Results 1 to 6 of 6

Thread: 1983 R100 w/sputnic

  1. #1
    Arctic Art
    Join Date
    Oct 2010
    Location
    Manley Hot Springs Alaska
    Posts
    140

    1983 R100 w/sputnic

    The deal is that it has little torque in 4th,lots of snort in 3rd,but 4th feels like mashed potatoes,as for 5th it's out of the question. There was a 33:11 final and I've switched to a 37:11 which gives me 11% more torque.This is a low mileage bike (18K) and dual plugged also put in a one notch higher main jet,a 50 idle jet and a notch down on the needle jet as I believed I was running rich in that range.All these mods have yet to be road tested being as I'm in Alaska and it's cold now.Question is: Anyone have similar experience with this engine with a sidecar.Like what to expect in in 4th and 5th speed torque wise.Thanks

  2. #2
    Registered User
    Join Date
    Apr 2005
    Location
    Kansas
    Posts
    231

    USCA forum

    You need to ask that question on the USCA forum WWW.sidecar.com There is a guy on that forum with almost the same rig and he is active enought to see your question.
    Harold In Kansas
    1985 K100RT Bullit
    1985 K100XX/EML Bemel

  3. #3
    Club President HankPfister's Avatar
    Join Date
    Mar 2003
    Location
    Blue Ridge Mountains, Virginia
    Posts
    324

    final drive swap

    Hi, I see that this is an older thread, but here is my experience. I have a R75/5 with a Dnepr sidecar. With the stock final drive I almost never got to use 4th gear, except on long down grades. I swapped to a final drive from a R60 and it did a little better, but then I found a R50 final drive and 4th gear is very usable, and a good match. I also have a Perry Bushong Sidecars triple tree that makes steering a whole lot easier.

    P5120939-S.jpg
    Hank Pfister
    Copper Hill, VA
    pfestus1@yahoo.com
    2007 R1200GS, 1973 R75/5/Dnepr, 1984 R100RS/Motovation.
    www.twinvalleyriders.com

  4. #4
    Registered User richardak's Avatar
    Join Date
    Dec 2007
    Location
    Fairbanks, AK
    Posts
    296
    My sidecar is a little under 200 lbs so your experience may differ. I can easily cruise up and down hills all day in fourth. On flat ground I can use 5th at 60 and if I go a little faster, fifth works going uphill as well. But it likes 4K rpm.

    Since the OP is in Alaska, I'll give some examples. Once leaving Fairbanks towards Delta, 5th just about all the way no problem unless there is a lot of other traffic. When heading to Anchorage, 4th through the hills to Nenana then mostly 5th unless slowing for curves or traffic. If I'm at 65, I can still accelerate in 5th but it likes 4th better but that was true even without the sidecar.

    George Rahn mentioned that he has another final drive laying around with lower gearing.

    Hope this helps.
    1983 R100RT hacked w/Cozy Rocket My blog
    2012 Ural Patrol
    Airhead #10576

  5. #5
    Survivor akbeemer's Avatar
    Join Date
    Jul 2007
    Location
    Land of the Big Sky
    Posts
    3,844
    Quote Originally Posted by richardak View Post
    My sidecar is a little under 200 lbs so your experience may differ. I can easily cruise up and down hills all day in fourth. On flat ground I can use 5th at 60 and if I go a little faster, fifth works going uphill as well. But it likes 4K rpm.

    Since the OP is in Alaska, I'll give some examples. Once leaving Fairbanks towards Delta, 5th just about all the way no problem unless there is a lot of other traffic. When heading to Anchorage, 4th through the hills to Nenana then mostly 5th unless slowing for curves or traffic. If I'm at 65, I can still accelerate in 5th but it likes 4th better but that was true even without the sidecar.

    George Rahn mentioned that he has another final drive laying around with lower gearing.

    Hope this helps.
    Rich, Ride out there and show him your rig. His name is Arthur; nice guy.
    Kevin Huddy
    Intrepid Incompetent
    Tm Pterodactyl MT Outpost

  6. #6
    Registered User richardak's Avatar
    Join Date
    Dec 2007
    Location
    Fairbanks, AK
    Posts
    296
    Quote Originally Posted by akbeemer View Post
    Rich, Ride out there and show him your rig. His name is Arthur; nice guy.
    Sounds like a possibility. Maybe after Salem...
    1983 R100RT hacked w/Cozy Rocket My blog
    2012 Ural Patrol
    Airhead #10576

Posting Permissions

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