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Thread: Replacement Exhaust R100RT Question

  1. #1
    Registered User rapz's Avatar
    Join Date
    Nov 2003
    Mission, TX

    Replacement Exhaust R100RT Question

    I have a 1979 R100RT and I have removed the exhaust, originally just to clean it up, but I noticed quite a bit of rust on the mufflers and the exhaust headers have had the rear cross pipe ports welded shut. I think this was done to accomodate installation of the Reynolds Ride-Off Center Stand, but not sure. I'm wondering how this affects performance? I noticed the mufflers also weigh a lot. Any replacement recommendations? I posted lots of pictures on my blog. Thanks!
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    IBA No. 58411
    Current Bike 2017 BMW R1200RT; 2008 Harley Davidson Ultra Classic 105th Anniversary Edition; Scooter

  2. #2
    Macrunch MCrenshaw's Avatar
    Join Date
    Mar 2008
    Bedford, TX
    J.C. Whitney has the Emgo exhausts for BMW airheads. Look is identical to OEM, easy installation and quiet. If you are looking to replace the headers I would try the internet auctions.

  3. #3
    MOA #24991 Pauls1150's Avatar
    Join Date
    Apr 2008
    south of Los Angeles
    Not an issue, but just for information's sake:
    Some years of R100s had a "resonator" chamber ahead of the mufflers; it kinda looked like what became the catalytic converter on later models but was just another muffler. Going through it front-to-back on both sides with a half-inch drill, and setting the needles one step richer, sure made 'em run a lot better with very little increase in noise.
    A few of the automotive performance parts manufacturers have plots that show a second cross-over in the right place does provide a small performance increase.

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