kz400 rotor options

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03 Sep 2015 07:37 #688430 by captain awesome
kz400 rotor options was created by captain awesome
Anyone out there happen to know of other "lighter" rotor off the shelf type options? This is for a 76 model, and I know the 440 won't fit.

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03 Sep 2015 07:51 - 03 Sep 2015 08:15 #688433 by captain awesome
Replied by captain awesome on topic kz400 rotor options
Here's the stock one for reference which is marked as 7.04mm thick:
[IMG


Maybe a kz305? Curious if it's any lighter though as I could drill the current one if that's what it comes down to. Offset is also something to consider.

This is the kz305 and it's marked 4.77mm in the ad:

[IMG
Last edit: 03 Sep 2015 08:15 by captain awesome.

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03 Sep 2015 08:34 - 03 Sep 2015 08:38 #688441 by SWest
Replied by SWest on topic kz400 rotor options
The outside diameter is the important part. Off set too. Mine are 11 5/8" a round approx. The drilled ones are 1/2 the weight so you can go duel. Steve



Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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Last edit: 03 Sep 2015 08:38 by SWest.

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03 Sep 2015 08:45 #688445 by captain awesome
Replied by captain awesome on topic kz400 rotor options
Is that on a kz400? What rotor is the one with holes? Bolt pattern? Etc?

I see the kz200 has a 4 bolt pattern as well and is a similar thickness to the kz305 but not drilled.

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03 Sep 2015 08:55 #688449 by SWest
Replied by SWest on topic kz400 rotor options
I'm leaving on a trip so here are the measurements.
OD 11 5/8"
Hub size 57.97 mm-2.28"
Bolt spacing 78.98 mm-3.109"
These are approximate and off a Z1/KZ 900-1000. Will fit other bikes too.
Yours may be smaller.
Just for reference.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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03 Sep 2015 11:15 #688465 by captain awesome
Replied by captain awesome on topic kz400 rotor options
Looks like the kz200 and kz400 hub share the 8x25 bolt. Unsure about pattern yet, but the kz305, 650, 750, and 1000 share the 10x30 bolt.
The kz200 disc is apparently thinner, but unsure of the OD, offset, and bolt pattern at the moment.

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03 Sep 2015 13:44 #688488 by SWest
Replied by SWest on topic kz400 rotor options
If the hub size and the bolt pattern are the same, you might be able to use a bushing for the bolts. Only other problem would be the outside diameter. If it's too big, all bets are off.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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03 Sep 2015 14:01 #688492 by captain awesome
Replied by captain awesome on topic kz400 rotor options
I'm going to get a good solid measurement from the stock kz400 rotor and see what I can compare to from there. Looks like the kh400 may be another option, but not sure yet.

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03 Sep 2015 15:19 #688498 by SWest
Replied by SWest on topic kz400 rotor options
You can have them drilled for $45 plus shipping.To go duel you may have to buy another fork leg and switch them around. You'll need a different fender and grind off a couple mounts. There's nothing like having good brakes.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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03 Sep 2015 15:21 #688499 by SWest
Replied by SWest on topic kz400 rotor options
Oh and that LF mark on the one disk, There's no left and right, he just wanted me to buy both. Didn't work. :woohoo:
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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03 Sep 2015 16:04 #688506 by captain awesome
Replied by captain awesome on topic kz400 rotor options
I may just get it drilled like you said. I think upgrading to a lighter caliper may be another place to consider. I have a lightweight tokico laying around but not sure if there would be enough spoke clearance yet.

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03 Sep 2015 16:22 - 03 Sep 2015 16:22 #688509 by 650ed
Replied by 650ed on topic kz400 rotor options
For drilling and/or resurfacing rotors check out these folks. Ed

www.truedisk.net/
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Last edit: 03 Sep 2015 16:22 by 650ed.
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