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So what's the inexpensive brake rotor solution for these bikes?

Discussion in 'Kawasaki 250cc In-line 4's' started by DamnitLaverty, May 9, 2017.

  1. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

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    My Bike:
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    Have a nasty shake under braking up front. Finding places to machine rotors out here, much less bike ones is a non-starter. What's my cheap option for a pair of zxr250 rotors? I keep seeing like 300 a rotor on eBay, etc. I don't see a part number crossover on megazip. Is there a secret trick part I can run?
     
    DamnitLaverty, May 9, 2017
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  2. kiffsta

    kiffsta Senior Member

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    Oem ones ( if still available) will cost you big time, we use a company here in Australia called metalgear which are pretty good quality . I think zxr disks are are $175 a side , so in usd that would be about $240 , ask if they ship internationally. Metalgear.com.au

    Don't buy the Chinese ones !!!
     
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    kiffsta, May 9, 2017
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  3. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

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    I'm trying not to spend 500 dollars on rotors though!

    Ugh. Pay to play, I guess. I already have to buy Duc rotors after the collision- now I gotta buy two more? Laaaame!
     
    DamnitLaverty, May 9, 2017
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  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Swap them around and see if it changes
     
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    GreyImport, May 9, 2017
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  5. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

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    It's pretty severe shaking. I think at most all I'd do is change the rhythm. Right now my mirrors flap like a bird when I brake. Can't see nothin' in them as the thing shakes my fillings out. :)
     
    DamnitLaverty, May 9, 2017
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  6. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

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    This is likely the result of stiction due to the caliper being a 2 pot clamp style caliper.
    IF everything is aligned correctly then you might want to consider rebuilding and lubing your master cylinder & calipers along with installing braided lines and replacing and bleeding new brake fluid.
     
    Damus, May 9, 2017
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  7. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

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    Rebuilt both calipers 400km ago along with fluid flush and lube. Braided lines would be a nice-to-have, but I'm not there yet.

    It only shudders under braking, not when going down the road, so I don't think the calipers are sticking on the sliders post-rebuild.
     
    DamnitLaverty, May 10, 2017
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  8. 2valve

    2valve Well-Known Member

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    Hi, if possible borrow a dial gauge or make make a home made one and see what rotor(s) is at fault , and get it trued if possible. Have seen them trued before a very long time ago while still fitted to a bike , was very interesting and very well done. I use to youse a permanent marker (or you can use baby powder , but a bit messy for me) and draw lines on the disc's and you could see where the brake pads where rubbing / making contact and where it's not , this is an old method of setting floating brake calipers on old BMW bikes.Sounds crazy right , but it works.
     
    2valve, May 10, 2017
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  9. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Are you sure the headstem bearings are tight and not slopping about when you brake?
     
    Murdo, May 10, 2017
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  10. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

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    Ya know what? No! No I'm not! That'd make way more sense than the rotors being toast at this low mileage! Good lookin' out- I'll check that tonight!
     
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    DamnitLaverty, May 10, 2017
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  11. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    How to check head stem bearings on your own:

    Motorcycle on side stand, bars full lock right. Right arm holding down rear end, left on right bar. Foot behind side stand. Rock bike on the side stand while pushing rear down. Once balanced, check for a notch in the bearings by moving the bars from side to side slowly.

    Need a 2nd person to grab front wheel and check for slop in the wheel bearings and grab the forks to check for loose head stem bearings.
     
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    Linkin, May 10, 2017
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