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CBR SWAP DILEMA

Old 05-22-2010, 02:42 AM
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CBR SWAP DILEMA

OK so after all winter of collecting parts, I have the front end 90% on the bike but I am using CBR1000RR bottome triples & 954 tops. It all seemed to fit together in my living room but now on the bike the top triple doesnt seem to fit. Is this combo even doable or do I need the 1000RR top triple. Someone who knows please help, the bike is hanging from tie downs right now............
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Old 05-22-2010, 03:29 AM
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The triples from the 1000RR and 954RR are different width and will never fit together... You need both to be either 1000RR or 929/954...

I'd recommend the 929/954 combo as the wider 1000RR triples make it neccessary to cut up the fairings...
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Old 05-22-2010, 10:34 AM
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I have a 954 lower already modified for a VTR I sell you for a good price....
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Old 05-22-2010, 11:10 AM
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So my only issue is that I just bought & installed the all ***** tapered bearings. Also, I am using the 1000RR front wheel & brakes which needs the 1K triple width. If I go with the 954 whole setup I would at least need new spacers. not to mention brake alignment issues
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Old 05-22-2010, 11:14 AM
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Well the triple I have already has bearings and is ready to go.........
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Old 05-22-2010, 11:23 AM
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I didn't read the whole thing, but you should find your answer in this thread;
https://www.superhawkforum.com/forum...ight=fork+swap
If not, then just shoot Greg (hawkrider) a PM.
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Old 05-22-2010, 11:25 AM
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Originally Posted by smokinjoe73 View Post
So my only issue is that I just bought & installed the all ***** tapered bearings. Also, I am using the 1000RR front wheel & brakes which needs the 1K triple width. If I go with the 954 whole setup I would at least need new spacers. not to mention brake alignment issues
Sorry... But You are way off...

I'm using a 954 triple and a 1000RR legs/wheel... Just use the triple that 8541 has and you are good to go... All the 1000RR spacers and all other parts match right up...
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Old 05-22-2010, 11:47 AM
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Originally Posted by Tweety View Post
Sorry... But You are way off...

I'm using a 954 triple and a 1000RR legs/wheel... Just use the triple that 8541 has and you are good to go... All the 1000RR spacers and all other parts match right up...
It seems like this contradicts your earlier statement
The triples from the 1000RR and 954RR are different width...
I know... I know... I am butting in on a thread i have no business being in, but i can understand smokinjoe73's confusion!
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Old 05-22-2010, 02:48 PM
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No, not a problem... It's only confusing if you look at the numbers, not what they mean...

The RC51(SP1)/929/954 triples are the same width and are mix and match... The 1000RR are 3 mm wider between the legs... That means you can not mix them with the others... If you use a lower 1000RR triple you have to use a 1000RR upper triple... Same goes for RC51 (SP2) which doesn't mix with the VTR headstock...

Now for the wheel.. All of them use a "clamp fit" ie the wheel and spacers form a rigid "tube" that is clamped between the legs... The width of this is the same dor all of them, ie even if the upper part is wider, the distance they clamp at the bottom is the same... So as long as you use a matching set of 1000RR parts all the way through, substituting the triple it all works...

One thing becomes "out of alignment", the brake rotors are fixed in reference to the wider triple, so each set of brake pads become 1.5 mm out of dead center in the calipers... Since the calipers are "self adjusting" it means they "automagicly" compensate and the only thing is that you might want to swap the pads before they are completely worn out as it is possible to overextend the inside pistons to where the seals will leak if the pads are completely worn (way beyond recommended wear)

Now, all of this info is well discussed and in all the threads it has come up me and several other have stated numerous times that you can use 1000RR triples but not mix them, and that it is recommended to use 929/954 triples with an otherwise 1000RR front end based on the above and the fact a non gull-wing RC51(SP1) upper triple won't work with the short 1000RR fork...

Not trying to be a "know it all", just giving all the info collected in one thread to avoid confusion... Again...
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Old 05-22-2010, 05:02 PM
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So the combined wheel and spacer width on a 1000rr front matches the combined wheel and spacer width on a 929/954 front?
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Old 05-22-2010, 05:09 PM
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Yep...
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Old 05-22-2010, 05:10 PM
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Originally Posted by Tweety View Post
Yep...
Ah! The missing piece...Now it all makes sense.
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Old 05-22-2010, 10:34 PM
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Yup, this is why I was able to just bolt my CBR1000RR wheel into my otherwise 954 front end.
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Old 05-23-2010, 01:41 AM
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Ok, this sort of makes sense, even though it is not intuitive. So I just need the 954 lower triple. This is easily my longest bike project ever! All winter buying parts & still not quite there. 8541; a pm is on your way...........
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Old 05-23-2010, 07:35 AM
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Nah, nah, nah... It makes perfect sense... They are all Honda parts, so it's obvious that they fit together...

