Shift Drum Bearing Change...

Troy V Smith · Posted: Wed Oct 10, 2012 4:55 pm Post subject: Shift Drum Bearing Change...

I obviously screwed myself Evil or Very Mad

- for whatever reason, my shift drum must not have been lined up proper prior to bolting the cases together. Thus, I screwed up the gearshift drum needle bearing!!! Aaarrrrgh! Embarassed

I've never had to change one of these - any suggestions as to getting it out? I usually heat the cases and never have an issue with most bearings, but I bet this one isn't going to be so easy - any suggestions on how to get out the old and in with the new???

Thanks Much...
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Randy Mckee · Posted: Wed Oct 10, 2012 6:22 pm Post subject:

Use something strong yet skinny, like a small screw driver, and you can use the pry hole to get it out.
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Mike Goebel · Posted: Thu Oct 11, 2012 6:58 am Post subject:

I'd still heat the area with a heat gun then do what Randy said.

Mike G.
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Troy V Smith · Posted: Thu Oct 11, 2012 7:32 am Post subject:

Thanks guys - good ideas - going to give them a try later this afternoon and see how it goes. I'll let you know if I get it out, or need a new case half! Mad

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Bill Martin · Posted: Thu Oct 11, 2012 4:26 pm Post subject: don't panic!

Since the bearing is toast anyway, if gentle prying isn't working, you might try a slide hammer with the internal bearing puller attachment. Heat first, anyway.

-bill
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Greg Lindahl · Joined: 13 Jan 2011 Posts: 267

There are tools made to remove "blind" bearings. I've not tried one yet. Another approach that I have seen is using hydraulic action to remove a bearing. Oil, tight fitting piston and sudden pressure (rap with mallet) works.

Troy V Smith · Posted: Thu Oct 11, 2012 8:03 pm Post subject:

Thanks Guys! Got it out without too much trouble. Came out in pieces, but came out! As it turns out the needle bearing cage was actually pretty flimsy and could just pull it out with a pair of pliers. After the cage was gone, I was left with a nice little inner edge which I could pry up on. Heated up the case with the heat gun and just worked around the inner edge. It's out and waiting on the new one! Thanks for the help.
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TVS Motorsports -
"We may not be the fastest on the track...
but we're having the most FUN!"