1986 r80g/s

Discussion in 'Airheads' started by frichtie, Nov 8, 2011.

  1. frichtie

    frichtie Been here awhile

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    Many thanks for the input people. I'll be writing a list of things to look at.
    A solo seat sells for about $400.00 on ebay. (That Corbin seat doesn't look too good...)
    I don't see a kick-starter either. Normal?

    I'm gonna keep you informed with further development.

    Eric
    #21
  2. One Less Harley

    One Less Harley OH.THAT'S GONNA HURT

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    Kick is on the left side, it should have one unless the tranny has been replaced. If it comes from a later GS then there may be circlip issues. I think there is a seat/rack combo available for $360.

    A different tranny isn't too much concern, but find out the year bike if came from and the miles on if if it wasn't rebuilt replacement. Still sounds like a good deal..
    #22
  3. TLTom

    TLTom Been here awhile

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    I f I had the spare $$$ I'd buy this bike on the spot.
    i bought my G/S in dec 2009 and clocked over 80.000 km so far. You'll love this bike.
    once you replace that ugly seat and rear fender with stock items she'll look nice again. I have a stock front fender you can have.
    #23
  4. H96669

    H96669 A proud pragmatist.

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    Ugly them Corbins.....if like mine hard as a rock and they limit you too much when standing on the pegs. I liked the OEM seat on the 90 GS but cut the bump back a couple inches so I could slide back and stretch. But you really need a better rear shock than the OEM when you start to play with riding position,center of gravity and preload.

    You can most probably modify a Corbin seat pan into a single seat. Now that would interest me and if I ever get to Quebec I do have full access to a Cobbler/Upholsterer shop. I am sure he already has "a few" projects lined up for me but so do my sisters, they are getting a little insistent after a year or so.:eek1:lol3

    The rack thing....nothing that a good welder/fabricator can't work around.

    I think you can work the tranny/circlip thing with the tranny serial number, that's above the shifter. If someone has that info/link here they should post it, that's a $500.00+ mod if I judge by the invoice I have here from the PO of my 87.But I got to say that my 90 had waaay more milleage than this one and the tranny never failed and I sure gave it plenty of work.:rickyBut I never ran it very long with a defective driveshaft like the PO of this 87 bike did.:eek1

    Loading up my tools and head up that way, not a problem. Convincing the US customs I am not heading to the US to work re: Tools.....I'll bring my cast & crutches, that should do it.:D

    I think you should "meet the wife":wink: and see how serious that guy is about selling it. Did I bring some on them tricks from Quebec.....I think so, I was pretty well raised in a GM dealership out there, I know the tricks, they haven't changed much.:lol3
    #24
  5. frichtie

    frichtie Been here awhile

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    The Corbin would be kept at hand just in case some day my ladie becomes a passenger...
    For the rack...of course the original part is attractive, but...I'm a machinist. So chances are that bike will receive the same "costumizing-treatment" as my Transalp. (Always keeping in mind not to alter its original roots).

    That tranny circlip thing worries me a little. I'll make sure I know more about that tranny. What bike it comes from, mileage etc...

    Eric
    #25
  6. H96669

    H96669 A proud pragmatist.

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    Ah Ah! Then you can save money, the "machining the groove" part was $75.00. The rest is just bearings, shimming,special tools....no worries, most of that is here somewhere.

    To assuage your worries...if the clutch isn't adjusted properly at the tranny it will shift pretty darn bad. 201-203 mm of exposed cable at the tranny and then 1.5-2.5 mm free play at the lever. Bring calipers....!

    That's a BMW....preload the shifter.:thumb
    #26
  7. One Less Harley

    One Less Harley OH.THAT'S GONNA HURT

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    If it's a R80 tranny then circlip isn't an issue, if it's from a latter model where it might be a problem. Might being the operative word. No point worrying if it has it or not though as you'll never now unless the tranny fails, which might not be related to the circlip. Don't loose sleep over it.
    #27
  8. frichtie

    frichtie Been here awhile

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    It takes more then that to keep me from sleeping....I rebuilt a 1942 Willys MB, a 1967 Willys M38A1, previously owned 2 Armstrong MT500 military motorcycles, currently own a Transalp I partly rebuilt, have two kids (9 and 13 years old boys) divorced 3 years ago...and still I can sleep with no pills! So one circlip...that isn't mine yet.....

