RWU Fork lengths

[ruffle]

Having read in this august forum that a ZRX front end is an easy fit onto a Z1000J/GPz headstock I've been looking around and getting confused with the length of forks.

The ones I've currently got fitted are GPz1100B1 and are 38mm in diameter and 825 mm from axle centre to the top of the stanchion. I've checked with what I know are genuine original B1 forks so I know that's correct.

I saw some ZRX1100 legs on FleaBay and asked the seller to measure them. 43mm diameter as expected but only 665mm long. That's 160mm/10" shorter! That's never going to work.

Perhaps the EBay seller didn't measure them correctly (they were off the bike so not loaded)..

I also looked on the fork length table (link posted here recently) and the B1 is listed as 653 and the J at 644. The ZRX 1100 (actually says ZXR1100 97-2000) is shown as 610. I assume these are stanchion lengths which isn't a lot of help.

Am I missing something obvious here? Does anyone know the length from axle centre to top of stanchion for a ZRX1100/1200?

[harrythemagnum]

ZRX are 770mm from cap to axle.

[ruffle]

Thanks for that info. Looks like Mr EBay can't use a tape.

So 55mm shorter.... hmmmm.... that's going to change the steering geometry quite a bit. If you pulled the legs through the yokes by 55mm that would be quite drastic.

On the other hand, a J/GPz isn't the quickest steering thing ever made.

Decisions, decisions eh?

Any comments from those wot av done it? Did you use the standard ZRX yokes or use some special offset ones?

[Pigford]

I got standard ZZR1100 RWU forks on me Harris - but dunno what that'll do to the handling as I've probably fook'd it up with the JMC anyhow

[garyd]

fork length table...

I think that will list the stanchion length not the actual length of the fork.

You can make the fork longer just be messing with the stops and adding a different length spring....but not by much.

[ruffle]

I got standard ZZR1100 RWU forks on me Harris - but dunno what that'll do to the handling as I've probably fook'd it up with the JMC anyhow

Hmmm.... ZZR1100 are 43mm. What length (axle centre to stanchion top) are they?

[Pigford]

I got standard ZZR1100 RWU forks on me Harris - but dunno what that'll do to the handling as I've probably fook'd it up with the JMC anyhow

Hmmm.... ZZR1100 are 43mm. What length (axle centre to stanchion top) are they?

Dunno - its at work at the moment

[kev edwards]

That's 160mm/10"

160mm is only 6 & 5/16 inches, i measured my old chap in mm and am really happy that when converted to inches it came out at 14 & 1/2.

[zpower]

This is a list of fork dimensions and lengths but it's far from complete but maybe of use to someone...

http://www.tarozzipaolo.com/inglese/kawasaki.htm

Phil.

[KWACKERZ1]

Fairly sure zzr 11 forks are 30.5" the same as zrx ones!

[compo z1r]

That's 160mm/10"

160mm is only 6 & 5/16 inches, i measured my old chap in mm and am really happy that when converted to inches it came out at 14 & 1/2.

cannot wait for jimmocks reply to this one kev

[ruffle]

That's 160mm/10"

160mm is only 6 & 5/16 inches, i measured my old chap in mm and am really happy that when converted to inches it came out at 14 & 1/2.

Oh Arse I hate it when the keyboard pixie changes things to make me look even more stupid than I am

Anyway, in summary it looks like my best bet is to go for ZRX1100 or ZZR1100 and see how nervous the increased steering angle makes it.

[KWACKERZ1]

The zzr1100 top yoke has the advantage of being stepped so you can recover some height, but the zrx 11 top yoke is prettier!

[ruffle]

As I want to have 'normal' handlebars, a ZZR top yoke wouldn't work as it uses 'top mounted clipony type thingies'.