Well I guess that CCW could not call it a 250cc big bore kit since they use to claim that the stock engine is 250cc.


These guys are still advertising "Change your CG250 67mm air cooled engine (167FMM)to 70mm bore,Kit include piston kit and gasket".
http://www.chinese-parts-canada.com/4_stroke_big_bore_kits.html
I never have gotten an answer from them.

Anyway, I'm happy with my DFs performance for now.

Maybe DF will put the overhead cam engine in the Df250RTB's next generation.