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Thread: 12R Sputters Under 3000 rpm

  1. #1
    Junior Member
    Join Date
    Oct 2017
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    3

    12R Sputters Under 3000 rpm

    Hi all,

    I have a 12R, it has 23,000 miles on it and Ive had a few issues over the couple years I've had it. This post is unforntunately not about my bike. It's about my brother's 12R. He has a 2004 with 4,600 original miles. Its absolutely beautiful. The only issue is at under 3000 rpm he has a nasty sputter, cough, stutter, i don't know what to call it. So i suggested he do a crank breather reroute.

    We tore into his bike this morning and somebody started it but it was missing a few things. We did it right and it still isn't running any better. It has irridium plugs, the air box has been drilled, and the exhaust has been modded.

    I don't have a way to check the ecm to check the map, but until it arrives, is there anything else to check? Anyone have a suggested map besides the race map for his set up?

    Thanks,

  2. #2
    Senior Member Cooter's Avatar
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    Dec 2012
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    Crawling up your skirt
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    10,877
    Check your other thread. One is fine.

  3. #3
    Banned
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    May 2014
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    Seattle
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    1,636
    Perform intake leakage test.

  4. #4
    Senior Member rchuff's Avatar
    Join Date
    Apr 2012
    Location
    Willow Grove, Pa
    Posts
    2,018
    You should do a TPS reset but you really need a race map because you did air box mod and exhaust.



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