    I went to the bank. Got the certified cheque. (not the exact amount just in case...) Trailer is ready.

    Since it's a long drive, I prefer taking the trailer and be ready to bring the old lady back....However, I have non idea how things will go tomorrow. Maybe I'll simply come back with an empty trailer....

    Eric
    #28
  9. Toaster.Tan

    Toaster.Tan Toaster Rider

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    You've got more valuable stuff with that bike than you can shake a wallet at. The R80 had one of the best engines ever made for weight, reliability and power. I'll hook you up with a Canuck in Vancouver (kevin) that has one he rode - and continues to ride - all over the world. I'm not sure if that bike came with 40mm carbs, but if so - more gold attached to it.

    One thing.... pull off the thin steel top plate and replace it! The forks actually twist in sand. Sorry if this is a product plug.... but go to the link below to see one that vastly improves the handling. :evil
    #29
  10. Airhead Wrangler

    Airhead Wrangler Long timer

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    I'll agree with only one of those statements. I would add though that it's probably the smoothest twin BMW has ever made... present day models included.

    I'd sell the 40mm bings for 32s. The 800 doesn't pull enough volume to make good velocity through the 40s. They'll just kill the bottom and mid range in a 800 - exactly what you don't want on a G/S. That's an easy fix though. I'd still buy the hell out of it.
    #30
  11. Toaster.Tan

    Toaster.Tan Toaster Rider

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    I have bought several bikes by having an Airhead Club member in the area look at it. I also have looked for others - in one case bought the bike myself and told him if he didn't want it - I would keep it.

    Oh contrare.... there are many Airheads in the Quebec area and if you join the internet club will have a wealth of support for your wrenching. Even folks from that wasteland below you will want to wander up...eh....or...we. The amazing thing about the airheads is they still make parts for them and there is a worldwide network of aftermarket stuff. :norton
    #31
  12. Toaster.Tan

    Toaster.Tan Toaster Rider

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    Agreed - I meant 'BMW' engine. It IS the smoothest.
    Also agree, didn't make it clear they suck out the mid-range power on an 80. 40mm are gold to folks with R100's that are doing performance changes. They have the room to make more muscle. I had a 77 R100S in Seattle that had hi-comp heads, 40mm carbs and exhaust, lightened fly wheel and other farkles that gave it pretty good push for an old, heavy bike.
    #32
  13. frichtie

    frichtie Been here awhile

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    I'm back!

    Bought the bike. The phone rang while we were sitting at the kitchen table. The seller answered: "Sorry, I just sold it".

    The transmission is original. He took the crank off because he didn't want it to hit his leg while riding. I have it.
    Rear fender will be replaced. Fork will need attention. It was reinforced but to me it looks like a "field-fix". I can easily make a better looking part. Maybe with stainless steel.
    Compression: 118-120 cold. What do you think?
    Back later.

    Eric
    #33
  14. Solo Lobo

    Solo Lobo airhead or nothing

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    Just ride it, and congrats!
    #34
  15. Airhead Wrangler

    Airhead Wrangler Long timer

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    The spec in the factory shop manual is:

    Good: >128 psi
    Normal: 107-128 psi
    Poor: <107

    I'd say you won.

    Either Solos got some serious carbon buildup, a shaved head, hi-comp pistons or a combo of all three because 150 is off the charts. At least it's definitely holding compression though.
    #35
  16. Solo Lobo

    Solo Lobo airhead or nothing

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    That, or my twice used in 18 years comp tester is f-ed up.....:lol3

    [​IMG]
    #36
  17. Airhead Wrangler

    Airhead Wrangler Long timer

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    Damn, it's reading 160. You'd need a CR of well over 10:1 to get that. Something doesn't add up there.
    #37
  18. Solo Lobo

    Solo Lobo airhead or nothing

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    Looks like I need to check the calibration on that gauge.... just to be sure
    #38
  19. Toaster.Tan

    Toaster.Tan Toaster Rider

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    It may be noth'n, but I disconnect the coils and pull both plugs to check compression. It lets the starter crank a bit better and - real or imagined - get a better reading. Disconnect the fittings on the gauge and hose the inside with carb cleaner to degrease the little valves and tube. Try it out again. My 2ยข
    #39
  20. Toaster.Tan

    Toaster.Tan Toaster Rider

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    Oh yeah..... CONGRATULATIONS on the purchase. You will love that bike. :clap
    #40