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    1 of 6
    Yermo
    8 months ago
    I'm getting geared up to attempt the big engine swap in my '92 K100RS, a.k.a. my Beloved Blue Oil Burner. 

    The throttle bodies on the donor engine are woefully out of sync. What do you guys recommend for syncing the throttle bodies? 

    One suggestion was:

    Link #67714
    Yermo
    8 months ago

    Morgan Carbtune - carburetor synchronizer for balancing motorcyclecarbs

    Carbtune motorcycle carburetor synchronizers;polycarbonate tool pouchs;for motorcyclists

    https://www.carbtune.com/
    Another was:

    Link #10260
    Yermo
    5 years ago

    Multi-Carb Vacuum Tester KEK-55-64 This electronic carb synchronizer balances multi-carburetor engines The LCD readout in Kowa Tools 4 B000Q6P3B4 car product information | Cheap Auto Parts

    Multi-Carb Vacuum Tester KEK-55-64 This electronic carb synchronizer balances multi-carburetor engines The LCD readout in Kowa Tools 4 B000Q6P3B4 car product information

    http://www.cheapautoparts.com/m/526...
    2 of 6
    JoeMama
    8 months ago
    Yermo,

    Have Carbtune, will travel.  Bob's sells an electronic balancer made by Twinmax - made by a UK company - for @ $120.  Boxed set of tuner and goodies runs @ 90 pounds British direct from the company.  I'm guessing with currency exchange and shipping you're right about at Bob's price anyway.

    Carbtune has worked fine for me with Japanese twins and in-line fours.  Those have all been carbs vice throttle bodies though.  Found a post about synching pre-2005 K bikes TB positioner to the bike's CPU - see post 10 in the link below.  I'm guessing your talking more about basic fuel air mix and vacuum as a pre-req to synching up the CPU.

    That's the beauty of owning fully analog bikes...the CPU is between my ears and it's never been synched to anything so no worries!

    Kevin
    Link #67745
    JoeMama
    8 months ago

    Twinmax Carburettor Balancer Boxed Set

    Twinmax Carburettor Balancer Boxed Set from Mister Gear: premium quality motorcyle touring equipment sold online for over 15 years.

    http://www.twinmax.co.uk/acatalog/t...
    Link #67746
    JoeMama
    8 months ago
    3 of 6
    Yermo
    8 months ago
    awesome. Thanks for the links!

    I have a twin max but have never had any luck with it. It bounces around too much to get a solid reading.
    4 of 6
    JoeMama
    8 months ago
    Sounds like the indicator needle is supposed to search a little...another link with some decent pics from TwinMax
    Link #67767
    JoeMama
    8 months ago

    BMW R1200 Throttle Body Sync with TwinMax | TwinMax

    The following is a quick tutorial on how to complete a Throttle Body Sync on a R1200 series motorcycle, up to the Wethead in 2013.

    https://www.twinmax.eu/blogs/synchr...
    5 of 6
    Yermo
    8 months ago
    oh cool. Thanks.
    6 of 6
    Robermcm
    8 months ago
    A lot of folks make their own manometers, using some heavy liquid, like atf. I bought one from JC Whitney in 2004 and, along with the four tubes and hoses, they sent a vial of mercury!!  Wow. Works well though. Heavy liquid doesn’t bounce as much or as fast. 

    That said, I’ve seen a lot of good press on the options that kevin shared. 
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