Yeah, I'd say you could save some money if your using your old setup and cylinders by staying stock stroke. I've got around 80 hp with a very well HJR ported 4m stk cyl and run on pump gas. It runs right there with any 4m serval I've seen and better than the majority of them. But, as I said before, there is a lot more to it than just a well built motor. Intake, carbs, clutch, pipes, tranny, suspension, swingarm, tires, it all matters. Sent from my iPhone using Tapatalk