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Old 04-10-2017, 12:43 AM   #1 (permalink)
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Default Stripped motor spline

Looking for hardened motor spline and RDM shafts
See pictures of damaged motor spline and RDM shaft
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Old 04-10-2017, 09:45 AM   #2 (permalink)
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Originally Posted by Deep Karma View Post
Looking for hardened motor spline and RDM shafts
See pictures of damaged motor spline and RDM shaft

That's a common problem on Karma's and depending on your location everyone here will tell you to contact HarleyGuy (FL) or FiskerPhilly (PA/NJ).
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Old 04-11-2017, 04:08 PM   #3 (permalink)
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Good idea, I am also looking into some local machine shops to manufacture a new splines and RDM shaft
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Old 04-12-2017, 07:35 AM   #4 (permalink)
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Originally Posted by Deep Karma View Post
Good idea, I am also looking into some local machine shops to manufacture a new splines and RDM shaft
Don't waste your time having them machine a set it's a very costly process if you plan on rebuilding the motors on your own it's now a cut and dry process.If you want to purchase the shafts and attempt the rebuild contact Joe . I suggest you ship him the motors and have him rebuild them. If the Shaft on the RDM is spun out you have an additional problem.
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Old 04-12-2017, 10:02 AM   #5 (permalink)
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I did rebuilt the whole thing for much cheaper and results are awesome. The actual genuine splines are of a very poor quality. Tolerance is way too high, male spline is too short, there is no centraliser and the angle of the splines are too low.

We rebuilt both female and male and changed the design. No vibration, no sounds, and we add alsmost one inch to the lenght of the male spline. I don't believe the hardness is the only problem, but tolerance seem to be the main one. I measured at least 1/4 inch of longitudinal movement with an intact spline.

cheers
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Old 04-12-2017, 04:59 PM   #6 (permalink)
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I did rebuilt the whole thing for much cheaper and results are awesome. The actual genuine splines are of a very poor quality. Tolerance is way too high, male spline is too short, there is no centraliser and the angle of the splines are too low.

We rebuilt both female and male and changed the design. No vibration, no sounds, and we add alsmost one inch to the lenght of the male spline. I don't believe the hardness is the only problem, but tolerance seem to be the main one. I measured at least 1/4 inch of longitudinal movement with an intact spline.

cheers
Thanks for the useful info

Did you use a local Montreal machine shop to rebuilt both the female and male shafts?

What was the approximate cost I should expect to pay?
I am located in Vancouver and there are some good local machine shops.
I like the idea of adding some extra length to the male shaft.
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Old 04-12-2017, 05:12 PM   #7 (permalink)
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Originally Posted by Harleyguy View Post
Don't waste your time having them machine a set it's a very costly process if you plan on rebuilding the motors on your own it's now a cut and dry process.If you want to purchase the shafts and attempt the rebuild contact Joe . I suggest you ship him the motors and have him rebuild them. If the Shaft on the RDM is spun out you have an additional problem.
The parts department of the local dealer quoted me $10,000 for each new motor and $1200 for each new male shaft, not including labour, so I figure that I can spend some time and effort into rebuilding them myself. They do not sell the female shaft separately but will supply the male shaft.
I have already taken the motors and RDM apart so I am committed.
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Old 04-12-2017, 05:36 PM   #8 (permalink)
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Originally Posted by Deep Karma View Post
Thanks for the useful info

Did you use a local Montreal machine shop to rebuilt both the female and male shafts?

What was the approximate cost I should expect to pay?
I am located in Vancouver and there are some good local machine shops.
I like the idea of adding some extra length to the male shaft.


I used a machine shop in QC city named Engrenage LB (http://engrenagelb.ca/). These guys are specialised in gears and precision stuff. They kept all the engineering details for further repairs if you need. So you can ask them all the parts and that will be easy.

For the motor, you cannot just remove the female shaft and put it back on place. You need an electric motor shop for removing the femal splines, and rebalancing the motors with the new splines. I used Electric Motor PMR (http://www.moteurspmr.com/) here in QC. Perfect job from both guys.

Cost me 2 000 $CAN for replacing the female splines in the 2 motors, plus 3 900 $CAN to rebuilt the RDM. Total of 5 900 $ for the 2 motors and the RDM instead of 16 000 $, but in best shape than a new. I did the job myself to remove the whole stuff.

Hope this help.
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Old 04-13-2017, 12:39 AM   #9 (permalink)
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Originally Posted by hydroressources View Post
I used a machine shop in QC city named Engrenage LB (http://engrenagelb.ca/). These guys are specialised in gears and precision stuff. They kept all the engineering details for further repairs if you need. So you can ask them all the parts and that will be easy.

For the motor, you cannot just remove the female shaft and put it back on place. You need an electric motor shop for removing the femal splines, and rebalancing the motors with the new splines. I used Electric Motor PMR (http://www.moteurspmr.com/) here in QC. Perfect job from both guys.

Cost me 2 000 $CAN for replacing the female splines in the 2 motors, plus 3 900 $CAN to rebuilt the RDM. Total of 5 900 $ for the 2 motors and the RDM instead of 16 000 $, but in best shape than a new. I did the job myself to remove the whole stuff.

Hope this help.
Thanks for all the info, it will be very helpful.
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