Custom/Hybrid Shorten stock SJ RN driveshaft? Possible or re spline?

[Christian_83]

Hi guys
Im trying to assemble a lenzi carbon hull, the engine is setback around 2 inches so i have you get a shorter driveshaft. The first option that came to my mind is buy one from Chris @ JM, but the shipping to Denmarks dosent come for free. So im thinking is it possible to get a machinist to cut down and reweld the stock driveshaft thoese 2 inches that it need to be shortned?
I guess it cannot be cut and re spline, as the driveshaft that fits into the midshaft is cone shaped?
Thanks

 

[Kawastyler]

Hi guys
Im trying to assemble a lenzi carbon hull, the engine is setback around 2 inches so i have you get a shorter driveshaft. The first option that came to my mind is buy one from Chris @ JM, but the shipping to Denmarks dosent come for free. So im thinking is it possible to get a machinist to cut down and reweld the stock driveshaft thoese 2 inches that it need to be shortned?
I guess it cannot be cut and re spline, as the driveshaft that fits into the midshaft is cone shaped?
Thanks

We had shortened a SXR Driveshaft for a Hullproject years ago with a sleeve outside.
I can make it for you for exchange of you OEM shaft if it 100% in straight axle.


Andy

 

[Kawastyler]

Ps: i think -2"respline not possiple because the oem shaft is thinner after splinesection

 

[Christian_83]

Andy. Im not sure i fully understand you.
Can you make a custom superjet driveshaft, shortned down around 2" in exchange for my straigh stock superjet driveshaft or how?
THanks

 

[Kawastyler]

Andy. Im not sure i fully understand you.
Can you make a custom superjet driveshaft, shortned down around 2" in exchange for my straigh stock superjet driveshaft or how?
THanks

Yes........

 

[Christian_83]

Okai that would be nice. How do you get the shaft shorter? Ive just done some messuarement, it has to be 3.5-4cm shorter than a stock superjet RN driveshaft.
Allso the midshaft needs to be 2.5cm shorter. can you allso shorten this?

 

[Kawastyler]

Okai that would be nice. How do you get the shaft shorter? Ive just done some messuarement, it has to be 3.5-4cm shorter than a stock superjet RN driveshaft.
Allso the midshaft needs to be 2.5cm shorter. can you allso shorten this?

Monday im back from kiteholiday. Then i have to look but i think for 2,5cm its enought to use ADA couplers and shorten this.

Can you give me clearance from crankshaft to midshaft without couplers??
Shorten the midshaft is not possiple i think.

 

[keith t]

Christian, I have an FX1 midshaft that may be shorter

 

[Kawastyler]

For our stroker66e/951seadoo projekt we needed a shorter midshaft. Tryed some different shafts, FX1to i thing. But no fits. The splenes inside shaft were not on the right place on shorter shafts.......

 

[Christian_83]

Hi Andy
Ive just measured the driveshaft, and engine coupler to bulkhead.

On the stock hull, the driveshaft reaches ca. 5cm out from the deepest point (4.5 cm from the surface where the midshaft housing meets the bulkhead)



On the Lenzi hull its around 9.3cm out from the deepest point, around 9cm where the midshaft meets the bulkhead.


Here on the lenzi i got 13cm from the engine coupler end to the bulkhead.



Stock hull bulkhead to engine coupler says 15cm

So i guess this means i need a driveshaft thats 4.5cm shorter than a stock OEM superjet RN driveshaft?
And a midshaft thats 2 cm shorter than stock OEM RN Superjet ?

Thanks Christian