Ever had this happen? Crank sleeve came off.

[yamanube]

First time for me, the outer sleeve was wedged in a groove in the coupler. Had to grab it in my vice and hammer it apart.

 

[Little_Franny]

yup, seen it before, from what I gather there were 2 designs, one had a thin sleeve like pictured, the other had a much thicker collar

 

[yamanube]

yup, seen it before, from what I gather there were 2 designs, one had a thin sleeve like pictured, the other had a much thicker collar

Yeah, I looked at a few other cranks/engines I had around here and they had the thick collar (all 61x and 6m6). This came out of a 62t 2006 SJ, the SBT crank I am replacing it with has this thin sleeve as well.
I would have been upset if it wasn't a wasted crank.

 

[JetManiac]

That sleeve is replaceable and available as an OEM replacement part.

 

[DAG]

I blew 2 DASA topends before this issues was found to be the root cause. Evidently it does not happen much but something I always check now. What crank is that? Mine happened on a 10mm crankworks

 

[yamanube]

OEM yamaha, 2006 61x/62t SJ.

 

[yamanube]

Does the coupler have a groove in it that just happens to be exactly in the right spot and the right size or did the sleeve somehow cut it?

 

[kevbo]

That is a thin hardened wear ring. They slip onto the crank and get held firm by the soft aluminum coupler,. Sometimes they will stick to the coupler or just slide off. I clean them and reinstall with a drop of loc-tite.

 

[yamanube]

That is a thin hardened wear ring. They slip onto the crank and get held firm by the soft aluminum coupler,. Sometimes they will stick to the coupler or just slide off. I clean them and reinstall with a drop of loc-tite.

This one ended up a couple/few millimeters inside of the end of the coupler.

 

[yamanube]

That sleeve is replaceable and available as an OEM replacement part.

@JetManiac do you have a PN for one of these thin sleeves (late model crank)? I found 62T-45526-00-00 but I want to verify with somebody who knows for sure.