Can anybody tell me what are the major differences between RS 125 cylinders over the years, what are the best ones for speed or torque?
What are the normal changes that are made in the cylinders?
Are the NF cylinders much weaker on dyno than the 95+ NX cylinder?
In my case, can a modified cylinder NF 1990 equate to an NX, or it would be worth the change?
I Know that the engine is not just the cylinder, but would it be worth the change for newer NX cylinder?