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Rhythmic Vibration


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Not yet- Just got the new headers on this weekend. I'm gonna try that next. Thanks for the advice.

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Great post on the rear spindle and a lesson I learned the hard way racing my NC30.
 
I’d contend on the deceleration shimmy but we’ll see how she feels after I replace my bearings (on my ZRX)...Which relatedly or not are visibly due.
 
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I plan to reassemble with new and no other changes and will see if the headshake improves. Could definitely be a worn tire, but an interesting test for posterity... I can then test again with new front tire fitted.
 
It’ll be a while tho.... 2 kiddos at home and one’s still fairly new!
 
 
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Update after replacing the steering head bearings in my ZRX. Head-shake at speed after letting go of bars is gone. Same tire, same balance. I did replace worn brake pads and cleaned the rotor surfaces for bedding in. Front end feels super tight and planted now. Spent a decent bit of time cleaning and lubing the speedo drive assembly, also lubed the drive cable well and greased where the cable slots in. Couldn’t be happier to get in another ride on Godzilla. Hot damn these bikes always impress.

Old lower bearing:

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Visible wear on upper bearing race:

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Oooo shiney:


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Lower bearing pressed back on:

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Noticed my pads were near spent. Found a new set of Brembo pads upstairs...

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Gone for a shake down and bedded in the front brake pads. Now time for an oil and filter change.

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Done!

0f3567e6719fe40784a3d3e626a96e50.jpg


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I've experienced the same elation with the replacement of steeringhead bearings.

It does feel like getting a new machine, sort of.

Congratulations on solving your issues.

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I broke down and ordered new roller bearings myself. I've noticed a bit of vibration at... perfectly legal highway speeds... :pinocchio: and I imagine this is the culprit. I know I've never done them and it's certainly possible they're original.

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