2 Re: retrofit? Mon Mar 14, 2022 8:29 pm
Rick G
admin
No
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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived." Dalai Lama
Bikes 1999 K1100 LT with a Big Block 1200
4 Re: retrofit? Tue Mar 15, 2022 5:38 pm
Two Wheels Better
Moderator
There are differences in K100 driveshafts, too. Best to post the year and specific model in your signature line so we can assist with telling which d/s you should source.arbalest wrote:looking for driveshaft for my K100 swingarm and final drive. Found this on Ebay. Will it fit? 2002 K1200 driveshaft.
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"A long ride is the answer to a question you will soon forget!" ~ Anonymous
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT
7 Re: retrofit? Sat Apr 02, 2022 8:25 pm
Rick G
admin
The spline at the rear is quite different.
__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived." Dalai Lama
Bikes 1999 K1100 LT with a Big Block 1200
8 retrofit Sat Apr 02, 2022 8:31 pm
arbalest
Silver member
Thanks. I should have just counted the splines.
9 Re: retrofit? Sat Apr 02, 2022 11:19 pm
92KK 84WW Olaf
Life time member
As said you really need to post the type of bike, year, VIN in your signature.
As far as I know you are looking at three different types just for K100.
Early K100 2v engines have 16 spline driveshaft. This includes naked, RS and RT.
Later K100 2v engines and K75 have 20 spline driveshaft. This also includes naked, SE, RS RT and LT [I am not sure if K75 and K100 are interchangeable]
Later K100 4v engines have Paralever final drive and a different driveshaft. This includes RS but not LT/RT.
Due to the age of the Ks and the increasing likelihood of a final drive having been changed by a previous owner you need to be careful between 16/20 spline driveshafts. 16 spline final drives are getting scarce and RS 31/11 and RT 32/11 on early Ks can get changed to later 20 spline units. If you pick up a matching driveshaft and its final drive unit it will go straight in to yours. No change at the gearbox end.
As far as I know you are looking at three different types just for K100.
Early K100 2v engines have 16 spline driveshaft. This includes naked, RS and RT.
Later K100 2v engines and K75 have 20 spline driveshaft. This also includes naked, SE, RS RT and LT [I am not sure if K75 and K100 are interchangeable]
Later K100 4v engines have Paralever final drive and a different driveshaft. This includes RS but not LT/RT.
Due to the age of the Ks and the increasing likelihood of a final drive having been changed by a previous owner you need to be careful between 16/20 spline driveshafts. 16 spline final drives are getting scarce and RS 31/11 and RT 32/11 on early Ks can get changed to later 20 spline units. If you pick up a matching driveshaft and its final drive unit it will go straight in to yours. No change at the gearbox end.
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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles.
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles
Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
10 retrofit Sun Apr 03, 2022 9:28 am
arbalest
Silver member
My K100 is long gone, due to a bad fabricator. It WAS an early build 85 K100. I bought a swingarm and final drive off Ebay, separate auctions. The final drive I have is a 20 spline. I had a swingarm modified (incorrectly, as it turned out) to fit an airhead frame. The driveshaft had a bad u joint. I had Bruno replace the u joint. I asked him if he could put an airhead flange in the driveshaft. That ultimately led to two problems. I had him put a greasable u joint on the shaft. The welds were quite large and the u joint doesn't even fit the opening at the front end of the swingarm. I had a K swingarm modified, correctly, this time, and now need a stock swingarm that fits the 20 spline final drive, since a front spline adapter is now available. This will allow this mongrel to be fit to my R90 sidecar rig, with the ultimate goal of running car tires all around.
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