zx12 A2 to zx14 A7F fork swap project
This is a discussion on zx12 A2 to zx14 A7F fork swap project within the ZX-12R forums, part of the Kawasaki Motorcycles category; Very nice. I want ohlins with radial mount brakes and this is probably the easiest way to get them!...
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|04-15-2012, 10:31 AM||#31|
Very nice. I want ohlins with radial mount brakes and this is probably the easiest way to get them!
|04-15-2012, 03:05 PM||#32|
From: NY - LI
Joined: Apr 2008
When messing with the factory steering geometry, I would suggest it. That bike was never designed with those forks. It will just be cheap insurance, just in case.
|04-16-2012, 02:27 PM||#33|
Rake on zx14 is 23 deg trail is 94mm
Rake on zx12 is 23.5 deg trail is 98mm 5mm less offset with zx14 triples = 93mm trail
Im sure by doing this mod the geometry of my 12 is going to be in the same region as the zx14.
More offest = more trail
Less offset = less trail
More trail is more stable at speed in a straight line but slower turn in.
Less trail is less stable at speed but more willing to turn in.
The bmw s1000rr uses a rake of 23.9 degrees and a trail of 95.9mm for comparison.
|04-17-2012, 03:29 AM||#36|
From: NY - LI
Joined: Apr 2008
I still wouldn't chance it. I have one in the stock setup... Anytime you change the stock geometry, even slightly, it is a good idea.
|04-17-2012, 11:44 AM||#39|
DRP nearly there more progress tonight got the triples all fitted but ran into a few clearance issues with the top triple had to use a 3mm washer to raise it up of the stem lock nuts as the zx12 ignition barrel does not fit correctly ! i have also had to modify the triple ignition mount and cut them down by 3mm also now all is well but no steering lock which i can live with at the mo.
From the top
|04-17-2012, 11:50 AM||#40|
Did run into another issue with the steering stop but just drilled and tapped the frame stop to m6 and fitted a bolt with a 4mm head and 4mm the other end which has given me good lock.
Got a 22mm 1mm pitch tap now to make my top lock nut to look factory, as you can see the zx12 top nut looks pants !
|04-17-2012, 01:47 PM||#41|
|04-17-2012, 01:56 PM||#42|
Zumina even though the stops are in the same place the handlebars point further back and the forks are also further back with the lower offset.
The b model zx12's have a 4mm less offset than the a1/a2 bringing my conversion in line pretty much with newer models.
|04-17-2012, 03:24 PM||#43|
Joined: Apr 2012
Of course, that was about a decade ago, so they surely must have crashed and burned by now....
BTW, I don't think you've deterred him, he's still posting.....
I've been running a VFR800 with RC51 upside down forks/triples/brakes for the past 6 years and zero handling difficulties. A little more ride height in the rear solved the longer trail problem due to triple clamp offset just fine.
The numbers are so close I'm certain he'll be good.
I await the results of the first road test of the ZX12/14r
|04-17-2012, 10:21 PM||#45|
My forks are extended at least 1/2 inch over stock by cutting the internal stops, but raised thru the triples 10mm, and I run the ass end up close to 3/4 inch.. no idea what the resulting rake/trail is.. guess I should have burst into flame by now..
Don't want to even discuss my widow maker TL1000 with the Busa forks, raised swingarm pivot and shim on the rear shock... :)
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