KX Riders
Maintenance & Technical => KX250 / KX125 => Topic started by: Kawasakinut on March 20, 2008, 04:01:57 PM
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got my bottom end apart. wondering if i should replace all the bearings within the cases. if so how do i get these bearings out? also should i replace all the seals and how do you tell if the seals are bad? check out the glob of metallic slug in the bottom of the tranny -side- case- (3rd picture).
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How long do you want to own the bike? If you plan on riding/owning it for awhile. I'd replace them all. You can rent a bearing puller from an auto parts store or just buy one from Sears. If I have the cases split, I always replace the bearings. Just cause they are there and easy to reach while the crank is split. I try to avoid splitting the cases more than once a year. The sludge can come from alot of stuff, like the clutch, gear wear, dirt coming through the oil plug. It looks like years of buildup.
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haha question # 2 whats the best way to get the screws out of photo #1 after they are stripped?
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You need an impact driver. Once they are out, tap out the bearings from the other side. It's not always rocket science. lol
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An easyout might be your best bet.
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OK, the THREADS are stripped or where the Phillips screwdriver goes is stripped? I hope you didn't use an electric drill to get those screws out. :-o
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What is the white crap that looks like grease in the first picture?
As ugly as it looks, I would replace all the bearings and seals.
I have had to use a small chiesel on the head of the screw after they'd been rounded, tapping it on one side, then of course replacing the screws.
Motion Pro makes a blind bearing puller, it's kinda spendy, but if your going to do more in the future it's well worth the money.
http://www.motionpro.com/motorcycle/tools/blind_bearing_and_bushing_remover/
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don that is just some white lithium grease. yeah these screws are screwed. f meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!!!
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how did the grease get in there?
Try the chiesel trick, they'll come out, just be paitent
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jeeks i would never think of using an electric drill to remove those screws :wink: :wink:.
don that trick was tight. worked real good. i sprayed the grease in the case bearings to see if they would spin free. they where all gritty and notchy so i have decided to change them all.
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You should have one of those impact drivers around. That screw on the powervalve is a bitch to get out sometimes. You can get them at Sears and most hardware stores. Keep that trick Don gave you in your memory banks.
Get that grease out from inside the tranny. When you assemble everything, use whatever trans fluid to lube the bearings while you assemble it. I use vaseline on seals and o-rings, ect inside the transmissions.
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so how do those seals come out? yes i am full of questions! never dealt with them before.
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There are ways to remove them without a seal puller, but you have to be VERY careful, because you do NOT want to score the aluminum and cause a permanent leak.
I don't recomment using anything other than a seal puller (cheap tool). Back when I was young and money was an issue, I used a flathead driver very very carefully at the top to remove the seals. But, again, I was extremely careful not to touch the case in anyway to avoid a score and permanent leak. I don't recommend this way and would say it is worth the few $ for a seal puller, cause you will find you can use it for any motorcycle or car in the future.
FWIW: http://www.partsamerica.com/ProductDetail.aspx?MfrCode=PBI&MfrPartNumber=648494&CategoryCode=3497
It's worth 6.99 from your local Advanced Auto vs. f**king up your cases.