KX Riders
Maintenance & Technical => KX250 / KX125 => Topic started by: queen of spodes on August 08, 2014, 12:41:26 PM
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According to this listing (http://www.ebay.com/itm/Motion-Pro-Motorcycle-ATV-Blind-Bearing-Removal-Puller-Tool-Set-08-0292-/270949354999?pt=Motorcycles_Parts_Accessories&hash=item3f15d70df7&vxp=mtr), the Motion Pro Blind Bearing removal tool only goes down to an 8mm collet. The tiny bearing in my KX125 case is either 5 or 5.5mm.
What tool is everyone using to get this tiny bearing out?
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I went through the same thing while rebuilding my 87 KX250 engine...Still need to assemble it. I'll be posting pics soon.
Anyway, I was able take out ALL my bearings, specially the water pump & governor bearing...that tiny one.
(http://i166.photobucket.com/albums/u84/kezard/slidehammer_zpscf6c29ee.jpg)
It's a 1/4" x 20 threaded rod, washer and 3/8" socket, slide hammer.
Grind a groove at the end of the rod and make sure the that gap is thicker than the bearing you want to pull out. Not too big because you don't want to weaken the rod. For the smallest bearing I had to make the tip of the rod thin to get under the bearing.
Once you heat the area, insert the rod through the bearing and hook it underneath. Make sure the case does not move. Now keep sliding the hammer and you should see the bearing starting to creep out. It takes practice, but it does work.
The key to making this work is to apply heat. I used MAPP gas (get it at home depot). Heat the area around the bearing. I went around the bearing about 5-10 times. Move the gas around fairly quick and don't stay in one spot otherwise you might warp the case.
I measured about 160 - 170 deg. if I heat the area, going around about 6=7 times. In fact, pulling bearings out, installing main bearings and believe it or not, installing the crank, and putting both crank cases together I did with a temp of about 170 deg. Plus, freezing the bearings.
Good luck!
dinky,
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nice homemade puller dinky!...love the ingenuity! :-D
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nice homemade puller dinky!...love the ingenuity! :-D
Thx....funds are always low (3 kids, wife, etc,.), so I'd rather make it, than buy it, unless I can't.
I bought my tusk engine case splitter, but well worth the "1" time use.
dinky,
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My puller will accept 1/2 threaded rod, so i usually fashion a hook or weld something to a piece of 1/2 threaded for the small bearings. cheap and effective.
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Here's the bearing in question.
(http://i.imgur.com/IpHbszY.jpg)
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It's a 1/4" x 20 threaded rod, washer and 3/8" socket, slide hammer.
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Thanks, will use your idea. I found a company that sells a 6mm blind bearing puller but its $110.
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Sometimes that little bearing is tough to get out.
If yours gives you problems even with the puller, heat the area around the bearing with a torch...
It will sometimes fall out :-)
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Like I said...heat the area..
I tried to pull those bearings out without heat and no luck.
Once I used the MAPP gas and the slide hammer...presto! Pulled it out with ease.
Again, be careful not to add too much heat.
dinky,
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Sorry Dink... I didn't read your heat statement... :oops:
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Sorry Dink... I didn't read your heat statement... :oops:
No problem...just re-enforcing not to heat too much :-D
dinky,