Maintenance & Technical > KX250 / KX125
Splitting cases?
Kawasakinut:
well scratch my last post. i got them cases apart, just beat the clucth side flywheel spindle some more with a small sledge. i'm not using the old flywheel and crank so its all good. well now my whole bikes in pieces and things need cleaned and i got to order some parts. so its still going to be a while till i ride her but i'm n the downhill now.
jimmy v.
Kawasakinut:
well split the cases and looked at everything inside and all the tranny gears are all fine, if anyone cares!!! anyone ever replaced all the bearings in the cases if so how did you get them out?
Kawasakinut:
--- Quote from: don46 on March 07, 2008, 11:08:00 AM ---I don't use a press to put the bottom end back together. I put the crank bearings in the freezer, after the've been in there for quite awhile, I install the seals, then heat the case, being very careful not to damage the seal, once it's hot, go to the freezer and drop a bearing right in. After both sides are installed into the case, i apply 2 stroke oil to the bearing on the clutch side, then heat up a metal slug, or a socket, something with some mass, and I mean heat it up, then set it on the inner bearing race and leave it for about 5 minutes, then take your crank and slide it right through the bearing. The repeat the process for the other side, once the slug is on the bearing I install the tranny shafts, shift forks and put my yamabond on the case half, I have a Kawi crank tool, so I put in between the crank halves and slide the left case right over the crank, it should slide right on, and once its seated completely i'll install the bolts and tighten it down. sometimes the crank isn't quite centered in the cases, with the crank tool installed you can give it a tap to center it and your good to go. the puller to split the cases is probably one of the most critical tools, in most cases the motor hasn't been apart and can be a bear, but with the right puller they come apart easily, Motion Pro makes a good one.
--- End quote ---
cases splitters are $170 so i didnt buy one instead i used a 2lb sledge took awhile but the casses came apart. just hit the flywheeel axle on the clutch side while keeping the motor stationary best part i didn't even have to pay for the hammer!!
don46:
If you keep using a 2 lb. sledge, your going to spend more than $170 to get it fixed. Never, repeat never, beat on the crank ends to take it apart, unless of course yourgoing to junk it and you just want to see what's inside. There's a reason it cost $100-200 in labor to do the bottom end, expensive tools, and giving you the satisfaction of knowing it's right (Ok that depends on who's doing the work).
If you want something that is going to last and run trouble free do it right, I'm not preaching, just expressing an opinion, it's your money and you can spend it on whatever, just bear in mind if you continue to use 2lb sledge hammers your going to be spending it on crankshafts and bearings.
Jeeks:
LOL - The cranks are pretty soft, too. I thought mine was going to mushroom over too big to fit through the inner bearing race. LOL :-D
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