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Front end conversion idea - thoughts?

Old 01-08-2015, 08:37 PM
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Front end conversion idea - thoughts?

Hey guys... This is my future plan for my front end upgrade. Regardless of your opinions on this particular conversion, please share with me whether my plans have any holes or problems... Right now it's just a theory, but i think this could give me a nice, budget front end, with powerful brakes, maintaining the narrow front fork spacing to clear the fairings...

93-97 cbr900rr triple clamps
98-99 cbr900rr fork tubes
Cbr600f3 17" front wheel
Cbr929rr brake calipers
97-98 Cbr1100xx 310mm wave rotors

Thanks!
James
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Old 01-08-2015, 09:02 PM
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should work, though you may have to shim the calipers or rotors slightly....900RR forks work very well on the VTR.... don't forget to get a decent MC (preferably radial) for the brakes (a late model OEM Ducati/Brembo works very well with 929 calipers....)

Good luck
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Old 01-09-2015, 01:22 AM
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If I was going to do it which Im thinking about is go CBR1000 USD or GSXR USD. If Im going to do it I want to do it properly. My thoughts are if Im going to do it may as well do it right.

I reckon a stock fork with a brace is is just as good as a CBR900 fork.
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Old 01-09-2015, 04:42 AM
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i too wouldnt bother with the 900 stuff . a good 04-15 blade front end be best . why replace old out of date suspension with old out of date suspension.
i have a full 929 blade front end on mine as i got it free . if i was to do it again id have gone for the 06 front end and had the forks revalved and new springs .
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Old 01-09-2015, 06:46 AM
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I say go for it!
its how I did mine at 1st.
the bike is old and outdated.
why should the rest be any different?
I will add...those forks do have a good bit of stiction.
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Old 01-11-2015, 11:25 AM
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The bike has "tune flex" so forks that are not uber stiff (rwu) may be the best call......900rr are still very good forks when done up right.
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Old 01-11-2015, 11:43 AM
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They were good enough for the Moriwaki race bikes.......
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Old 01-11-2015, 12:13 PM
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Originally Posted by mikstr View Post
They were good enough for the Moriwaki race bikes.......
and that was my motivation to fit them when i did.
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Old 01-11-2015, 12:59 PM
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Originally Posted by mikstr View Post
They were good enough for the Moriwaki race bikes.......
As these were made to look like factory bikes they couldn't fit USDs.
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Old 01-11-2015, 01:06 PM
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Not sure about that. There are multiple threads talking about someone fitting a USD Paoli fork years ago and finding it was too stiff for the track... Not to nay say anyone doing a usd conversion....

To get this thread back on track: I was just wondering if anyone saw any PROBLEMS.sith my wish list... Like if something doesn't fit right or something... Not really looking for critiques on whether it's better or worse than a USD setup...

James
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Old 01-11-2015, 01:58 PM
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Originally Posted by NZSpokes View Post
As these were made to look like factory bikes they couldn't fit USDs.
I suggest you write Roger Ditchfield to test your theory and report back...


now then, back to the topic at hand, the only possible problem would be regarding spacing the rotors in relation to the caliper. However, the fact that you are using axial calipers (instead of radial mount) does give you some provision for making adjustments in this regard so it shouldn't be difficult to overcome, assuming it even is an issue...

Last edited by mikstr; 01-11-2015 at 02:02 PM.
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Old 01-11-2015, 02:11 PM
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Thanks

James
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Old 01-11-2015, 04:36 PM
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Originally Posted by thedeatons View Post
Not sure about that. There are multiple threads talking about someone fitting a USD Paoli fork years ago and finding it was too stiff for the track... Not to nay say anyone doing a usd conversion....

To get this thread back on track: I was just wondering if anyone saw any PROBLEMS.sith my wish list... Like if something doesn't fit right or something... Not really looking for critiques on whether it's better or worse than a USD setup...

James
To be fair I don't see a problem with the stock fork. On the track its fine. Yes mine has Gold valves, .95 springs and a brace.


If I can hold GSXR750s off then I don't see an issue. And im a fat bugger.
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Old 01-11-2015, 07:19 PM
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Spokes that's no logic. On a track a bike is like sneakers on a basketball court. They may be nice but all the speed is the rider.

I have beat ninja 1000s on my ninja 500. And it wasn't because the forks were any good.

You should do your fork swap if that's what you want to do. I just feel like if I did that then in a couple months I would wish for CBR forks so would just do that the first time.

Guessing you already have all the stuff? I mean, what about, say, this?
2002 2003 02 03 Honda CBR900RR CBR954RR CBR 954RR 954 Front Suspension Forks Set | eBay

tempting, huh?
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Old 01-11-2015, 08:02 PM
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Yeah that is nice...

I really won't be diving into this until next winter...

This winter was lots of powdercoating, and hopefully tires.

James
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Old 01-11-2015, 11:23 PM
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Originally Posted by smokinjoe73 View Post
Spokes that's no logic. On a track a bike is like sneakers on a basketball court. They may be nice but all the speed is the rider.

I have beat ninja 1000s on my ninja 500. And it wasn't because the forks were any good.
Agreed 100%. I get my **** handed to me by Hyosung 250s that go round the outside of me on turns. Least I get them back on the straights. This is not a fork fault....

I feel the same about the brakes, with HH+ pads and braided lines the thing stops brilliantly. Ton of feel and power.
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Old 01-12-2015, 12:33 AM
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Its not the Hyosung's. Its the spotty, utterly fearless 14-16 year olds on them.
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Old 01-12-2015, 05:46 AM
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Lol...
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Old 01-12-2015, 08:40 AM
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Take into account the ratio of MC to caliper. This thread has dimensions of common swap MC and calipers.
https://www.superhawkforum.com/forum...ke-mods-13176/
Also here is a chart that might be helpful.
mc-front-rotor-sizes.pdf
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Old 01-12-2015, 09:52 AM
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Originally Posted by xeris View Post
Take into account the ratio of MC to caliper.
see post #2.... this, after having tried numerous MCs (incl. SP2, Nissin 19x18 radial)....
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Old 01-12-2015, 09:57 AM
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Originally Posted by Kieran View Post
Its not the Hyosung's. Its the spotty, utterly fearless 14-16 year olds on them.
I know right. Their nappies get caught in the chain is the only problem.
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Old 01-12-2015, 03:09 PM
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lol
It was worse when they were riding RG150's. With their little narrow tyres (castoff 125gp slicks) and a fearless rider they held a really disturbingly high corner speed...
If you followed them close enough you could see the rear end pogoing through the loop at Teretonga as the cheap suspension loaded up and unloaded.
No wonder them nappies were full...
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Old 01-12-2015, 03:36 PM
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As for the threads original question, I think it sounds like a great idea. Lot of people have gone the 900rr forks route, and there's not much people have to say bad about them.

What size was the original disks on the 900rr? or the 929?
You might have to put the thing together to find out what size disks you need, or if you have to put the caliper on a spacer plate to match the disks you have...
I would be tempted to use the 900rr calipers, so you know what you are working with from scratch.

I am putting ZX10r forks on mine, using stock calipers, so I know I 'need' 300mm disks from scratch. I am using the stock VTR front wheel, so I should be able to get away with the stock 298mm front disks...
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Old 01-12-2015, 05:29 PM
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Kieran, ZX10 forks with stock vtr calipers? I think thats extremely difficult. Two totally different mounting as one is radial.
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Old 01-13-2015, 12:20 AM
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Stock ZX10r calipers. My bad
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