Rear wheel with rotor brake substitute

Yes, the Suzuki is a known quantity. Here are my three proven options (1978 Kawasaki Z1000, Triumph 900 Legend, Kawasaki KLR650) - the first two probably hard to source. Mine all run with 17 inch rims, but any wheel builder can accommodate whatever rim you want.
 

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Yes, the Suzuki is a known quantity. Here are my three proven options (1978 Kawasaki Z1000, Triumph 900 Legend, Kawasaki KLR650) - the first two probably hard to source. Mine all run with 17 inch rims, but any wheel builder can accommodate whatever rim you want.
Thanks, that's good info. Interesting place for the calipers, but, hey, it works!
They all look good. Pictures sure help.
 
Cant see any reasons they wouldn't. I'm thinking set the hub up for the chain run then centre the rim accordingly by having it laced off set if need be. Find a nice 18" ally rim to lace onto the hub. Go for a 3.5" so you can run wider tyres. Think Vince uses a 140 on his wider rim.
 
I have a 140 rear tyre on my 3inch rim. That's the biggest Borani style rim that's made, you can get different sectioned alloy rims that are made wider but I wanted Borani section type. It's a touch undersised for that tyre but in reality, it measures up 5mm smaller when fitted. I have no handling issues that I have found doing this. Which reminds me, must check my tyres for the coming Snowy Ride. BTW that 140 T31 Bridgestone is the smallest Radial tyre available.
 
Decided to get this, now to get it to fit.
Well, at least if it doesn't work you have a spare for your DR650. It'll work though. It just takes some nutting out, like my Ducati hubs for my GSX1400, and on my 880SFCK.
 

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Well, at least if it doesn't work you have a spare for your DR650. It'll work though. It just takes some nutting out, like my Ducati hubs for my GSX1400, and on my 880SFCK.
Yeah, just might be the excuse I need to justify a bigger lathe😉.
I found a top guy nearby that can build spoke wheels if I need him too.
These covid lock downs have some advantages.... if you can't ride, wrench.
 
Good move.
The 'odd' caliper placement was my underslung reverse linkage suck-it-and-see pro-squat design - worked so well i never needed to change it! Only works with SF swingarms, as they have more width. SFQ has a more conventional underslung parallel torque arm (neutral squat).

Yes, the KLRs have 17 inch rears - mine had a chrome Takasago rim on it (older model than yours i'd say). I had to use a spacer for the rear disc to get enough width for the torque arm to clear the 160x17 inch rear tyre. I've ended up not using that hub yet.

Hopefully the hole pattern for the rim will be fairly easy to replicate in an 18 - might even be able to source a 3 or 3.5 inch alloy rim for the KLR hub ready to lace?

I did all my disc carrier and cush drive machining on my little Emco Compact 8 - only swings about 105mm (max 210mm OD circles) - and that was fine.

If you want any help or advice setting things up for it, just PM me. Out of interest, what width is the rim on the hub you bought?
 
Update so far so good. Received the 1992 KLR 650 complete wheel assembly already and it looks good. Alloy rim, and size within 5mm of Lav rim width. Good cush rubbers, still has full 5mm width on brake rotor. 17" diameter vs 18" but I'm using it anyway, no re-spoke for now.
Minimum Mods:
A)I'm keeping the Lav wide chain and sprockets so I will have to drill 4 more mounting holes in the Lav rear sprocket to mount onto the existing KLR cush drive.
B) New spacers to cut on the lathe.
C) Bought a KLR floating brake caliper and support arm on fleabay.
I'll probably mount that to a position under and rearward on the existing rotor. The Lav Brembo is much too big, interferes with the spokes.
D) Clean the new wheel.
E) New tire, 130/80 -17.
 

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That looks even better than my 17x4.25 inch plan. It looks as though the rear sprocket has the same ID? If that's the case AND the PCD of the sprocket bolt pattern is the same (or close enough to slot the Lav sprocket and drill four more holes) then that is an incredibly good match.

What great advice you go her, Chuck! :cool:. I'd be interested to know how wide the std 17 inch rim is - any stampings? If not, you should be able to get an idea with a ruler or vernier. Should be at least 3 inches.
 
Got a pic of the caliper? Or is that on the way from FleaBay? Yes, the 08 rear caliper and 280mm Brembo was overkill for a rear brake - just like the massive rear drum. Space and unsprung weight savings just crying out to be exploited.
 
Your questions:
The rear sprocket bolt pattern PCD is the same which is good. However the KLR sprocket o.d. mount is 120mm and the Lav i.d. sprocket is 123mm. Mismatch but I'm hoping the 8 bolts will keep it centered. If not I have to search for a different sprocket or fashion a spacer. The 8 bolts on the KLR sprocket mount are all M8, the 4 holes on the Lav sprocket are M10. A difference for 4 of them but some inserts could fix that or a modified M8 with a wide shaft.

The KLR alloy wire rim width is 83mm (approx 3 1/4") vs 88mm (approx 3 1/2") for the Lav alloy wheel.
Pic of the caliper, and the Lavsaki 8 bolt sprocket.

Agree, great advice here😉
 

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Chuck,

Relying on the bolts alone to keep the sprocket centred will not work. Radial run-out must be kept to less than 0.3mm, more will play havoc with chain tension and longevity. Even you do get run-out within such limits, I seriously doubt it will remain so for very long.

Get yourself a sprocket blank and machine that to suit.

piet
 
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