Bearing puller?

Hi frankster, I hate to be the bearer of bad news but your in a world of pain buddy, do not attempt to remove this bearing with a puller as it has a c clip type retainer running around the outter race, the motor has to be split into two to remove this bearing, I will try edit a picture now to help you understand and upload.

 

Heres a image from my motor for you to refer to and a google image of the type of bearing

 

crank cases split...same as the gsxr for the same problem..wish there was a quick fix..I've not found one but if you do please let on all you know..the grim reaper but I for one are wishing u find a better way....try this first though as it hasn't failed me yet..oxcyacetalane burner to the cases..heat up just enough to give yield..immediately place ice on the output shaft (about 60 secs but you'll hear it ping or tick as the metals contract)..drive a soft punch into the back bearing face and shock free..offending bearing should just drop out as its compression/inference fit..i'm not 100pc sure this will work on your engine but check the schematics and as inference fit this bearing was pressed in by the factory..other option select neutral run it till the fan cuts in then do the same..cool the output shaft with ice.. what your looking for is the maximum differential between the two to aid removal..wish I could be of more help and I don't know the ins and outs of the zxr 250..yet but basic mechanics i'd give it a go prior to splitting the engine..min four or five hours on the bench all told..I for one will be watching this thread with aplomb..good luck and please let us know how you get on..

Cheers si

 

Yep, I came to the same conclusion, looks like the cases have to come apart for that bearing to be replaced, I checked the part number for the seal I have and its a seal for the gear change shaft

 

Hi guys I am sure it needs to be split do not try bearing pullers, heat ect. as it will cause more damage then has already been done, if you refer to my pics you will see the type of bearing and clip, each side of the case has a small grove in it to accomodate for the clip, it prevents the bearing from just coming out. One thing i'd check would be the gearbox shaft for straightness once out, and the housing the bearing,seal ect run in, as once that bearing let go that shaft would have went nuts!

 

Good luck buddy hope works out sorry bout wrong info no familiar with this bike

 

Agreed with murdo, bearings suit different applications, this deffenetly needs a open bearing for the lubrication.

 

Some bearings aren't sealed but need packing with grease due to no other source of lube but can't be sealed

 

If that black circular object in the picture, on the red checker plate, is the one in question. I hate to say it but that is an oil seal, not a bearing dust cover seal. With luck it will have a set of numbers on it eg. 43 - 35 - 6 indicating the seal size. Bearing suppliers should have one available.

I would suggest when heating the inner race of the bearing, heat only one small section across the race. that way the race will expand in one place and come loose. If you heat the entire race it will all expand and actually get tighter on the shaft. How do I know this, 30 years as a maintenance fitter, fixing broken machines.

 

may aswell do valve clearances and timing chain if your taking it apart then.