Alternate Discussion Board for Vision Riders. XZ550RJ XZ550RK Yamaha Vision

    Chirping from rear cylinder YICS port


    Posts : 2
    Join date : 2011-11-16
    Location : Southern California

    Chirping from rear cylinder YICS port Empty Chirping from rear cylinder YICS port

    Post  chrismalm on Sun Feb 17, 2013 1:49 pm

    After resuscitating my '82 XZ550, I capped off the YICS ports because I couldn't find a good YICS chamber. I ran it over a year with no problems. I put Stabil in the tank and stored it for two months. Then I checked the air, oil and coolant and took it out for some exercise. It ran fine for 1/2 hour, then developed a chirping or tweeting sound at low rpm's. At first I thought my water pump was at fault so I limped it home. After going over the idling engine with a homemade stethoscope (vacuum tube in my ear) I found the chirping coming from the rear cylinder YICS port. Uncapped, the sound disappeared. Capped, the sound returned. The bike seems a little harder to start and doesn't seem to idle as well as before. Anybody have an idea what is wrong with my motor ?
    Site Admin
    Site Admin

    Posts : 68
    Join date : 2009-06-18
    Age : 53
    Location : Near The Dragon

    Chirping from rear cylinder YICS port Empty Re: Chirping from rear cylinder YICS port

    Post  Site Admin on Sun Jul 28, 2013 9:18 pm

    The pressure coming out of the YICS ports can be quite high. It may be possible that your cap either had a leak or wasnt fully sealed.

    David aka YellowJacket

      Current date/time is Sun Sep 15, 2019 9:53 am