I know I've read on here that dirtcrasher has or had several 350X engines.
I've seen some 250R engines too but mainly the x engines.
I ran across one in the early 90s in the classified ads in a local paper. $100.....no carb. I put this one (86) on my 85x and still have it.
Brother and I ran across 4 more for about $200-250 each from a high school auto shop. We sold those to guys racing the 250x/300ex back in the day. After one of our buddies smoked them with his 350x/250x machine......they were willing to pay $700-900 for them. Of course his was built by TC racing so they were still getting smoked. He also got his from a high school auto shop which is where many went (high school or vo-tech schools) after they were parted.
I ran across another one in mid-90s for $300 that was listed in the local classifieds. Still sitting on this one for now. If they start fetching much more than $4k....may have to let it go......that's a lot of coke and hookers!
Gave my original 85 engine away to my son's friend who wanted to try put it on a motorcycle. Don't think he made it too far with that project.
I also wondered about other
parts when they were parted. I have a shock and an axle that are pristine and wonder if those were
parts from dismantled trikes. Also got these in the early 90s before the insane prices creeped in.