Bought a 1985 K100Rt and found that the mice had trashed the wiring harness. Looking to buy entire harness.

Easier to ask than research...
Does your bike has ABS brakes? (I think it came in 1988 but....)
Are the plugs for the instrument pod square or rounded on the corners?

Thanks for the reply Crazy Frog. Can't answer the question yet. The dealer is still in the process of disassembling it. He is concerned with the connection to the fuel pump which is round with four pin holes in it. I have a friend who is parting out a 1986 K100RS and we will check the harness match. Hate to have the mechanic build an entire harness.
I don't think it has ABS.

I believe that all the K100 2 valves harness from 1984 to 1987 will work.

Thanks Crazy Frog. I hope you are right as I have enough money tied up in this bike.
I'll keep you posted.

According to MAX BMW fiche my bike with vin no. 0052434 was made in 12/84. Therefore it will require a wiring harness part no. 61111459140. Bikes built prior to 04/85 use this part no.
Bikes built after 04/85 use a different part no.(61111459556)
I'm still hoping someone on the forum might be able to help.
I don't know the difference between the two parts.

I wonder if bikes built after 04/85 are considered a 1986 model year?

For North American models is it generally considered to be the year/model starting with the 9th month of a specific year through the 8th month of the next year. This isn't always the case, for example, when a bike is released as an early year model, and whenever they felt like it, but it applies pretty well for you Norte Americanos.

Look at the tenth digit (from the left, or the eighth digit from the right) of your 17 digit VIN starting with 'W', if your bike was originally specified as a N.A. model, and not a grey market import, then the letter G would signify it being a year/model 1986...

1980 A
1981 B
1982 C
1983 D
1984 E
1985 F
1986 G
1987 H
1988 J
1989 K
1990 L
etc, until they ran out of letters/years and it got more complicated.

Note that they didn't use an 'I' or 'O' or 'Q' in later years because it could have looked too much like another letter or number. This won't apply to early Australian/New Zealand or grey market import models with the K100RS0123456 (for example) type of VIN.

Richard, still looking? No affiliation:

http://cgi.ebay.com/ebaymotors/BMW-K100-RS-K100RS-Used-Original-Wire-Harness-1985-_W0QQcmdZViewItemQQhashZitem19c1cf599cQQitemZ110625773980QQptZMotorcyclesQ5fPartsQ5fAccessories

Thanks everyone for the help. I bought one from a forum member and it is on it's way.
Also Club_C thanks for the tip on e-bay.