Anyone ever seen a CR450r cylinder?

[Louis Mielke]

I was wondering how different it is from the air cooled 250Rs. And yes I said 450 no 480. Anywho....Also who has original part numbers for the 300R kits? I'm kinda curious about all this air cooled 250r business.

[Trikeaholic]

I have a CR450 motor out in the barn. I guess I could go get the info for you but not for a while. In the winter, I rareley go out there!