Engine Rebuild 101
OK, this is a 2002 RC51 SP2 engine rebuild and the steps that went into it.
My engine has about 1.5 seasons of racing on it so we figured it was time for a freshening up. Also next season, I'm going to be playing with the experts so a little more HP would be nice. It would have been nice for this previous season but that's life.
First things first, drain your coolant and oil. Remove the bodywork, exhaust, radiators, rear wheel, shock, and swing arm. Also you will need to remove the airbox, throttle body, and all electrical connections. I have a bike lift so the front wheel was held in place by the clamp. We were then able to rotate the frame up off the engine which was on top of couple of small scissor jacks. Be careful, a RC engine is pretty heavy. It helps to have a couple of buddies around.
(Side note) While your shock is out, now would be a good time to send it out for a rebuild. I expect mine back in a couple of days from Traxxion.
Make sure you have a nice area to work in and be able to store all the parts from your engine. It might be apart for a little while before it's back together, waiting on parts etc. etc.
You might want to figure out ahead of time what you are planning on doing to the engine before you take it out. My plans include removing any of the quieting gears, port the heads & valve job, hi compression pistons, under cut the transmission, and any other little thing to hep make some HP. Also looking at the HRC RC51 service manual, they show a few spots to port in the engine cases. I'm going to do that also.
I'll be updating this as we go along. I'll also add pics when possible.
'07 SV650, '04 FZ1, '02 RC51, '97 XR400, '85 XR4Ti
Last edited by gpz11; 11-24-2007 at 08:46 PM.