Any way to upgrade 90-93 SN midshaft?

[yamijumpn]

Through much reading I know that the 90-93 SN superjets have a weak rubber to housing/bearing area which makes them tear apart easily. I also read that you want to avoid these for any sort of builds. Problem is then what do guys do with SN skis from 90-93 with powerful builds? I have to get my ski from the cabin nxt weekend to verify but I am pretty sure my ski is a 93 and on my last ride got some vibrations in the tray. I figure its the splines more than likely since nothing was caught in the pump upon inspection and winterizing.

Any advice on upgrades? Buy oem left over stock?

 

[smoofers]

The only difference between the '94+ mid shafts and the '90-93 is the coupler thread size and housing. They both use the same bearing (same shaft diameter) and the midshaft splines stay the same. Make sense?

I upgraded my housing to an RHAAS unit with blue urethane. I have no doubts about its toughness. I am also using a 94+ midshaft in it to a set of Cold Fusion couplers.