I built the exact motor minus the powervalve. ESR does not advertise it on the website. They call it the duners special or something like that. Very good reliable motor that does not over heat like the 370 does. No oversized radiator or excessive piston wear or thin indexed rod. I had the trx 9 porting on mine, but I wished I had gotten the trx 7 porting. It will out pull most of the 350 stock stroke pro-x that I have owned. This motor is designed to be the best setup without sacrificing power and reliability. It might not put out the peak power of a 370 but you will not run 240 degree temps on a hot day like the 370 will. It is a do it all motor imo.
I will mention this about the odd sized stroke. 95% of all the pro-x cylinders out there for sale are for stock stroke. So even if he did need a cylinder the odds of getting one for a 76 or 77mm stroke are only slightly better. I have said this many times before and esr has the right idea. A 3mm stroke is the threshold of reliability and efficiency on a pro-x casting.
While most of you have the right to disagree, I have ridden and tuned this setup and it is a very good combo and will suit all types or riding.
Everyone here knows there are many ways to build a good motor.
Robsessed88 it is a great motor that I know you will like.
