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11 Jun 2015 17:54 #676231 by Mellvis
Replied by Mellvis on topic Tell me I did good!
Can't quote the book, but 710 pounds is what sticks in my mind. 120 horsepower. Someone stated about the KZ1300: "Purrs like a kitten, Runs like a cheetah, roars like a lion. That stump needs pulled........... get a rope!"

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  • SWest
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11 Jun 2015 18:03 #676232 by SWest
Replied by SWest on topic Tell me I did good!
My Z1 is 568. They measure HP at the crank. A shaft robs ponies. I'd like to see what it would put out on a Dyno.
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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21 Jun 2015 09:30 #677586 by saxjonz
Replied by saxjonz on topic Tell me I did good!
Dirty and Huge :dry: :woohoo: :whistle:

Mellvis wrote: I'm working on picture. Not very smart, the wifey will have to do it. IT'S DIRTY!!! (and huge!)

79 LTD B3
80 LTD B4 1075 kit JE Pistons .410 cam grind, Bassani, 31 keihin CR Specials...
1980 Z1R, 2002 ZRX1200, 2003 ZRX1200

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21 Jun 2015 09:34 #677588 by saxjonz
Replied by saxjonz on topic Tell me I did good!
That is true but a shaft is like instant on power. I loved my 850 shaft but it was my first bike. At 7 pounds per pony better shave Divide 200 in to that number and find out how many to subtract from that 120 at the crank routine. My guess is to just keep her stock with a few bolt on mods and enjoy the snot out of her and don't worry about the weight or the HP.

swest wrote: My Z1 is 568. They measure HP at the crank. A shaft robs ponies. I'd like to see what it would put out on a Dyno.
Steve

79 LTD B3
80 LTD B4 1075 kit JE Pistons .410 cam grind, Bassani, 31 keihin CR Specials...
1980 Z1R, 2002 ZRX1200, 2003 ZRX1200

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21 Jun 2015 10:22 #677596 by SWest
Replied by SWest on topic Tell me I did good!
Yeah and you don't have a chain to deal with.
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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25 Jun 2015 18:41 #678283 by Mellvis
Replied by Mellvis on topic Tell me I did good!
Not arguing as I don't know all of the science here, but how does the shaft rob more power than a chain drive? Very little gear lash in a shaft drive and lots of slop in a chain drive! Both have rubber drive cushions inside the wheel. Surely the hypoid oil doesn't create that much drag......

Just the facts as I understand them.

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25 Jun 2015 18:58 #678285 by 650ed
Replied by 650ed on topic Tell me I did good!
There's a power loss every time the power rotation changes direction. Unlike sprockets which keep power turning in one direction, this change of direction happens at each end of the drive shaft. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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25 Jun 2015 19:07 #678286 by Mellvis
Replied by Mellvis on topic Tell me I did good!
As I said, I don't understand the science. What causes the power drop at the change of direction? It's constant mesh so how does the power fade at the change in angle?

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25 Jun 2015 20:09 #678290 by SWest
Replied by SWest on topic Tell me I did good!
The transmission and the wheel is turning are the same direction with a chain. With a shaft it has to change directions twice.
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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25 Jun 2015 20:10 #678292 by SWest
Replied by SWest on topic Tell me I did good!
Oh, and you did good. :lol:
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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25 Jun 2015 20:13 #678294 by 650ed
Replied by 650ed on topic Tell me I did good!
There's a lot of info about bevel gear power loss available online, but basically power is lost due to friction between the gear teeth, churning of the lubricant, and side loading on the shafts. From what I've read, losses for systems with 2 gear interfaces range from 5% - 15% . Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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25 Jun 2015 20:16 #678295 by SWest
Replied by SWest on topic Tell me I did good!
That's about right. I was excited when they came out but disappointed when I read that.
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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