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Slabby fork length


Blue

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Posted (edited)

Thanks Mole28, I’m just trying to work out how much shorter my gsxr1000 k5 forks are, I’ll have to get my tape measure out ;)

Edited by Blue
Posted

just measured the spare 750 slabby forks I've got and it was 745mm axle centre to fork cap . Think these are G/H forks if theres a difference with F ones (bar the smaller axle diameter?)

Posted
21 minutes ago, Blue said:

I take it they are off the bike :S

yup uncompressed. Bizarrely I measured the other fork from the pair later and it was 10mm shorter? wtf, they were definitely used as a pair for some time, same scabby paint. I've not pulled them apart since I've had them so no idea why one is shorter .

Posted
9 hours ago, Blue said:

Lol, I can’t seem to get a measurement from anyone with the forks fitted :S

Measuring with the weight of the bike on the fork is unreliable because it's dependent on bike weight, springs fitted, how much fuel is in the tank etc... It's better to measure fully extended length and subtract the desired sag based on unit stroke, then set spring rate & preload to achieve that sag.

e.g. let's say a slabby fork is 745mm with 120mm stroke, you might want about 40mm sag with the rider seated so your target length would be 705mm

What are you using these numbers for?

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