[acecarlos]

x2...plus is the question related to Visual (how it looks & why) or Design (engineering, materials performance)?

Carlos

 

[acecarlos]

Everything is different. Both are 2 strokes is about it but a lot of cr parts have been used or made to be used over the years on atc/trx 250r's.

x2...plus from an engineering perspective; they are even more different than most think.

Carlos

 

[acecarlos]

mainly relating to performance.... buddy of mine said they were the same engines but i thought that i had read that there were several differences. ran with a 99 cr the other day and it seemed like it just sounded different? i know there is a good bit of power to weight diff. figured thats why it sounded like it revved so high?

The CR engine does Rev easier, specially easier than the Long Rod 87-89 TRX250R engines. The CR250R IGN also has a much lighter Flywheel and again Revs Easier & Higher...lot's of differences between a TRX/ATC250R & CR250R engines...CB, Stroke (short verses long), Cylinder Porting, Head/Dome, Piston, Cases, Interanls, ect...

Carlos