Are my my crank bearings shot?

[Sam 78 GS750]

Is this normal that the crank bearings seem stiff like this? They turn easily enough, but don't really "spin freely"... A couple turn more than the others (like the one on the right side). This is after cleaning and oiling the crank... I'm assuming that the races popping off (very end of video) is normal.

If these are shot, how hard is it to replace them? Any Suzuki "Special Tools" involved? Not much in the manual...

[fastbysuzuki]

Are the bearings smooth to turn ( no roughness or gitches) ? if you have oiled them they will not spin as freely as a dry bearing there will be some drag.

[swanny]

Crank bearings are roller bearings, so the race should be off for an efficient cleaning. As was mentioned, when turning the race with your finger, it should be smooth, not rough.

Replacing them is a job for a qualified machine shop.

[Brendan W]

Never heard bearings sound like that.

[Sam 78 GS750]

Thanks guys for all the quick replies. Really helped put me at ease.

They were spinning smoothly. No rough spots or glitches, just seemed really stiff. Just for a sanity check, I popped the races off and cleaned them again. They spun wild and free. Oiled back up, and they were stiff like before. I guess like fastbysuzuki said, it was just drag from being oiled already.

I'm calling it good.

I've had a few of these "is this normal" threads lately. I'm pretty confident wrenching on bikes, but I've never been this deep in an engine before, and I'm trying to do everything right so I don't have to do it again (at least with this bike).

[Sam 78 GS750]

Never heard bearings sound like that.

Mine is the special edition...only came on 78 750s that came off the line in May. Has all kinds of fun stuff like that.

[Brendan W]

Mine is the special edition...only came on 78 750s that came off the line in May. Has all kinds of fun stuff like that.

A 78 you say ? I have an old 45 sounds just like that

[AMK]

A 78 you say ? I have an old 45 sounds just like that

In '78 mine were 8 track. Just a little hiss but they did lock up once in a while.

[Charlie G]

A 78 you say ? I have an old 45 sounds just like that

I bet if you push it backwards is sounds like " Smoke pot, smoke pot, everybody smokes pot....."

[jabcb]

Crank bearings are roller bearings, so the race should be off for an efficient cleaning. As was mentioned, when turning the race with your finger, it should be smooth, not rough.

Replacing them is a job for a qualified machine shop.

For Suzuki two stroke crank bearings, sometimes soaking them in diesel fuel, flushing the fuel out, and re-oiling with bring back bearings.

[Sam 78 GS750]

...word on the street is they're gonna re-release on 180 gram 45.

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