BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down    Yet another 1985 "hotter cams" thread on Mon 12 Jun 2017 - 3:36

duck

avatar
Life time member
Life time member
I'm still not convinced on this "myth" but have been looking into it some more just out of Kuriosity.

I have two set of cams on hand. One set from a US K100RS manufactured in 7/84 and another set from a 10/85 K100RT. There is a difference in them in the numbers stamped into them. The early ones are marked 125 and 126 while the later ones are 1450125 and 1450126 so apparently they were produced from different molds.

In poking are Fleabay for different countries I was able to make out the numbers on some of the cams up for sale.

On Germany and UK sites I found some 83 and 85 (model year I assume) which have the short numbers and on the Canada site I found some 87s that have the longer number.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

92KK 84WW Olaf


Life time member
Life time member
Has anyone ever checked if they are the same profile and lift?


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 84,100 miles
    

RicK G

avatar
VIP
VIP
Yeah I went through it some years ago and the inlet cams open 20 later on the cams that were for the NA market. Made like that so as to in effect lower the compression ratio by not allowing as much charge into the cylinder, this in turn lowers the combustion temperatures which causes less oxides of nitrogen causing less pollution. The earlier cams AFAIK were never available in US because the K100 was not sold there until 1985.
The US and Australian cams for the 16V engines were the same but the K1200 cams were the same and the so called problems were solved using more advanced ECUs
If you are really lucky the "hotter" cams will deliver around 2 extra horsepower.



Last edited by RicK G on Mon 12 Jun 2017 - 10:22; edited 1 time in total (Reason for editing : Extra info)


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum