Yamaha front drive shaft fix

[WV Hot Rod Rhino]

Ryan's front drive shaft with 35s and portals is starting to slip so we cut one apart to see how it worked and came up with a fix now we're going to test it.

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[Hump]

I like the pin vs welding it. That way you still have a weak link that is cheap. And, if it needs a little more, you could maybe throw another in there beside it.

[WV Hot Rod Rhino]

I like the pin vs welding it. That way you still have a weak link that is cheap. And, if it needs a little more, you could maybe throw another in there beside it.

We got different sizes

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[walkntall]

Kind of like a shear pin on a boat prop? Sounds like a good idea over welding.

[DonkSxS]

So what keeps the two halves from spinning in the sleeve to start with?

[Hump]

I think it's a press fit, so it only slips if it's under a real bad load. My guess is after a few times it gets wore down and it's done.

[DonkSxS]

Ahhh I gotcha

[jimclemjr]

The idea of a shear pin is rational but the implementation may be a challenge to find the correct values if you want it to be the weak link. The shear pins I have seen are on a low HP motor and are brass or a weaker material that is designed to be a quick failure to save a shaft and maybe the prop. If you're willing to risk the diff then use a solid pin. But the torque of a 50 HP/1400 lb machine seems challenging to find a fine line between max application vs saving diff gear teeth or CVs.

[Timmi]

exactly! that's why testing is paramount. you know James won't tolerate it if it doesn't perform as required. testing takes time, so everyone be patient and you will have a quality product in the end.

the implementation may be a challenge to find the correct values if you want it to be the weak link.

[mjd]

Any updates on this