crank bearings

[heli_brad]

I have a 2000 rm250 and now i need to replace the crank bearings. I found the r/h bearing cage in pieces when i pulled the clutch out. so my question is, how difficult is it to split the case and change these? the engine is already out on the bench. Is it just a matter of splitting it carefully and swapping them or do i need special tools?

 

[76GMC1500]

A lot of people suggest using a case splitter, the can be rigged from a steering wheel pully. I suggest you have the entire crank rebuilt while you've got it out. It's about $150 to rebuild a crank with a new rod and rod bearing. The main bearings and seals run about $60 on top of that.

 

[heli_brad]

do you recommend splitting the case? from what i can tell it doesnt look too bad. or is it something I should leave to the pro's?

 

[MXer666]

splitting the cases isnt that hard to do, it just takes time to make a tool or money to buy one. the main idea is to keep the cases aligned as your pulling them apart.

 

[IndyMX]

I got a steering wheel puller at the autoparts store for 12 bucks, worked great to split the cases.

 

[whenfoxforks-ruled]

The chances of the big end of the rod still being usable,especially since you want maximum life out of your repair,REPLACE all the engine bearings.Check out hotrod,320 for a 125 kit,includes everything except a manual! ps,you would likely never clean all the metal out! Ummm,I have never seen a bearing get by a seal and go in the clutch cover,it usually goes up and out the exhaust. Taking everything out with it! Curious,,