I'm pretty sure it will work, but maybe I missed something.

Can sell a K100 16V engine to a guy, who has a K100 2V.
He intend to do the swap.
Have the complete wiring, although it's cut somewhere in the middle.
Can fix that.

But here's the other;
What if I remove all wiring from the 16V engine (except the interchangable ones like the sensors hall and temp),
and we connect everything to the original K 2V wiring?

Will that work?

My guess is the engines are the same, except pistons and head.

What you guys think?

Why not just buy a whole 16v bike? yo then get the brakes, the paralever and the wheels. Just so happens that I have one here, and am no so far away from you.

I know that K too...........its a nice one!!!!

Arlina wrote:My guess is the engines are the same, except pistons and head.

What you guys think?

The electronic engine management systems differ.

@ BobT; not the option, not my call on the bike/engine. I sell the engine to a guy with a K100 8V.

@ Laitch; True, but the 8V wiring should work, only have to take the airbox to the 16V engine.
    The sensors should be the same, also the coils.
    Not sure how the engine will handle it.

I have a K1100LT wiring loom with it, and the right computer, shedtime will be longer replacing the loom too.

We were just curious if only the engineswap will work.....
I could try it myself, have the engine, and all parts to build up a K100 8V (RT), but missing time and space.
Clutch replacement of my R1200RT coming up, means, the frontend can stay, all other parts must come off the bike to reach the clutch. 2-day job....
Then, a Zundapp CS50 1970 needs a complete overhaul.
Then, my Caviva SST 350 Ala Verde needs a complete overhaul.
And my boss likes to see me 40 hours a week....

My K is a K1100RS with LT fairing, I replaced the loom  to the LT too, was a nice job

The swap can be done but it is not a straight forward move. Many of the sensors are different the ECU is very different and there is no ignition module on a 16V the throttle position sensor is very different although it appears very similar. there is no AFM on a 16V and the injectors are also different just to name a few.

Figured that out Rick (K100 FB page).
Swap those sensors too, and injectors, what will happen?

You have to have everything apart anyhow so to me it makes more sense to:

a) just buy a K100RS4V as suggested

or

b) swap in K100RS4V wiring while you have things apart

Changing the complete wiring harness would be the easy way. Further to what I mentioned you will need the coils, handlebar switches (different plugs) temp sensor, plug leads, fuel rail and probably more.

@Duck; We know the possibilities, and we have it.
           Was just the question if we can boldly swap the engine without the electrics.

Arlina wrote:@Duck; We know the possibilities, and we have it.
           Was just the question if we can boldly swap the engine without the electrics.

There's really only one way to find out.

I suspect that it is possible though.  I once owned a K1100RS that had been retrofit with a motor from a K1200LT.  The guy I bought it from accomplished it using the K1100 electrics and Motronic.  It ran fine.  The guy I bought it from put quite a few miles on it before selling it and I rode it diagonally across the US.  And it's still running well for its current owner as TWB can attest to.

Purely physically the 16V engine will fit in place of the 8V engine. There are slight differences in sensor connectors, water outlet position (gooseneck), the lack of injector ports in the head of the 16V, & etc. It will need, at the very least, a mix of 16V & 8V injection and ignition components such as the 16V intake boots due to the FI ports being in them. The clutch disc and housing are the same, but the engine breather apparatus is different...

When I fit a K1200RS engine to a K100 (then later K1100) frame, I was very glad to have a nearly complete set of pieces from each model available to me. The result is the Big Block. Let me say there are pieces from all models incorporated to make it go. You can do it, but it is not entirely straightforward.

Now I am attempting to install K12 fuel injection & wiring to a K11 motor in a K100 frame.

As Duck says, the K12LT in my younger brother's K1100RS is still running strong with well over 130,000 miles in total on the combination.

Thanks Duck and TWB

I can't speak to the fuel and ignition systems, but I know for sure that the 16v engine can be very happy with the older 2v exhaust system.  In fact, because of some minor differences, the 2v exhaust will probably fit on the 2v frame better as well.

My sidecar is an '87 K100RS (8V).  I have fitted an 1100 16v.  In my case I fitted the entire engine complete with 1100 throttle bodies and plenum, plus the 1100LT loom and Motronic unit. That way there was no issue with trying to adapt anything to the 8V.  Everything that's meant to work works fine.

The only issues to tidy up still are an ABS unit plug hanging in the breeze (which doesnt concern me at all to be honest) and the Motronic mounting.  In the 1100 it stands vertical bolted next to the 19AH battery.  I'm running a 30AH battery leaving no room there, so its still cable tied to the top of the battery clamp; one day...

I do have intentions of fitting an 1100 into my K100RT, my intention is to fit all of the 8V parts (1100 throttle bodies already fitted minus TPS, AFM, inlet stub) to the 1100 engine and just plug it in to the existing bike.  I already have the bits, it just requires the time/effort.

Al

Back in October last year I was at the Spaghetti (MotoGuzzi) rally in rural Victoria, and earlier at the Geehi Hut campout. There was a bloke at those with a late '80s K100RT using an 1100 engine, and he too had used the 1100's engine loom and Motronic. As far as I recall from playing round with the variations, a K100 chassis loom will click with an 1100 engine loom, ABS and other ancillaries to be considered.