RZ/RD 350 & Misc. 2-Stroke Tech BBS

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PostPosted: Sun Aug 06, 2017 11:22 am 
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Location: Halifax, NS
I have a 4.5" SV650 rear rim that I need a Cush drive for to complete the FZ600 swingarm swap. Is the Katana 750 89-97 Cush the same, shallow profile to fit SV650 rim?

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PostPosted: Sun Aug 06, 2017 2:10 pm 
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Location: Ottawa, Canada
Check Ronayers.com for the part numbers..


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PostPosted: Mon Aug 07, 2017 11:47 am 
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Are you talking about just the rubbers?

The first gen SV650 and GS500 rubbers are identical. I know because I thought I had a problem with them, purchased the other ones, and they were identical.

BTW, I did not have a problem with them after all. :smt021

I found tons of the rubbers on eBay for around $10.

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PostPosted: Tue Aug 08, 2017 4:54 pm 
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Location: Southern Ontario, Canada
I have 3 Suzuki cush drives, GS500, SV650 (late) and 750 Katana. They all fit the 750 Katana wheel that I have fit to an RGV250 swingarm, but have different widths and use different spacers. The rubbers are all the same. The GS500 lines up almost perfect on the RZ with a 9mm offset sprocket. If you want me to measure the differences let me know, but off the top of my head the Katana puts the sprocket about 10mm further from the wheel centerline.


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PostPosted: Tue Aug 08, 2017 10:36 pm 
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Location: Halifax, NS
kpke wrote:
Are you talking about just the rubbers?

The first gen SV650 and GS500 rubbers are identical. I know because I thought I had a problem with them, purchased the other ones, and they were identical.

BTW, I did not have a problem with them after all. :smt021

I found tons of the rubbers on eBay for around $10.


I'm looking for the actual hub, I have some rubbers from the SV650 hub.


Thanks

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1985 RZ350F being restored now!
1987 RZ350 Stock
1985 RZ350F basket case
1985 RZ500 Stock


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PostPosted: Tue Aug 08, 2017 10:41 pm 
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RuZty wrote:
I have 3 Suzuki cush drives, GS500, SV650 (late) and 750 Katana. They all fit the 750 Katana wheel that I have fit to an RGV250 swingarm, but have different widths and use different spacers. The rubbers are all the same. The GS500 lines up almost perfect on the RZ with a 9mm offset sprocket. If you want me to measure the differences let me know, but off the top of my head the Katana puts the sprocket about 10mm further from the wheel centerline.


I have a later SV650 rim and hub, I would love to know the measurements of the GS500 hub, to compare to the SV hub and rim. I'm not sure what year my SV rim is off and don't want to buy the wrong hub off fleabag! The SV hub is really wide but it will help with some dims.

Thanks

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1987 RZ350 Stock
1985 RZ350F basket case
1985 RZ500 Stock


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PostPosted: Thu Aug 10, 2017 1:25 pm 
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In the pic below the middle one is 750 Katana, the one on the left is SV650 and the one on the right is GS500. The straight edge is resting on the sprocket face on the Katana cush drive so you can see the difference. They are dimensionally the same in every way except height and all fit the wheel the same, with the same rubbers, except for the spacer (Katana spacer shown on the right) which matches the width of the cush drive.

Image

The Katana unit is 49mm wide from the back face where it sits against the rubbers (bottom edge of the machined outer diameter) to the sprocket face. The SV650 is 46.3mm, and the GS500 is 33mm. The machined edge is about 4mm. If you started with the longer spacer of the Katana you could machine it down to suit either of the others, and you could use that 4mm lip as a buffer to fine tune your sprocket alignment, i.e.. run the cush drive a couple of mm further outboard, I don't see any ill effects this could cause.

Here is a pic of the back, you can see how the SV650 is hollowed out around the bolts with a stiffening web cast in, whereas the Katana is solid for the full 25 mm to the sprocket. This would be handy if you wanted to machine the sprocket face down to get your sprocket alignment right. I think there is enough room to hold the inner bore on the back in a 3 jaw chuck, but I haven't actually tried.

Image

Hope this helps, let me know if anything isn't clear.


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PostPosted: Tue Oct 31, 2017 8:01 pm 
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I'm looking to do something similar. I already have a FZR600 rear end with 18" FZR wheel and I have a 10MM offset countershaft sprocket. I'm looking to swap to a 93 Katana 750 wheel onto the rear of the bike. Would it be better to use the Katana cush drive and machine down the sprocket surface or buy a GS500 sprocket carrier? Also what year GS500 should I be looking for?

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