Rat_ranger
Coast to Coast
So since I ended up rebuilding the RM to stock, I picked up a cheap no motor YZ250 to stick an XR motor into.
I'm building a 2000 xr motor, 8mm stroke, 66.5mm crf230 piston, atc cylinder for the bigger fins, and undecided on cam.
Starting this out by tearing down the spare crank, and offsetting the rod pin 4mm. I turned a steel plug, pressed it in and welded in 2 spots. Then made a nice fixture from a 6" OD aluminum round 3" long and got to work.
I'm building a 2000 xr motor, 8mm stroke, 66.5mm crf230 piston, atc cylinder for the bigger fins, and undecided on cam.
Starting this out by tearing down the spare crank, and offsetting the rod pin 4mm. I turned a steel plug, pressed it in and welded in 2 spots. Then made a nice fixture from a 6" OD aluminum round 3" long and got to work.