Author Topic: WTB: 31/11 (2.82:1, K100RS, monolever) final drive  (Read 146 times)

Offline mibh

  • Motobrick Curious
  • Posts: 20
  • BMW rider since 1984
WTB: 31/11 (2.82:1, K100RS, monolever) final drive
« on: August 22, 2019, 04:17:48 PM »
i've got unhealthy slack between acceleration and engine braking, and it's in my final drive. the K100RS had the lowest gear ratio, thus a higher wheel speed per engine RPM, and i want to keep this bike stock. so while 32/11 (2.91) final drives are pretty common, i really want a 31/11 (2.82). i'm not ready to learn how to tear one of these down and source new gears for it, so i'm hoping that someone here has one they're willing to sell. any monolever will fit, it doesn't have to be from 1985 like the rest of my K100RS. greg hutchinson (of airheadadventure.com and the undealership in redwood city california) is also calling around trying to find this for me, in case you hear the same request from that other pathway.

PM preferred.
  • Skanderborg, DK; California, US; London, UK
  • R100 '81, '84, K100RS '85 (US), K100RS '85 (DK), K100RS '84 (UK)

Offline johnny

  • TrailBrakingThrottleWhacker
  • ^ Quintessential Motobricker
  • Posts: 6758
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Re: WTB: 31/11 (2.82:1, K100RS, monolever) final drive
« Reply #1 on: August 22, 2019, 04:47:43 PM »
greetings...

whats the part number... i might have one... mines were drained flushed fogged wrapped inside trashbags and stuffed in usps flatrate boxes with the oe part numbers and milage on there...
 
j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline mibh

  • Motobrick Curious
  • Posts: 20
  • BMW rider since 1984
Re: WTB: 31/11 (2.82:1, K100RS, monolever) final drive
« Reply #2 on: August 22, 2019, 05:00:07 PM »
greetings...

whats the part number... i might have one... mines were drained flushed fogged wrapped inside trashbags and stuffed in usps flatrate boxes with the oe part numbers and milage on there...
 
j o
according to realoem.com, my serial number (0042152) is type code 0513 and the 31/11 2.82 rear final drive is PN 33111450955 for which (with core) they'd like to be paid $1400 (which is absurd for my situation), but that it has been superceded by PN 33111454953 (also $1400 but they aren't asking for a core on that one.)
  • Skanderborg, DK; California, US; London, UK
  • R100 '81, '84, K100RS '85 (US), K100RS '85 (DK), K100RS '84 (UK)

Offline johnny

  • TrailBrakingThrottleWhacker
  • ^ Quintessential Motobricker
  • Posts: 6758
  • Whacking...n...Chopping Sliding...n...High Siding
Re: WTB: 31/11 (2.82:1, K100RS, monolever) final drive
« Reply #3 on: August 22, 2019, 05:18:35 PM »
greetings...

rodger that...

i will be home saturday... will let you know either way...

j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline mibh

  • Motobrick Curious
  • Posts: 20
  • BMW rider since 1984
Re: WTB: 31/11 (2.82:1, K100RS, monolever) final drive (BOUGHT)
« Reply #4 on: August 22, 2019, 10:56:16 PM »
update: was offered a 31/11 from 1985 with purported 15K miles on it for $300. said yes. so, this WTB is over. thanks to all!
  • Skanderborg, DK; California, US; London, UK
  • R100 '81, '84, K100RS '85 (US), K100RS '85 (DK), K100RS '84 (UK)

Offline johnny

  • TrailBrakingThrottleWhacker
  • ^ Quintessential Motobricker
  • Posts: 6758
  • Whacking...n...Chopping Sliding...n...High Siding
Re: WTB: 31/11 (2.82:1, K100RS, monolever) final drive
« Reply #5 on: August 23, 2019, 07:43:24 AM »
greetings...

i had somebody at the motobrick garage last night... they checked my stock... i dont have that one...

and in the future another source for hundert parts is the k one hundert forum...

http://www.k100-forum.com

let us know how your new 31/11 works out...

yeeeeehaaaaa...

j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

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