Question about 2003 Yamaha YZF-R1

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What causes pipes to turn red and rpms to go above 3000 after about a minute of idle

Motor starts up up fine then rpms go up and two center header pipes turn red.....any thoughts would be greatly appreciated

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  • Yamaha Master
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Weak mixture ! all 4 red ? carb version , or injection ? clean fuel system ? was it running ok b4 ?

Posted on May 12, 2014

Testimonial: "just center two pipes glowing red and its fuel injected....was running fine b4 but has sat up for a while"

  • 3 more comments 
  • paul
    paul May 12, 2014

    swop the injecters over and see if problem moves ! injecters do varnish over , soak in injecter cleaner mite solve or injecters need replacing ! G , L ...

  • david jones May 12, 2014

    thanx for the help i will give it a try and let you know

  • david jones May 19, 2014

    it was the injectors thanx for the help

  • paul
    paul May 19, 2014

    thanks for the reply and have fun !

  • paul
    paul May 19, 2014

    thanks for replyin ! and have fun ! Paul

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