Drilled to perfection,,,
- Bluemeanie
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Drilled to perfection,,,
12 Nov 2008 06:06
How cool is this? Check out this rear rotor! If your gonna drill why not personalize it. I assume it says Z1000 across the top half. Way cool...

1980 KZ650F1, Bought new out the door for $2,162.98!
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- The Milkman
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Re: Drilled to perfection,,,
12 Nov 2008 13:52
It sure looks cool but I'm wondering how safe it is with all those spots where there isn't much metal left,,




78 650-C2, Stock engine, Jardine 4-2 Exh., 17-38 sprockets, dyna ignition and coils, coil wiring mod, carb mod.
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- Patton
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Re: Drilled to perfection,,,
12 Nov 2008 14:52
Maybe each "hole" is just barely started and not drilled all the way through.

1973 Z1
KZ900 LTD
KZ900 LTD
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- Evilfrog
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Re: Drilled to perfection,,,
13 Nov 2008 07:03
From what I remember about my community college physics class...
Surface area has nothing to do with stopping power. Coefficient_of_friction and force applied is what determines stopping power. A rotor the size of a penny and a break pad the size of needle would have the same stopping force if the same pressure is applied.
However; that set up would melt and meld together as soon as the break is pressed. Larger pads and rotors are for heat distribution. So this set up should be fine as far as stopping the bike...
Unless the rotor breaks. Then you're screwed.
Disclaimer: The above is a product of a physics 101 at a Community College. So please feel free to correct me if I am wrong.
Surface area has nothing to do with stopping power. Coefficient_of_friction and force applied is what determines stopping power. A rotor the size of a penny and a break pad the size of needle would have the same stopping force if the same pressure is applied.
However; that set up would melt and meld together as soon as the break is pressed. Larger pads and rotors are for heat distribution. So this set up should be fine as far as stopping the bike...
Unless the rotor breaks. Then you're screwed.
Disclaimer: The above is a product of a physics 101 at a Community College. So please feel free to correct me if I am wrong.
1981? CSR 1000 -- I'll figure it out soon enough.
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- harm
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Re: Drilled to perfection,,,
13 Nov 2008 09:08 - 13 Nov 2008 09:15
That won't break and it looks cool!
Some of you may remember the sprocket i made, it has held up great with no real signs of wear after 3k miles!
Some of you may remember the sprocket i made, it has held up great with no real signs of wear after 3k miles!
Tom
Holland, MI
1980 KZ550 ELR
2011 Concours14
2017 KX450 [/color]
Holland, MI
1980 KZ550 ELR
2011 Concours14
2017 KX450 [/color]
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- rstnick
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Re: Drilled to perfection,,,
13 Nov 2008 13:31
What about the balance of the rotor?
May not have too much affect, but I believe the stock kawi drilled rotors were ballanced.
May not have too much affect, but I believe the stock kawi drilled rotors were ballanced.
Rob
CANADA
Need a key for your Kawasaki? PM me
1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, ZRX shocks, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R - Wife's
2005 z750s
1978 KZ1000 project
1983 KZ1000R2 Project
CANADA
Need a key for your Kawasaki? PM me
1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, ZRX shocks, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R - Wife's
2005 z750s
1978 KZ1000 project
1983 KZ1000R2 Project
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- donthekawguy
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Re: Drilled to perfection,,,
13 Nov 2008 23:37
I would worry about it cracking between the holes. Some of them look pretty close.
Rathdrum Idaho
1971 Kawasaki g3ss
1972 Yamaha R5 350
1965 Suzuki Hillbilly
1964 Yamaha 125
1971 Kawasaki g3ss
1972 Yamaha R5 350
1965 Suzuki Hillbilly
1964 Yamaha 125
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- steell
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Re: Drilled to perfection,,,
14 Nov 2008 05:12Coefficient_of_friction and force applied is what determines stopping power.
I believe you forgot to take into account the increased leverage available due to the larger distance between the caliper and the axle centerline with a larger rotor. That has a very large effect.
To illustrate:
There are two bikes here, GPz750 Turbo and KZ750 twin, both weigh about the same, have same diameter master cylinder, and same calipers, but the Turbo has 10" rotors while the 750 twin has 12" rotors.
And the 750 twin will easily stop faster in a shorter distance than the Turbo in side by side comparisons.
KD9JUR
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- Old Man Rock
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Re: Drilled to perfection,,,
14 Nov 2008 05:25
With out going into all the physics associated with the concept, I'm with Blue on this one, way cool indeed... 
I'm sure the bike stops well enough for not all of us are driving at 100mph plus on a regular basis.
The guy/gal probably drives his bike as I plan to do (when project completed) where keeping to the speed limits (+/- 10 mph), leaving enough distance between me and the car in front of me and keeping an eye on my surroundings due to all the BS people on their cell phones not paying attention...
Sweet Meanie!
OMR

I'm sure the bike stops well enough for not all of us are driving at 100mph plus on a regular basis.
The guy/gal probably drives his bike as I plan to do (when project completed) where keeping to the speed limits (+/- 10 mph), leaving enough distance between me and the car in front of me and keeping an eye on my surroundings due to all the BS people on their cell phones not paying attention...
Sweet Meanie!
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- PLUMMEN
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Re: Drilled to perfection,,,
14 Nov 2008 05:59
harm wrote:
that sprocket is pretty cool looking !

Still recovering,some days are better than others.
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