Results 1 to 8 of 8

Thread: 1977 R100RS Big Motor - How To Tell If It IS a CFO?

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Registered User
    Join Date
    Mar 2003
    Location
    North Georgia Mountains
    Posts
    190

    1977 R100RS Big Motor - How To Tell If It IS a CFO?

    The Big Motor 1977 RS models had 40mm head pipes and big intake valves, and made a fun ride. Had one, blew it up running unleaded gas on old heads and sold it, big mistake.

    I understand that BMW was forced to sell 1977 RS models in California, Florida and Oregon (i.e. CFO) with lower power output, a pollution issue, I suppose.

    I'm looking for a project Big Motor 77 RS and don't want to get stuck with a CFO model. What are the ways to tell if it is a CFO? Measure the head pipes? Is there a 'CFO' marking somewhere, like in the VIN? Any other foolproof clues?

    TY
    Roger Wiles
    roger@rogerwiles.com
    www.rogerwiles.com
    706.897.8266 24/7 Wireless

  2. #2
    Liaison 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    18,201
    CFO should be stamped above the engine VIN by the oil fill hole.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Registered User
    Join Date
    Mar 2003
    Location
    North Georgia Mountains
    Posts
    190

    Cfo ???

    Ahhh !!! Verrrry good. TY!
    Roger Wiles
    roger@rogerwiles.com
    www.rogerwiles.com
    706.897.8266 24/7 Wireless

  4. #4
    Liaison 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    18,201
    Ian Falloon says in his book that the CFO bikes has 38mm exhausts with 40mm clamps plus they had a more restrictive muffler.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  5. #5
    Registered User
    Join Date
    Mar 2003
    Location
    North Georgia Mountains
    Posts
    190

    Thanx Again

    Appreciate the info...
    Roger Wiles
    roger@rogerwiles.com
    www.rogerwiles.com
    706.897.8266 24/7 Wireless

  6. #6
    Rally Rat 1074's Avatar
    Join Date
    Sep 2004
    Location
    Las Vegas, NV
    Posts
    320

    Cfo

    Of course, there's another whole story behind the CFO stamping. When BMW came out with the RS model, all the magazines raved about it but predicted low sales because it was such an expensive bike!
    Well, the consumers proved that to be wrong and sales skyrocketed! When the Chief Financial Officer brought these facts to the board Of Directors, all were so pleased with the figures that they decided to build some special edition bikes, and in his honor, labeled them CFO bikes.
    That's my story and I'm sticking to it, even if April 1st has passed.
    Boxerbruce

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •