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1Back to top Go down   K1100 Engine into a K100? Empty K1100 Engine into a K100? Tue Jun 28, 2022 2:14 am

tjh1985

tjh1985
Silver member
Silver member
Without going into a long backstory, I had a custom ‘85 K100 built a couple years back. The custom work was very well done, but the bike engine was very high and now I find myself needing to replace the engine because it would need a complete rebuild and I happen to have a low-mile K1100 parts bike I can use.

I’ve never done an engine swap and looking for any knowledge, wisdom, or key content to reference (video, blog, notes on a napkin) before I do anything else.

Will I need other/special parts to accomplish this and if so what are they and or where do I learn what they are.

Any help guidance, direction would be a life saver. I have been unable to go for a ride in over a year and my soul is dying.

Thank you

Thomas

    

2Back to top Go down   K1100 Engine into a K100? Empty Re: K1100 Engine into a K100? Tue Jun 28, 2022 5:17 am

92KK 84WW Olaf

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You are going to need a lot of wiring [I suggest you get the K1100 loom as well] as there are many subtle differences. The 85 K has an ignition control unit and a fuel injection control unit. The 16v engines have a single motronic unit. You could swap in the complete intake side, motronic unit, injectors etc but you should have all those.

The extent of all this is going to dend on what your custom K100 is like so you need to pop up some information on this.

You will have to make some modifications on the fuel tank side as the connectors etc differ if you have a bolted on fuel tank found on the early 85 K100.

Your clocks will differ.

As an aside you can swap the engine, gearbox and complete drive train with the rear disc, caliper, shock, stand assembly, intakes, air box, etc etc! Or just the engine.

Watch out for engine mountings and shims.


__________________________________________________
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 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 49,840 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 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
    

3Back to top Go down   K1100 Engine into a K100? Empty Re: K1100 Engine into a K100? Tue Jun 28, 2022 10:06 am

Laitch

Laitch
Life time member
Life time member
tjh1985 wrote:I find myself needing to replace the engine because it would need a complete rebuild . . .
Without going into a long backstory, what's wrong with the 2V engine—crank, piston, valve or bearing failure; hole in the case?

Olaf has pretty much laid out the challenges facing you. The two bikes' frames differ so measuring and comparing mounting points and clearances is essential unless a hero who has done this conversion appears, cape and all, to deliver the specs; however, verify that the hero isn't a precocious 13-year old hypothesizing from a backyard treehouse via wi-fi. Smile


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1995 K75 81,000 miles
K1100 Engine into a K100? Usa-lo10
    

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