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xM0NSTERRR 08-08-2012 11:06 PM

Need help splitting case on 93 Kx80 big wheel
Well my crank bearings keep getting seized on the up stroke. So I need to replace them but no case splitter. So I was thinking can I heat the middle race of the bearing with a torch to loosen it up and split the cases or can I use a rubber mallet. And also how do I remove the fly wheel without the puller. This is a 1993 Kx 80 big wheel

arnego2 08-09-2012 04:31 AM

You need at least a flywheel puller to split the engine.

PawPaw 08-09-2012 10:07 AM

No heat!!!!!!!!
No mallet!!!!!
Get a flywheel puller for a few dollars or risk big dollars if you screw up the flywheel or the crank.

Get a case splitter so you can do the job correctly!

Do you have a service manual? If not get one!

Paw Paw

xM0NSTERRR 08-09-2012 01:13 PM

I will get a flywheel puller but they don't have one that fits my bike I am on

PawPaw 08-09-2012 03:08 PM

Look on e-bay.....Almost all KDX, KX flywheel pullers are the same from about 1980-2000.

Item # 110929813045 It fit's your bike.
Case splitter...# 330747378652

Paw Paw

Randog Leader 08-09-2012 03:46 PM

You will also need some sort of holding tool for the clutch hub. I use a "Grabitt" on most bikes with the usual hub style and I made my own bracket-type holder for my daughter's CR80. It had a different style clutch.

xM0NSTERRR 08-09-2012 04:50 PM

Thanks PawPaw do you think the dealers will have the case splitter and flywheel puller

And randog yes I do need some type of clutch hub holding tool cause I just tried to remove the clutch hub never gonna happen that nut is really tight on there

---------- Post added at 08:50 AM ---------- Previous post was at 08:33 AM ----------

Randog I think my clutch style could be like your daughter's clutch if I know how I will post some pics

PawPaw 08-09-2012 05:16 PM

Ok, some dealers may have them in stock as well as the clutch holding tool, but your dealer may not or may want much higher prices for them. Most can order them too. The one's I showed you are of good quality and name brand tools that will last for years.
RE: Clutch holding tool....I have just used an old clutch metal disk and a pair of vise grips clamped to it through one of the clutch basket slots. I have also taken a couple of old disk and welded a rod on them to do the same thing.
A regular clutch holding tools does a real good job as well.

Paw Paw

ossagp 08-09-2012 10:17 PM

You are going to need the flywheel puller. It is the one I never suggest you wing it on. So far I havent used a case splitter on any of the small KX's, simply heating the case around the bearing socket has always worked for me. If you cant get a case splitter and feel you want one or need one, you can easily modify a flywheel puller or a harmonic balancer puller as well as making one with flat piece of steel, a drill bit, a tap and some bolts.

If you have an air wrench you will not need the clutch holding tool either.

In this case if you just want the crankshaft out you will not even need to take the gears and shafts out. You simly leave them in the clutch side of the case.

xM0NSTERRR 08-10-2012 01:15 AM


Well this is what my clutch looks like ,its different from the others

---------- Post added at 04:57 PM ---------- Previous post was at 03:54 PM ----------

I don't know if the picture showed up but tell me if it does or doesn't

---------- Post added at 05:06 PM ---------- Previous post was at 04:57 PM ----------
Go to that url if the pic didn't show up

Pawpaw what about the stator how would I remove that without one of those impact screwdriver

Ossagp can I just leave the clutch assembly in since I just want to get the crank shaft and bearings out.

---------- Post added at 05:14 PM ---------- Previous post was at 05:06 PM ----------

This has nothing to do with this thread but will this be a problem in performance or anything

---------- Post added at 05:15 PM ---------- Previous post was at 05:14 PM ----------

The pits in piston

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