roller bearing removal

Hi Christof,

What you need to do is get a small billet of steal bore the centre out to the same size diameter as the bearing you are taking off then cut it in half heat these two pieces up to 150 degrees C then put the two pieces around the bearing and the sudden intence heat build up should expand the bearing enough so it will slide off but you will need the mass of metal to tranfer the heat quickly, this how you would do it if you bought the proper bearing removal tool. Good luck.

Regards

Sparks.

Save yourself a lot of headache and beg/buy/borrow or make an inner race tool.

Or take it to a KTM or Husaberg workshop who will have one of these tools, and give them the task.

If you insist on doing it without the right tool, and have no plans to use the inner race again I have heard that a quick blast of heat from an oxy/acetylene torch will allow the race to heat rapidly without heat soaking into the crank, and the inner race will drop right off.

Must be Oxy/Acetylene with a large tip to allow quick/intense heating of thethe inner race to heat expand real quick, ie a few seconds.

Apparently small propane torches do not generate heat quick enough to get the job done, as the heat soaks into the crank as you have found.

I understand the above procedure was supposedly standard instruction in earlier KTM 2 stroke workshop manuals for the same design roller bearings,or so I was told, but never verified.