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Carb Tuning – deciphering the voodoo and black magic within

Home Forums Bikes DIY / custom builds Carb Tuning – deciphering the voodoo and black magic within

Viewing 8 posts - 16 through 23 (of 23 total)
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  • #12361
    Eddieb
    Keymaster
    • Town/City: Tauranga
    • Bike: BMW R100GS, Ducati Mark 3 250 narrow case
    Rank: Round the World Adventure Globetrotter

    @Badjelly said:
    If there was a group carb-tune session on that dyno I’d be interested.

    Thanks

    Yeah I’m quite keen to get the Dr on the dyno too for a baseline before I put a high compression piston in.

    #14929
    Eddieb
    Keymaster
    • Town/City: Tauranga
    • Bike: BMW R100GS, Ducati Mark 3 250 narrow case
    Rank: Round the World Adventure Globetrotter

    So, my bike stopped idleing recently and at the same time the midrange improved HUGELY, it now comes on in a big rush.

    On investigation I discovered the extended fuel mixture screw has unwound itself and dropped out of the carb.

    I want to get the bike idling again but not lose that huge midrange rush. With the fuel screw removed that means more fuel is getting in through the idle system, so I should go up a size on the idle jet?

    #17206
    Eddieb
    Keymaster
    • Town/City: Tauranga
    • Bike: BMW R100GS, Ducati Mark 3 250 narrow case
    Rank: Round the World Adventure Globetrotter

    @badjelly dyno day in 2 weeks, $40 per run.

    https://www.adventureridingnz.co.nz/forums/topic/auckland-dyno-day-saturday-march-25th-2017/

    @Badjelly said:
    If there was a group carb-tune session on that dyno I’d be interested.

    Thanks

    #18598
    Eddieb
    Keymaster
    • Town/City: Tauranga
    • Bike: BMW R100GS, Ducati Mark 3 250 narrow case
    Rank: Round the World Adventure Globetrotter

    I found this nifty video on how a CV carb works. This type of carb is stock on the DR650, KLR650 and many other bikes.

    #18599
    Box.a.Bits
    Participant
    • Town/City: Wellington
    • Bike: BMW R80 G/S, R100GS & M72 Sidecar, Gilera Runner ST200
    Rank: 1200cc Rider

    Dyno day seems to want to cover 1/2 of your video….

    #18600
    Eddieb
    Keymaster
    • Town/City: Tauranga
    • Bike: BMW R100GS, Ducati Mark 3 250 narrow case
    Rank: Round the World Adventure Globetrotter

    @stephen.clark said:
    Dyno day seems to want to cover 1/2 of your video….

    ??? post a screenshot? it looks ok to me on my pc and my android phone.

    #36676
    Eddieb
    Keymaster
    • Town/City: Tauranga
    • Bike: BMW R100GS, Ducati Mark 3 250 narrow case
    Rank: Round the World Adventure Globetrotter

    #36685
    Muzz67
    Participant
    • Town/City: Richmond
    Rank: 1000cc Rider

    Excellent vids Eddie, thanks for posting.

Viewing 8 posts - 16 through 23 (of 23 total)
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