crank bearing removal?
- caseyracing222
- Posts: 569
- Joined: January 28th, 2009, 4:20 pm
crank bearing removal?
Im rebuilding my yz and am having a little trouble getting the old crank bearings out of the cases. I wanted to know what you guys use to remove those bearings.
-Jake
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- Posts: 4394
- Joined: July 4th, 2007, 6:57 pm
- caseyracing222
- Posts: 569
- Joined: January 28th, 2009, 4:20 pm
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- Posts: 4394
- Joined: July 4th, 2007, 6:57 pm
if you cant get them out theres another option. about 4 years ago i made freinds with a mechanic at the honda dealer. he took all the bearings out for like $30. it was good deal considering he took out the bearings for the tranny and crank. then i put the new ones in myself. becareful though, some dealer mechanics are dumbasses
Throw the cases in the oven on 200 degrees celsius,bearings facing down,they will all fall out within a few minutes,worked great for me last winter,I had the new bearings in the freezer and they dropped in without a problem as well while the cases were still hot,it really works great,just get it done fast while the wife/girlfriend is out
1994 Heartless CR500R
1986 KX500
- caseyracing222
- Posts: 569
- Joined: January 28th, 2009, 4:20 pm
What way are you trying to drive the bearings? They are driven out towards the inside of the case. The seal is removed towards the right side cover on one side and the stator on the other. If you're trying to drive the bearing out towards the seal, there's your problem.caseyracing222 wrote:will the dust and oil seal drive out with the bearings? when I get them out I am going to heat the cases with a propane torch and freeze the bearings, also im going to set my crank up on a lathe and polish the shaft to get the bearings to go on a little better
Get some dry ice and the bearing will fall in there. No need to heat the case unless it won't go, then I'd go though oven route.
Stick your crank in the freezer for a couple hours and it will drop in too.
Best of luck.
- caseyracing222
- Posts: 569
- Joined: January 28th, 2009, 4:20 pm
- caseyracing222
- Posts: 569
- Joined: January 28th, 2009, 4:20 pm
Ok I got the clutch side bearing out but I am going to have the local yamaha shop take the other bearing out, press in the new bearings and seals, put my gears in, install my new crank and put the cases back together. I am running out of time to get this motor back together so while the bottom end is being put back together I will ship my top end out to get a new sleeve and will have my buddy reshape the dome on my head and mill it for more compression. thanks again for all the help
-Jake
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- Posts: 4394
- Joined: July 4th, 2007, 6:57 pm
- caseyracing222
- Posts: 569
- Joined: January 28th, 2009, 4:20 pm