rgv wheel swap

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RuZty
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Re: rgv wheel swap

#16 Post by RuZty » Fri May 08, 2015 10:12 pm

I've just finished lining up a 750 Katana wheel in an RGV swinger. The GS500 cush drive puts the chain line very close to where the edge of the tire will be, so I'm using a 9mm offset front sprocket and machining down the Katana cush drive. I tried an SV650 cush but it would also need machining and has less material internally to do so without weakening it. They are all the same on the wheel side, just different widths.
I'm using inverted R6 forks with a mid 90's GSXR front wheel to match the rear. The rotor spacing is pretty much bang on and same diameter for the radial Yamaha calipers, just need to machine an R6 bearing spacer and swap in RC51 front bearings. (6204 with a 22mm ID)

subxero
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Re: rgv wheel swap

#17 Post by subxero » Fri May 08, 2015 10:59 pm

does anyone know for certain what rear axle will direct swap with the vj22? It just needs to be the right diameter and close to same length

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Re: rgv wheel swap

#18 Post by JonW » Sat May 09, 2015 3:58 am

GSXR400?
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Re: rgv wheel swap

#19 Post by subxero » Sat May 09, 2015 9:39 pm

^ ill give it a try if i can find one cheap

RuZty
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Re: rgv wheel swap

#20 Post by RuZty » Sun May 10, 2015 8:35 am

Make sure you are good on length, I tried to run a die down a GSXR axle once to get enough thread to shorten it for use in a different swing arm, it was a tough SOB.

subxero
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Re: rgv wheel swap

#21 Post by subxero » Sun May 10, 2015 9:51 am

^ thanks, i was wondering if this was a possibility or not

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two-stroke-brit
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Re: rgv wheel swap

#22 Post by two-stroke-brit » Sun May 10, 2015 1:49 pm

i would think the threads on the axles are rolled on not cut (makes a stronger thread and quicker too).
a die never seems to cut a clean thread if you try to extend it..
if you don't need too much you can use wider or additional washers/spacers on the axle to take up the space .
it just depends on how much room you have around the ends.
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RuZty
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Re: rgv wheel swap

#23 Post by RuZty » Sun May 10, 2015 4:17 pm

two-stroke-brit wrote:i would think the threads on the axles are rolled on not cut (makes a stronger thread and quicker too).
a die never seems to cut a clean thread if you try to extend it..
That's another reason I didn't like it and binned it.

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busa1300
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Re: rgv wheel swap

#24 Post by busa1300 » Sat May 16, 2015 11:04 am

I have a RF600 3.5x17 front on my RGV250 SP....direct bolt on if you want to use a 120x70x17 tire
A GSXR 600-750-1100 wheel will not work as direct bolt in to RGV forks

Possibly a RF600 rear axle........
Last edited by busa1300 on Sat May 16, 2015 1:09 pm, edited 1 time in total.
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Re: rgv wheel swap

#25 Post by RuZty » Sat May 16, 2015 12:22 pm

The things to consider with any non-standard wheel fork combo are;

-New versus original axle diameter: if they are different can the bearings be swapped to fit the destination axle? If not and they are oversize you could make sleeved spacers to fit the wheel to a smaller axle. Making a smaller axle isn't an acceptable solution (in my opinion) on inverted forks because the axle diameter is sized proportional to the fork lowers to create a rigid assembly. Reducing this compromises the main reason for upgrading in the first place. Bearing width/spacing is easy to fix with custom spacers, just make sure you don't side load the bearings or forks when it's assembled.

-Brake rotor diameter: are the forks designed for the same size rotors that came with the wheel you are swapping in? (assuming you are using the original calipers that the forks came with). If the forks need larger rotors you can surf catalogs from EBC, Brembo or Ferodo to find compatible rotors from other models to bolt on to your wheels. If the forks came with smaller rotors maybe you can add caliper adapters to accommodate them. This is easier with radial mount calipers because it is simply a doweled spacer under the caliper. Putting massive rotors on forks that weren't designed for them is a bad idea because the braking loads will be higher than what the forks were designed for.

-Brake rotor spacing: this is trickier, it's generally not documented anywhere so you will have to measure wheels you are considering. You can make spacers to move the rotors outboard, but not inboard. Radial calipers cannot be spaced in or out so you have to make the rotors work. Non-radial mount calipers offer more flexibility.

MOST IMPORTANT PART - The original parts were designed as a system, or at least confirmed to work as one, by someone who understands the forces involved. If you change parts of the system without fully understanding how they relate or take creative liberty (read hack it together) to make things fit, you could get hurt. Making parts fit together isn't the same as making parts work together. Steering and braking are the most important part of the bike.

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