Infact that how I built most of my crap... I go, hmm... That fits there, and that fits there and that will fit there once I'm done with it....
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Old 05-23-2010, 11:29 AM
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One other issue is that the RR triple is only a tiny bit wider than the 954. I think I can just go with the RR trips since I need the front end lower due to the fact that I am doing the install on an SSS bike. It already needed the forks way up in the triples.
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Old 05-23-2010, 12:03 PM
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There is no height difference between the 1000RR and 929/954 triples... And the tiny bit wider is enough that you have to cut the fairings a few mm each side to get clearance... But other than that, yes you can...
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Old 05-23-2010, 10:45 PM
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But shouldn't the difference in offset have an effect on geometry & handling? (the difference between the RR & 954 offsets).
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Old 05-24-2010, 01:19 AM
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Of course any difference there counts... But the differences are small... And regardless of the numbers, it's useless trying to figure out which works best since I'm fairly certain you do not know the final ride height & angle of the frame/headstock? So until you have it assembled, it's just guesswork...

I'd say the cost of an 1000RR upper is negligible (and you can always sell it), I'd get one set of each, and then measure it in place, since you seem to like the idea of the complete 1000RR setup... Me, I'm lazy... I went with a known working setup and used a 929/954 triple... I'm not trying to convince you either way...
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Old 05-24-2010, 08:24 AM
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Yeah, I had the same thought so I am going to try the RR upper. It seems only millimeters wider, & I dont think there is a real clearance issue. If so, I will go with the 954/929 deal.
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Old 01-02-2011, 06:34 PM
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Thought I would dig this one from the grave since i'm working on the same swap now...I'm planning to use all 1000rr parts so all this triple clamp/wheel spacing doesn't effect me, but reading this I had a question that I can't leave unanswered...or it'll spread and infect me and I won't be able to stop wondering...



Originally Posted by Tweety View Post
The RC51(SP1)/929/954 triples are the same width and are mix and match... The 1000RR are 3 mm wider between the legs... That means you can not mix them with the others... If you use a lower 1000RR triple you have to use a 1000RR upper triple...

Now for the wheel.. All of them use a "clamp fit" ie the wheel and spacers form a rigid "tube" that is clamped between the legs... The width of this is the same dor all of them, ie even if the upper part is wider, the distance they clamp at the bottom is the same... So as long as you use a matching set of 1000RR parts all the way through, substituting the triple it all works...

One thing becomes "out of alignment", the brake rotors are fixed in reference to the wider triple, so each set of brake pads become 1.5 mm out of dead center in the calipers... Since the calipers are "self adjusting" it means they "automagicly" compensate and the only thing is that you might want to swap the pads before they are completely worn out as it is possible to overextend the inside pistons to where the seals will leak if the pads are completely worn (way beyond recommended wear)
Originally Posted by AngryOlaf View Post
So the combined wheel and spacer width on a 1000rr front matches the combined wheel and spacer width on a 929/954 front?
Originally Posted by Tweety View Post
Yep...

The question I have is this...Say you're using 1000rr Forks with 1000rr wheel/spacers(same width as 929/954) which are meant for the 3mm wider 1000rr triples. I would imagine when you switch to the 929/954 triples which bring the tops of the forks closer together, that using the same wheel/spacer combo would cause the forks to angle toward each other at the top like this / \

Is the 1.5mm movement and slight angle not enough to cause a problem? I would think it would create binding as the forks compress.

The solution would be 1.5mm shorter wheel spacers right? Maybe it wasn't mentioned because it's a no-brainer? or is there something I'm missing?
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Old 01-02-2011, 07:57 PM
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so why would one go thru all that to change the front end what kind of improvement does it give to the ride
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Old 01-02-2011, 08:52 PM
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The CBR is a much more modern and high performance bike & front end. They are upside down forks (male slider) with much more adjustability as well as being thicker and stiffer. Also they have way better brakes (radial calipers and master). I dont think you need to worry about it. There are alot of improvements you can make to the stock forks.
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