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Smaller Sprocket on ZZR250......thoughts?

Discussion in 'Modifications and Projects' started by Beefcake, Oct 2, 2006.

  1. I have a ZZR250 with the original sized chainring on the back.....all pretty sweet, except trying to "cruise" at 100-110-Km/h it is revving at about 8k rpm. Yes, i know this is the usual 250 setback..........but I had an idea. Why don't i just get a smaller rear sprocket to give it a bit more "top end". I know first gear can handle being taller, i hardly even need first gear normally.

    Has anyone done this? What are your thoughts?

  2. Hi Beefcake

    I have had the same thought about my GPX 250 dropping the cruise RPM.

    The best advice is to ask the manufacturer or a Kawasaki dealer on there recomendations.

    I wouldn't mind finding out what the outcome would be!
    I'll probablly ask on the weekend as i'm due for a rear tyre!

  3. If you think you won't need to slip the clutch too much then go for it.

    It will mean you need to rev a bit more through every gear up to top.

    How much hwy work do you do?

    If you do it, then go in small steps. 1 or 2 teeth.
  4. I've been wanting to do the same thing to my babystorm, at 110 it just revs too hard. How much do the rear spocket normally cost?