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Thread: Neglected R100GS/PD

  1. #1
    Podzo
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    Neglected R100GS/PD

    Just purchased a 1995 R100GS/PD Classic. It only has 6,366 miles on it but has been sitting in a garage for 10 years or so. Of course the previous owner did not drain gas or do anything to it other than park it and cover it up. Working on it, I am interested in a battery. . .any comments on lithium or suitable replacement. Also, a gas tank bag and rear trunk. The back rack is chrome but has a lip on it. Not sure if there is a after market trunk for that model. I am sure you guys would know. Thanks for the help and anything I might over look besides the obvious fluids to replace on this fine model to bring it back to life.

  2. #2
    Registered User RINTY's Avatar
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    You'll get various replies on preferences for battery type, but I would get a flooded lead acid.
    Rinty

    "When you don't know where you're going, any road will get you there."

  3. #3
    2011 R1200RT ka5ysy's Avatar
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    Sounds like a good project bike. How about some photos ?
    Doug, 2011 R1200RT Polar Metallic
    MSF #127350 NAUI #36288

  4. #4
    MearthA rdalland's Avatar
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    Quote Originally Posted by RINTY View Post
    You'll get various replies on preferences for battery type, but I would get a flooded lead acid.
    My Dakar spends a lot of time on it's side...I opted for a sealed gel battery so I don't have to worry about battery acid.

    ride what you've got; enjoy the road you're on!

    Reid - Stone Ridge, NY - MOA #69187 - Turbo Fluffy Motoclub - IBA #50182

  5. #5
    Registered User beemerguru's Avatar
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    GEL MAT...but the battery is just the start, You'll need a carb rebuild, steering head bearing re-greasing or replace, throttle mechanism grease, all the fluids changed, possible master cylinder replacement, check tires for date of manufacturing - air will need to be replaced, check electrical connections for corrosion, make sure rear brake shoes aren't frozen, check air filter for mouse nest....and then you can start with a standard tune up.




    kidding about the air ;-))
    Greg Hutchinson
    R80G/S (4) 633CSi with 450K mile
    '68 R60/2 '88 K100RS Special Edition
    http://gregsgssite.shutterfly.com/

  6. #6
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    Do not neglect the wheel bearings. When I purchased a "well maintained" bike, the front bearing was totally dry! Cost me dearly!

    After weighing all the options, my top two choices were ones either from Advance Auto (guaranteeed 1 year) or Batteries Plus or AutoZone.

    the others were expensive and not worth the extra cash in my opinion.

    Also there are zillions of AutoZone's/Advance Auto stores no matter where you travel.

  7. #7
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    My battery preference generally for ALL my bikes is AGM - Absorbed Glass Mat. Westco has a full line and batteries for almost all BMWs. Discharge rate is very slow and they can be installed in any position. The advantage over Gel batteries are: AGMs are slightly less expensive and they do not need a special charger. Disadvantage over conventional wet batteries are: AGMs are slightly more expensive (which is more than compensated by longer life) and they do not tolerate a deep discharge. I have a Westco AGM in my 77 R100S, my 90 K1 and my 99 R1100RT. My K1600GT still has the factory Gel but will get an AGM as soon as it needs a new battery

  8. #8
    Registered User mysteriousfish's Avatar
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    Quote Originally Posted by beemerguru View Post
    GEL MAT...but the battery is just the start, You'll need a carb rebuild, steering head bearing re-greasing or replace, throttle mechanism grease, all the fluids changed, possible master cylinder replacement, check tires for date of manufacturing - air will need to be replaced, check electrical connections for corrosion, make sure rear brake shoes aren't frozen, check air filter for mouse nest....and then you can start with a standard tune up. kidding about the air ;-))
    ++ on the airbox...I bought an R100 that lived on a farm and there was a mouse nest in the tail cowl; mud daubers nests behind the side covers, and the air box intakes were choked with bird feathers!
    michael
    __________
    1995 R100GS; 1980 R100RT

  9. #9
    Alps Adventurer GlobalRider's Avatar
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    Quote Originally Posted by podsobinski View Post
    Working on it, I am interested in a battery. . .any comments on lithium or suitable replacement.
    I just brought my R100 GS out of hibernation. It has been parked since 2002 and it needed a battery.

    I usually go for the factory BMW Mareg batteries, but cost and a direct fit replacement had me try a YUASA 53030. I hope it lasts as long as the factory BMW batteries that I always got 9 years out of. These are plain old flooded lead acid batteries that can be maintained, which is why they last.

    Other battery types such as AGM, GEL and Lithium are too finicky. They do not do well in hot climates because the charging system generally overcharges them.

  10. #10
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    Quote Originally Posted by GlobalRider View Post
    I Other battery types such as AGM, GEL and Lithium are too finicky. They do not do well in hot climates because the charging system generally overcharges them.
    That is a general statement, which lumps ALL OTHER TYPES into one category. AGMs use the exact same chargers as wet cell batteries. After all, they ARE lead acid batteries.

  11. #11
    Alps Adventurer GlobalRider's Avatar
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    Quote Originally Posted by EMSimon View Post
    That is a general statement, which lumps ALL OTHER TYPES into one category. AGMs use the exact same chargers as wet cell batteries.
    Not quite; there are slight differences. But that isn't what matters.


    Quote Originally Posted by EMSimon View Post
    After all, they ARE lead acid batteries.
    True, but what matters is that they cannot be overcharged and in the process of doing so, they cannot be topped up when necessary.

    I can overcharge my FLA every now and then to equalize the cells. And I can top them up as desired.

    My original FLA in my car will soon be in its 15th year operating under very wide temperature extremes (-30C to +34C).

  12. #12
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by GlobalRider View Post
    True, but what matters is that they cannot be overcharged and in the process of doing so, they cannot be topped up when necessary.
    Don't understand that sentence at all.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  13. #13
    Alps Adventurer GlobalRider's Avatar
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    Quote Originally Posted by happy wanderer View Post
    Don't understand that sentence at all.
    You do know that charge voltage is temperature and battery type dependent.

    You do know if you overcharge a battery, it gases...even an AGM.

    When it gases, it loses fluid.

    You cannot readily add fluid to an AGM.

    A FLA can be topped up. I take the one out of my car, clean it and top it up every two years. The voltage regulator within the alternator is spot on as well...the likely cause that the battery has lasted this long, plus the fact that it is a Panasonic car battery (only available in new cars). The last one in the other car was 18 years old when I lost track of it.

  14. #14
    Registered User f14rio's Avatar
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    there may be rust inside the fuel tank

    ntxt
    "Enemy fighters at 2 o'clock!...Roger, What should i do until then?"

    2010 r1200r, 2009 harley crossbones, 2008 triumph/sidecar, 1970 norton commando 750

  15. #15
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by GlobalRider View Post
    You do know that charge voltage is temperature and battery type dependent.

    You do know if you overcharge a battery, it gases...even an AGM.

    When it gases, it loses fluid.

    You cannot readily add fluid to an AGM.

    A FLA can be topped up. I take the one out of my car, clean it and top it up every two years. The voltage regulator within the alternator is spot on as well...the likely cause that the battery has lasted this long, plus the fact that it is a Panasonic car battery (only available in new cars). The last one in the other car was 18 years old when I lost track of it.
    Yes, I know all those things.
    So I guess what you meant was "True, but what matters is that they CAN be overcharged and in the process of doing so, they cannot be topped up when necessary."
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

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