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Posted

I am desperately searching for a rear propeller shaft (main drive shaft) for a Vitacci EFI 650 / YL650UTV-1. The dealership I bought it from saw me coming - it's been nothing but a headache! I need to replace the entire shaft but *cannot* track one down! Consequently, if anyone has some tips on reforming a deformed yoke (the part that holds the u-joint), I'm all ears!

I can give you pics as well as the whole story of how it happened, but since this is my first post, I figured I'd err on the side of less content initially.

Posted

It used to be possible to buy yokes to weld onto hollow tube driveshafts, and for fitting to prop shafts. Tractor places used to have them or get them for me. There are people that make up driveshafts.

If it's a hollow tube type they just lathe a length of pipe to size, knock the right sized yoke in by about 20mm until it comes up against a shoulder on the yoke, then weld it carefully so it doesn't get out of place. I've done it in my workshop.

Yours will have a sliding join I suppose so it will have to get the shaft cut off carefully, which can be done with a hacksaw as long as you don't damage the squareness of the old tube end. That's not hard though, yo,u just barely cut deep enough to cut the weld, and back by a mill or two perhaps  then break the old yoke out. There'll be a square tube end, with a bit of weld on it, you grind off the weld and then push the new yoke in, aligning it with the yoke on the other end(very important), weld it carefully and it's good as new. If it's lined up, which the shoulder on the yoke and the square end of the tube does, then they are balanced well enough for your use..

Tractor place or a marine place might be able to get you a yoke, or an engineering shop, or a driveshaft and transmission sort of place..

 

 

 

 

Posted

Thank you! Everything's at my shop at work, so I will look into this first thing tomorrow morning. I think you may have just solved it! I'll let you know…

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