I have a 94 JT750 jet ski engine that needs a piston, sleeve (or bore out), connecting rod and crank pin kit. I've never worked on one of these "repairable" crank shafts before and I don't know if I should bore the cylinder or have a sleeve installed, or perhaps purchase a cylinder housing. Is this a repair that is worth doing or should I be looking for a good used engine. I love a challenge, what should I do?