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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: mossy173 on January 27, 2015, 07:04:30 PM

Title: How long will these splines last?
Post by: mossy173 on January 27, 2015, 07:04:30 PM: I cracked open the final drive of a fix-up project '87 K75, and the splines are definitely showing some wear.

In the experience of folks here, how many miles are left on these splines?
Title: Re: How long will these splines last?
Post by: orforester on January 27, 2015, 10:12:04 PM: I am by far not in a position to tell you how long they will last, but they look pretty worn out. Makes me wonder what the clutch splines look like? And driveline? I would say it is time to search CL or FleaBay for a replacement and carry it handy. Johnny always seems to have final drive spares and failures!
Title: Re: How long will these splines last?
Post by: johnny on January 28, 2015, 05:16:19 AM: when whacking the throttle on a regular basis something is gonna wear out... tiors drive shafts final drives...

i gotts 2 sets of spare wheels with new tiors... 2 full spare drive shafts... 2 spare final drives... all ready to go...

i say lube it up and commence to whacking and have spares ready to go...

j o
Title: Re: How long will these splines last?
Post by: TX brick on January 28, 2015, 07:42:06 AM: My 91 75RT had 30,000 miles when I bought it. The splines looked like yours. I started lubing the splines with Honda MOLY 60 every time the rear wheel was off. At 60,000 miles they were worse and I sent them off to Bruno for repair. I have since used Guarddog 525 grease.
Title: Re: How long will these splines last?
Post by: TimTyler on January 28, 2015, 11:37:07 AM: Quote from: johnny on January 28, 2015, 05:16:19 AM
i say lube it up and commence to whacking and have spares ready to go...

Yes.
Title: Re: How long will these splines last?
Post by: mossy173 on January 28, 2015, 11:39:53 AM: Quote from: TX brick on January 28, 2015, 07:42:06 AM
My 91 75RT had 30,000 miles when I bought it. The splines looked like yours. I started lubing the splines with Honda MOLY 60 every time the rear wheel was off. At 60,000 miles they were worse and I sent them off to Bruno for repair. I have since used Guarddog 525 grease.

Gosh, if that means I have 30,000 miles on these splines left I'll be a happy camper. Will I know they're on their last legs, or does this sort of thing tend to fail suddenly and completely, stranding me wherever I am?
Title: Re: How long will these splines last?
Post by: TimTyler on January 28, 2015, 11:42:21 AM: Quote from: mossy173 on January 28, 2015, 11:39:53 AM
....stranding me wherever I am?

Yes.
Title: Re: How long will these splines last?
Post by: mossy173 on January 28, 2015, 11:44:37 AM: Ok, I'm good to go. Thanks, this is very helpful!
Title: Re: How long will these splines last?
Post by: mw074 on January 28, 2015, 11:46:49 AM: What does the driveshaft look like? It may be to your advantage to fix it now.
Title: Re: How long will these splines last?
Post by: mossy173 on January 28, 2015, 11:48:32 AM: Quote from: mw074 on January 28, 2015, 11:46:49 AM
What does the driveshaft look like? It may be to your advantage to fix it now.

I haven't had it out yet. What are red flags, other than these splines? Play in the U-joint?
Title: Re: How long will these splines last?
Post by: kioolt on January 28, 2015, 06:35:37 PM: I think you will wear out at least two new rear tires before those splines fail. I say lube it and go. Check it at every tire change. That's what I do with my 91 K100LT.