BMW K bikes (Bricks)

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92KK 84WW Olaf

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A question on the difference between 8 and 16 valves....

I am looking at HT leads and coils. New coils for 8 valve are expensive....new coils for 16 valve are very much cheaper.

So, is it possible to swap out the HT leads, coils and plugs from an 8 valve and fit the 16 valve coils and leads?

I do have a spare coil set but looking at alternatives.


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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 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

Dai

Dai
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Can of worms Olaf!! Something about coil impedance being too low for the ECU and turning it into toast. Someone else will have the full story somewhere. Rick?


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1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

92KK 84WW Olaf

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Life time member
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Thanks Dai...that's why I asked the question instead of just popping them in....some nice new ones for K1100 for about €50 each.

Bought brake pads Motobins £9 and wondering wow worth a try.

Next task is to fix the time clock and paint the rear of the frame but the problem with that is I like to do it on the patio and a weekend that's good for that is also good for camping.....


__________________________________________________
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 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

RicK G

RicK G
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He's gone walkabout and wont be back till 2025 Laughing 

If you do go down that path you will need to use the whole kit, coil leads and the resistive plugs.
You will also need to use a wire wound resistor on each coil so as to match impedance to the ICU, otherwise it's foof and the final amplifier transistors will disappear in a cloud of blue smoke, then nothing will work.
The primary windings on a 8V coil are about 1 to 1.5 ohm higher resistance than the 16V coil so the resistor will need to be in that area. You will need a resistor for each coil and need to mount them where there is good cooling.
Many cars used this type of resistor to make starting easier by making the system a 9 volt system and leaving the resistor out of the circuit when starting to give a full 12 volts when cranking. Those resistors may be good for the job or at least to rewind and make your own.
I honestly wouldn't go down that path and just buy the original coils.


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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 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

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