Results 1 to 12 of 12

Thread: 78 r 80/7 sub frame

  1. #1
    Registered User
    Join Date
    Aug 2008
    Location
    Cape Cod Ma.
    Posts
    288

    78 r 80/7 sub frame

    Hi, I was wondering what attaches to the lower holes on the tabs where the sub frame bolts to the main frame, the upper part of the sub frame?

    Also the upper sub frame bolts that are on the bike are regular bolts, so to get the battery in and out, I have to pull the bolts out to slide the battery by, is this correct?
    the bike is 78 r80/7


    Brian
    Brian

    86 k100rt, 78 r80/7

  2. #2
    Registered User
    Join Date
    Jun 2003
    Location
    Northern Front Range, CO
    Posts
    6,438
    Battery should be able to slide out by moving it forward into the area occupied by the air cleaner assembly, once all the air cleaner stuff (intake tubes, 2 sided clamshell and filter) is removed.

    Lift handle on left side uses up 2 holes, but not sure if that was the missing part/holes you were asking about.
    Ride Safe, Ride Lots

  3. #3
    Administrator 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    13,248
    Brian -

    I'm not sure about the lower bolts, but as for the upper bolts, I remember it well removing the regular sized lead-acid battery. I find I have to remove one of the upper bolts and maybe help spread the frame a skosh. Also, it helps a lot to loosen the undertray bolts that hold the rubber mounts in place as well as the two bolts on the upper sides. This allows for the whole tray to be tilted back and makes sliding the battery out much easier. Yes, getting one of the newer fangled batteries eliminates all this, but I have some comfort in using the stock sized lead-acid battery.
    Kurt -- Forum Administrator ---> 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!

  4. #4
    Registered User
    Join Date
    Dec 2012
    Posts
    1,003
    Hmmmm>

    How big is a "skosh"?
    "The difference between death and taxes is that death doesn't change every time congress meets." - Will Rogers

  5. #5
    Day Dreaming ... happy wanderer's Avatar
    Join Date
    Mar 2010
    Location
    Vancouver, B.C. Canada
    Posts
    1,984
    Quote Originally Posted by 20774 View Post
    Brian -

    I'm not sure about the lower bolts, but as for the upper bolts, I remember it well removing the regular sized lead-acid battery. I find I have to remove one of the upper bolts and maybe help spread the frame a skosh. Also, it helps a lot to loosen the undertray bolts that hold the rubber mounts in place as well as the two bolts on the upper sides. This allows for the whole tray to be tilted back and makes sliding the battery out much easier. Yes, getting one of the newer fangled batteries eliminates all this, but I have some comfort in using the stock sized lead-acid battery.
    Sounds like the same deal on my '82 RS. I've had the Panasonic battery in there for five years now. I used foam spacers so the width is OK in the battery box. Nice grab hole design in the top makes it easy to pull out. The stock OEM BMW battery (still dry and waiting for the Panasonic to croak) requires the removal of the two top rear frame bolts, loosening of the battery box mount bolts so it tilts back all the way to the fender and even then it's a tight squeeze to get in there. It does fit the battery box perfectly.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  6. #6
    #4869 DennisDarrow's Avatar
    Join Date
    Jan 2006
    Location
    Sugar Valley, Ga
    Posts
    1,107
    It's pretty much equal to a couple, three, or four leeetle bits.....God bless......Dennis

  7. #7
    Administrator 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    13,248
    Quote Originally Posted by jimmylee View Post
    Hmmmm>

    How big is a "skosh"?
    That's a technical term! It might mean something different to different people. I try a small skosh, and if that's not enough, I usually go for the bigger variety!

    Merriam-Webster definition of a skosh.
    Kurt -- Forum Administrator ---> 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!

  8. #8
    Registered User
    Join Date
    Jun 2007
    Location
    Edmonton AB Canada
    Posts
    60

    Battery removal

    I have had good luck sliding the battery forward into the void created by removing the air filter clamshell on my older airheads.I seem to find that there is always one battery box rubber standoff that proves recalcitrant!
    Russ
    '76 R90/6 '78 R80/7 '78 R100RS

  9. #9
    Day Dreaming ... happy wanderer's Avatar
    Join Date
    Mar 2010
    Location
    Vancouver, B.C. Canada
    Posts
    1,984
    Quote Originally Posted by beemerus View Post
    I have had good luck sliding the battery forward into the void created by removing the air filter clamshell on my older airheads.I seem to find that there is always one battery box rubber standoff that proves recalcitrant!
    Russ
    '76 R90/6 '78 R80/7 '78 R100RS
    I'll have to give that a try when the Panasonic dies. It's been in there five years and it won't be long now judging from the slower cranking after sitting a few days.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  10. #10
    Registered User
    Join Date
    Apr 2011
    Posts
    32
    I always assumed those extra holes were for a sidecar.

  11. #11
    Registered User
    Join Date
    Aug 2008
    Location
    Cape Cod Ma.
    Posts
    288
    Update on frame bolts. I had an 86 r80 a few years back, and the upper bolts on the sub frame were counter sunk, I got the newer style bolts and the one ream that I own was had the right size point to set them flush, so maybe I will get the battery in and out.
    Brian

    86 k100rt, 78 r80/7

  12. #12
    Administrator 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    13,248
    Quote Originally Posted by 44817 View Post
    I always assumed those extra holes were for a sidecar.
    As lchris will point out, BMWs after 1969 are not designed to handle a sidecar and the loads plus the front suspension is wrong...that's what the Earles fork was all about. People do it, but it's not really recommended.
    Kurt -- Forum Administrator ---> 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!

Posting Permissions

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