copy in googledrive.
I have my reg/reg mounted where the horn normally is and move the horn to behind the rad.

Welcome to the world of AR ownership. Just make sure the swingarm bolt is removed and lubed regular really and do the linkage while you are at it. I am sure though in Nevada you wont be dealing with much in the way of corrosion issues. Its hot there though and the AR has tiny rads so might be worth ...

its meant to be lol

just post the link?
https://drive.google.com/file/d/13jAjLk ... sp=sharing