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Thread: R850R MPG fix?

  1. #1
    Loading the Bike
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    Oct 2007
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    Martinez, Ga
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    R850R MPG fix?

    Mine is a 96 and less than 9K (sat up for years) and I was wondering what I can do to improve mileage. I try to stay below 60 on back roads and under 75 on the slab. It seems to be around 38 or so and 32 hwy. I am guessing clogged exhaust or just not designed for high speed riding.

  2. #2
    Registered User
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    Jul 2006
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    Fairfax, VA
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    At 9000 miles it may not been broken in. Still I think a tune up is the first step. Replace the spark plugs and air cleaner, adjust the valves. balance the throttle bodies; add some fuel injector cleaner to a tank of gas . Then see if the fuel consumption improves. Also a naked motorcycle and rider has miserable aerodynamics. For what it is worth I installed a Hannigan faring on my 95 R1100R and consistently return 48mpg on Virginia's back roads.
    regards,
    Mark

  3. #3
    Registered User
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    Quote Originally Posted by heybiker View Post
    Mine is a 96 and less than 9K (sat up for years) and I was wondering what I can do to improve mileage. I try to stay below 60 on back roads and under 75 on the slab. It seems to be around 38 or so and 32 hwy. I am guessing clogged exhaust or just not designed for high speed riding.
    i am guessing NO on both counts.
    BMWs are geared for high speed cruising, and should get in the mid to upper 40's. frequent starts & stops kills my mileage, steady cruising speeds returns the best mpg. (that, and running at high altitude).
    exhaust rarely, if ever, get "clogged", although catalytic converters can fail- but incredibly unlikely at only 9K miles.

    check condition of rubber seals (bike running, spray carb or FI cleaner at any possible opening on the TBs), valve adjustment, etc.
    Ride Safe, Ride Lots

  4. #4
    MOA #24991 Pauls1150's Avatar
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    Apr 2008
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    I'm not specifically familiar with the 850, but - do you have a TPS? Every bike I've done a careful "Zero=Zero" procedure on instantly got better mileage. Find the how-to on the Internet BMW Riders page, IBMWR.org.

    If anything was clogged, I'd guess the air filter. Tight valves will also hurt the mileage; the factory spec is typically too tight.

  5. #5
    Registered User
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    Dec 2008
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    Bremerton WA
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    My 97 850R got about 38 to 42 mpg. Mine had 65k on it. You get my vote for the bike needing more break in time also. I had a 2006 Triumph Tiger I bought new. I only got 38 to 42 with it til I had about 14k on it.Then the mpg went to about 48 to 53.

    Just ride the 850 and enjoy it...I wish I still had mine,it was my first boxer

    Perry
    Perry Brokaw
    97 R 850 R :sold
    98 R1100RTL:
    98 R1100GS:

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