Very helpful video! Picked up an '89 650sx last Fall and it runs good, but needs a port & polish job. May also upgrade to 44mm carb and intake manifold. I'd love to see a video of how your sx runs now. Thanks again!
Excellent! I've got some hull work ahead of me (and a splatter-paint job), then it's time to drop the engine back in! I'll keep you posted on the the progress and eventual outcome of the work. Thanks!
awesome vid, rebuilding my x2 right now because I'm and idiot and didn't do it over the winter. I'd gladly take you up on a woodruff key, mine is completely buggered
I feel your pain. I'm just now getting to the paint job that I intended to have complete before Spring ;-) I'll send you a message so I can mail you a woodruff key.
Thanks for the great video. Picked up a 91’ JS650SX (same model my wife bought new back then). Had to put a new top end in going 1 size over. Trying to find an actual service manual not just the supplement so I can try to put all the hacked lines especially the ground wires I found bolted to the intake but not connected on the other ends! Anyone have some pics of yours 650SX ground wires (not battery) they could share? Enjoy your stand up!
@sweetschoolbus it's pretty important for good compression especially on two strokes when you have scored pistons and cylinders. At 06:55 you can see a scored piston.
Not ideal, I suppose, but fortunately the crank itself has some mass so it likely isn't relying too much on the bearings to withstand the hammering. Also, I'm not necessarily hitting it with much force. The "shock" is more what I'm after to dislodge it from the tapered end. Tensioning with the puller, then whacking with the hammer.
