other USD fork options. - Wrist Twisters
 
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post #1 of 13 Old 08-04-2012, 02:09 PM Thread Starter
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other USD fork options.

I've almost got all my ducks in a row for a fork swap on the niner. Since ohlins doesn't make rc51 forks anymore and used sp2's are non existent, are there any other options that retain proper fork length and use a triple clamp that fits on the 919 frame ?

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post #2 of 13 Old 08-04-2012, 04:47 PM
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RC51 forks are not plentiful but far from non nonexistent.
Try this
RC51 Part Out SP1 - SP2 - Speedzilla Motorcycle Message Forums

What is wrong with SP1 forks?

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post #3 of 13 Old 08-04-2012, 06:01 PM
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Quote:
Originally Posted by Hondad View Post
RC51 forks are not plentiful but far from non nonexistent.
Try this
RC51 Part Out SP1 - SP2 - Speedzilla Motorcycle Message Forums

What is wrong with SP1 forks?
jump on that front end. $400 is a crazy deal. When forks are probably can be found, good rc51 front wheel for a descent price can be a problem

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post #4 of 13 Old 08-04-2012, 06:11 PM
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Quote:
Originally Posted by zaq123 View Post
jump on that front end. $400 is a crazy deal. When forks are probably can be found, good rc51 front wheel for a descent price can be a problem
^^ THIS

I picked up a SP2 front end on here, minus the wheel, and I've still not found a SP1 front wheel for less than what I paid for the triples and forks. I'm only looking for a SP1 wheel as I already have a 6-spoke CBR900 rear wheel ready to go for the swap.

You should seriously consider that deal.

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post #5 of 13 Old 08-04-2012, 09:29 PM Thread Starter
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Holy crap , good find. I'm gonna see what I can do to pick that up asap.

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post #6 of 13 Old 08-07-2012, 08:13 AM Thread Starter
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Dan Kyle has recently informed me that a zx14 fork uses 50/54 clamps and is the same length as rc51 forks.

Can anyone help with figuring out what clamps and wheel will work while having everything line up correctly ?

Second thought... would swapping for f4 forks with racetech valves and springs have a better cost benefit ratio or is the stiffness of USD forks and radial calipers that much better ?

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post #7 of 13 Old 08-07-2012, 09:10 AM
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Do you want a set of zx9 forks? I have a set of those...just don't have the time or resources to graft them to the 9er

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post #8 of 13 Old 08-07-2012, 10:23 AM
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Quote:
Originally Posted by Ferris Bueller View Post
Dan Kyle has recently informed me that a zx14 fork uses 50/54 clamps and is the same length as rc51 forks.

Can anyone help with figuring out what clamps and wheel will work while having everything line up correctly ?
Quote:
Originally Posted by velodesign View Post
Do you want a set of zx9 forks? I have a set of those...just don't have the time or resources to graft them to the 9er
I would get length measurements on the ZX9 and ZX14 forks. If they're the same length, you know that Velo has a set available.

I'm pretty sure the 50/54mm fork taper is relatively common, so that'll help in your search for triples.

I would guess that the stem would be the biggest obstacle. Get the correct length & diameter stem and bearings pressed into the ZX triples and the rest of the project should be pretty straight forward.

You should figure out the front axle diameter and bearing size to see if there is a 6-spoke wheel (Honda or other) that will fit the ZX forks. If you find a wheel you like but it doesn't line up perfectly, find a shop with a lathe and have a set of custom wheel spacers made.

Various ZX calipers and fenders should bolt on.

You may need to make custom brackets for your gauges, key switch, & headlight.

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post #9 of 13 Old 08-07-2012, 12:53 PM
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I can measure tonight. From what I remember, they are very close or near the original 9ers length and includes a 3 spoke rim and tire already :-) shameless plug but if he can use them then why not right?

Here they are...
https://www.wristtwisters.com/forums/...0-a-31105.html

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post #10 of 13 Old 08-07-2012, 06:46 PM
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Ok, for the sake of trying, I measured them up. Looks to be about 30.6 from top tube to center bearing on the lower.

Doing a quick measure on my 9er they are about 29.3.

Keep in mind the zx9 setup doesn't have 400 lbs on it for bike sag so they are long enough.

There you have it.

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post #11 of 13 Old 08-09-2012, 06:12 AM
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Quote:
Originally Posted by Ferris Bueller View Post
...Second thought... would swapping for f4 forks with racetech valves and springs have a better cost benefit ratio or is the stiffness of USD forks and radial calipers that much better ?
C'mon Bueller! You know even if the f4/racetech forks are better bang for the buck, the USD's are just waaay cooler looking and thats the best reason to get 'em!

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post #12 of 13 Old 08-09-2012, 07:01 AM Thread Starter
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Quote:
Originally Posted by honda ng gingsa

C'mon Bueller! You know even if the f4/racetech forks are better bang for the buck, the USD's are just waaay cooler looking and thats the best reason to get 'em!
This is true. I've been doing some thinking and the kaw front end would be cheaper but I'm not sure about putting kaw parts on my soon to be frankenhonda.

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post #13 of 13 Old 08-09-2012, 07:50 AM
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Quote:
Originally Posted by Ferris Bueller View Post
This is true. I've been doing some thinking and the kaw front end would be cheaper but I'm not sure about putting kaw parts on my soon to be frankenhonda.
Seen this GSXR front end on the 9'er? Looks purdy! Not sure if it replicates the fork/rake of the stocker though.

https://www.wristtwisters.com/forums/...tml#post517244

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