Hi Ken, Im new to this world. I see your in CT, and you seem like the man to talk to about these engines. I recently purchased an 02 blaster for my son and the thing came with the engine out of it. Missing the Piston, and in 3 pieces. I was going to attempt to reassemble, but Im not sure where to start. Im mechinically inclined, and have the tools, but I really dont want to screw this thing up. I was told it just needed a new piston, but I was also told it was a big bore, Im not sure how to find out what size piston to get, and I was told not to mess with the bottom end, but im a little nervous about rebuilding only part of the motor. Im in CT, ive called a few places but the labor seems pricey, even without the parts, Is this something I should try myself or should I have it done by a pro? Do you do engine rebuilds? Any suggestions? thanks