What did you do to your ZX12R ninja today? - Page 115 - Kawasaki Forum :: KawasakiWorld.com
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post #1711 of 1721 Old 07-16-2019, 03:20 PM
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Head race

Done the head race bearings from balls to the newer roller bearings & bar risers. New fork oil. Fork seal.
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I have a A1 . 2000 model ZX12R with an extra wheel.
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post #1712 of 1721 Old 07-16-2019, 10:40 PM
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The zx9r C had roller bearings, and then Kawasaki moved to ball bearings, I donít think it will matter what you put in as they will wear, but they will last longer if you spin and regressed them every 20k or so.
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For Tech Questions Bike Model letters and Country are more useful than saying the year, for UK owners anyway, as registration year is not always the year of manufacturer model.
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post #1713 of 1721 Old 07-17-2019, 02:04 AM
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Quote:
Originally Posted by Dave Smith View Post
Done the head race bearings from balls to the newer roller bearings & bar risers. New fork oil. Fork seal.
I've tried the roller style bearings before and ended up going back to OEM ball bearings. On my bike I just could not keep the head stem from eventually loosening enough to cause that slight "clunk" when just about stopped from a hard braking. Once I returned to OEM the problem went! I had used AllBalls Racing Bearings.

Hope your experience is better than mine!

Don.
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post #1714 of 1721 Old 07-18-2019, 04:05 AM
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I've tried the roller style bearings before and ended up going back to OEM ball bearings. On my bike I just could not keep the head stem from eventually loosening enough to cause that slight "clunk" when just about stopped from a hard braking. Once I returned to OEM the problem went! I had used AllBalls Racing Bearings.

Hope your experience is better than mine!

Don.
Hi DuckOO , yeah I was going to put ball bearings back in but Kawasaki UK wants something like £43 each compared with £24 for the roller bearings.
Hope they are OK? I've noticed a slight ware on the forks since! So have slacked them off & retightened them up. Hope that sorts it?

I have a A1 . 2000 model ZX12R with an extra wheel.
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post #1715 of 1721 Old 07-18-2019, 04:18 AM
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Hope it goes well for you mate!
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post #1716 of 1721 Old 07-18-2019, 11:35 PM
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New headers on my 12 while waiting for a new clutch.

[IMG][/IMG]

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post #1717 of 1721 Old 07-19-2019, 01:53 AM
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What did you do to your ZX12R ninja today?

Supposedly rollerbearings last longer because weight is distributed over a larger area against ball bearings that are prone to wearing out sooner because weight is only spread across 2 tiny surfaces of each ball. And if thereís a slight wear on the ball it will lock in that spot and wear out even more.

Are you sure you tightened the nut correctly or didnít forget a part? Of all the bikes I serviced the last 6 years roller bearings were an improvement in steering.
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post #1718 of 1721 Old 07-19-2019, 06:20 AM
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Just remember to spin and regrease them every now and then and they will last longer.
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For Tech Questions Bike Model letters and Country are more useful than saying the year, for UK owners anyway, as registration year is not always the year of manufacturer model.
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post #1719 of 1721 Old 07-19-2019, 06:26 AM
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Where would one obtain these roller bearings at?
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post #1720 of 1721 Old 07-20-2019, 12:16 PM
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I finished swapping my engine today and after adding the necessary fluids I turned the ignition on and as I pressed the start button it fired up within seconds. I'm rather pleased! Eager to take it out for a ride and see how she performs then.
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post #1721 of 1721 Old 07-24-2019, 11:50 PM
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I've rode over 100 miles now and so far so good! It's only sweating a bit around the camshaftsensor but that's probably a worn o-ring. Somehow it shifts much nicer than my old engine. Together with the new K&N filters it pulls smoother too.
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