Freestyle 2nd snapped Skat pumpshaft

[CARBONX2]

Anyone else snapped Skat Kawi pumpshafts?
13 months since the last one snapped

 

[x2mafia]

Any chance your over tightening that puppy? What the hell are you running for a motor

 

[CARBONX2]

I do tighten it a fair bit as I used have problems with prop spinning loose. I think the shaft must be stainless steel or similar that can't take stretch. DASA1200

 

[speedysprocket]

Is that just a stub shaft like stock kawi pumps or is it like a Yamaha shaft?

 

[CARBONX2]

It is a Maxx Kawi 155 SB pump. SB stub-shaft, this one is genuine Skat

 

[x2mafia]

alignment issue maybe? was that prop in the pump when it sheared it the first time?

 

[CARBONX2]

Different prop. Will check alignment

 

[x2mafia]

I just cant think of anything else if that was a skat shaft in the pump. its gotta be binding up just enough to fatigue it over time. And it could also be the hub alignment in the pump itself. I am by no means questioning maxx craftsmanship but those things are hand welded correct?

 

[CARBONX2]

Pump spins easily by hand with prop tightened in it, and clearance was 0.3mm, so pump is good.

 

[cookn]

we have snapped shortened couch shafts before but those are yamaha style. The are made from a hardened stainless and I think the main culprit was poor weld penetration. Has the kawasaki style been welded or is it just machined

 

[x2mafia]

Then i guess your just a better tuner and motor builder than everyone else lol

 

[CARBONX2]

Maybe, it is running a custom pipe, LOL
It is Skat SB pump-shaft, stock as received.

 

[x2mafia]

Maybe, it is running a custom pipe, LOL
It is Skat SB pump-shaft, stock as received.

poor man b pipe or dried out stock muffler? did you drill your waterbox lol

 

[CARBONX2]

poor man b pipe or dried out stock muffler? did you drill your waterbox lol

Well it does perform better than a V2, in back to back testing

 

[x2mafia]

pics!

 

[CARBONX2]

All you are allowed to see for now, still a prototype so not pretty

 

[x2mafia]

OMG thats so ugly!

lol just kidding thats SICK. Ive seen the insides of gen 2's that thing looks massive! I dont think youll get any criticism from anybody on that chamber.

 

[CARBONX2]

To give you context of the pipe, my engine mounts are set back 3"
Mid-section is a about the same diameter as V2, tuned length is longer and totally different cone angles

 

[x2mafia]

Ill take one!

 

[623pwr]

It must be binding somewhere underload. Maybe put some new pump bearings in or see if they are loose in the pump? Sweet looking pipe by the way.