Author Topic: This Is The EPIC Soggs 92K75 MAGA Thread  (Read 21973 times)

Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #700 on: September 28, 2019, 02:15:08 PM »
Ok. Replaced the splines on the prop shaft 1050 miles ago. They are now already worn!  It sure they were made of hardened Steel like the original set.
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Offline Martin

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #701 on: September 28, 2019, 04:25:31 PM »
Send a picture to whoever you purchased the splines off, and see what they say.
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Offline John Lang

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #702 on: September 28, 2019, 04:36:51 PM »
If you replaced the spline collar without replacing the worn FD pinion you were asking for trouble.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #703 on: September 28, 2019, 06:47:13 PM »
Send a picture to whoever you purchased the splines off, and see what they say.
Regards Martin.
Yes. I did earlier. Thing is, the replacement splines weren’t made of hardened steel like originals are.In my opinion, they should have lasted longer regardless of the final drive spline condition.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #704 on: September 28, 2019, 06:48:36 PM »
If you replaced the spline collar without replacing the worn FD pinion you were asking for trouble.
please see my reply to Martin. But yes, I know what you mean.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #705 on: September 29, 2019, 03:43:05 AM »
Ok. Looking for a good final drive now, and do it all over again over the winter. I want to get this drive shaft issue sorted, as I want to do a fair few miles on the bike next year around Cornwall, as my disabled brother is moving there to be closer to his new born grandchildren. The bike is my transport of choice, as I need to keep the miles down on my work van.
The K75c is great to ride,so easy, too, but I can’t have the drive components let me down. I’m a bit short of cash at the moment, as winter is looming up and my work as a gardener, will start to get scarce.
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Offline volador

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #706 on: October 02, 2019, 05:57:11 PM »
Yes. I did earlier. Thing is, the replacement splines weren’t made of hardened steel like originals are.In my opinion, they should have lasted longer regardless of the final drive spline condition.
Guess you proved replacement spline collar made of recycled Datsun bumper poorly heat treated is a no go
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #707 on: October 03, 2019, 12:15:31 AM »
Guess you proved replacement spline collar made of recycled Datsun bumper poorly heat treated is a no go
Certainly looks that way! However, I did email the company (Motobins),where I  bought them from, and they said they have sold loads and have had no complaints. But I could have had a ‘bad’ set, apparently. So they are sending me another one, free.
I also have managed to find and purchase another final drive in California on fleabay, which should be here near the end of this month. £249.00 with shipping, from a 35,000 mile bike.($303.00).
The new splines look a lighter colour than ones that I have seen on other shafts, so I am wondering if they are a softer metal that could be hardened with heat and quashing in oil.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #708 on: October 03, 2019, 12:21:24 AM »
The new set that I bought V a library pic of an original set. The original look much darker, ie denser, stronger material
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Offline The Mighty Gryphon

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #709 on: October 03, 2019, 08:20:00 AM »
The first set probably were parkerized or some such to prevent corrosion while the replacement wasn't.

I would contact Motobins for heat treat instructions.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #710 on: October 03, 2019, 08:25:04 AM »
The first set probably were parkerized or some such to prevent corrosion while the replacement wasn't.

I would contact Motobins for heat treat instructions.
Hi.
Just got in from work, and here they are!
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #711 on: October 03, 2019, 08:33:27 AM »
The first set probably were parkerized or some such to prevent corrosion while the replacement wasn't.

I would contact Motobins for heat treat instructions.
Emailed Motobins. They say they don’t know of any ‘hardening’ process involved with these.
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Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #712 on: October 03, 2019, 10:29:40 AM »
The edge of a metal file will easily cut a notch in an unhardened part but not in a hardened part. Email them for instructions covering how the parts are welded together. Hardened and mild steel parts are welded together similarly as cast iron parts are welded. Temperature is raised to a level based on the metals involved, the parts are welded then cooled slowly. Specific welding rods or filler wire are used. Close finish fit of the driveshaft and pinion gear shaft is essential for reasonable lifespan of the parts.

What happened to the lubrication of the splined sleeve? Did much of it migrate onto the silicone plug?
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #713 on: October 03, 2019, 12:07:15 PM »
The edge of a metal file will easily cut a notch in an unhardened part but not in a hardened part. Email them for instructions covering how the parts are welded together. Hardened and mild steel parts are welded together similarly as cast iron parts are welded. Temperature is raised to a level based on the metals involved, the parts are welded then cooled slowly. Specific welding rods or filler wire are used. Close finish fit of the driveshaft and pinion gear shaft is essential for reasonable lifespan of the parts.

What happened to the lubrication of the splined sleeve? Did much of it migrate onto the silicone plug?
Dunno about the migration. I’ve only just done the silicone plug, and put it back together.
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