Is a stripped driveshaft inevitable? Cure?

[LBE]

I'm just wondering on Yamahas, is stripping a driveshaft inevitable? I have stripped one on my Blater and it seems like everyone I ride with has stripped one. I know, make sure the little orings on the innershaft are greased and in place, and making sure your motor and pump are shimmed correctly.
I just pulled my FX1 shaft and see verry slight signs of wear. I'm bummed, and don't understand why it is wearing.

Any suggestions? I usually grease the hell out of the splines before putting a pump in. I use a high temp, synthetic, water proff grease. I obviously wouldn't put anytype of "glue" on the splines, but just wondering if there is anything else to try?

Thanks all.

 

[norcal ex]

I put anti seize. i dont know, maybe its a surf thing cause ive never heard or seen it.

 

[special fx]

I've gone through several on my FX-1. I think part of the problem is a design issue and the other part may be poor quality couplers. I checked the run out on my factory couplers and they were awful! This will contribute to vibration and premature wear. I found that my couplers were out of round pretty bad. One was out almost a 1/8" overall and that's rediculous.

The design piece is that with Yamaha the splines are at the front where the most movement is. When the motor dances around on the rubber mounts it's constantly stressing the splines. Kawasaki puts the splines at the rear of the shaft (at the pump end) and every Kawi shaft I've checked out still looks new after many years of use (one was 20 yrs old). With the splines at the rear the affect of the motor movement is minimal. Another reason I'm putting a Kawi driveline in my FX-1, I'm tired of replacing shafts!

 

[Prem1x]

I've only stripped a midshaft once, and I am sure it was because of poor alignment.

Perhaps your hull or bulkhead is flexing?