countersteer
Needs a job
Didn't read the owners manual
Posts: 2207
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posted June 30, 2008 10:51 AM
Countersprocket RPM?
a countersprocket became a topic of discussion earlier, and my friend was a bit amazed that such a little piece of metal was responsible for putting down so much power and speed. i am wondering, what RPM would a 17T spin @ maybe 10K rpm?
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Scott
Long Island, New York
2006 ZX-14, 2003 ZX-12R
   
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johnnycheese
Pro
Posts: 1008
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posted June 30, 2008 02:35 PM
what gear and what reart sproket
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Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
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countersteer
Needs a job
Didn't read the owners manual
Posts: 2207
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posted June 30, 2008 04:43 PM
rear sprocket wouldnt dictate how fast the countersprocket would spin, would it? lets say first gear.
thanks
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Scott
Long Island, New York
2006 ZX-14, 2003 ZX-12R
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KZScott
Needs a life
high on speed
Posts: 7235
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posted June 30, 2008 06:04 PM
it would spin faster in 6th
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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aliveagain
Needs a life
Posts: 5033
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posted June 30, 2008 06:33 PM
quote:
it would spin faster in 6th
I'ld have to disagree with that.The front sprocket can only go as fast as the motor turns.Red line is the same no matter what gear.If anything, because of the speed limiter, 6th gear would be the slowest.
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I wondered why the baseball kept getting bigger. Then it hit me.
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ninja12
Needs a job
Posts: 3310
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posted June 30, 2008 07:13 PM
Not exactly right.
the front -rear sprocket establish a ratio, But the Transmission dictates the speed of the front sprocket in relation to the engine speed. 17/42 gears is a 2.47 ratio meaning
ever time the front sprocket turns over 2.47 time the rear sprocket turns once.
The transmission has different ratio for each gear.
for understanding purpose only 1st gear 6to1 , 2nd 5to1, 3rd gear 4 to 1.... 6th gear 1 to 1.
in first gear the engine has to turn 6 times to make the front sprocket turn ones,
but the front sprocket still has to turn 2.47 times to make the rear wheel turn once.
meaning the engine has to turn 6*2.47 (14.82) revolutions to make the tire trun over 1 complete revelotion. using the example numbers , in 6th gear 1 engine turn would result in 1 sprocket turn , still 2.47 front sprocket turns to make 1 rear turn. 1*2.47(2.47 ) engine revolutions per rear wheel revolution. the higher gears make the front sprocket turn faster at the same RPM. The bike is RPM limited in 6th gear.
going up on the front sprocket , down on the rear or a larger rear tire will increase the true speed before the limiter kicks in. IF YOU HAVE THE HP to use them.
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KZScott
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high on speed
Posts: 7235
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posted June 30, 2008 07:17 PM
 Edited By: KZScott on 30 Jun 2008 20:19
edit: typed in respose to AA not ninja12 (nice math btw  )
so you are saying that the front sprocket turns faster in first?
since its directly linked to the rear sprocket, and the rear sprocket is connected to the wheel, and the wheel turns faster in higher gears, how is it possible for the front sprocket to be moving slower in high gear?
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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zrexpilot
Expert Class
Posts: 470
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posted June 30, 2008 07:35 PM
front turns faster in sixth, basically one to one ratio so it would be spinning the exact rpm the motor is spinning, in 6th gear. say 1st gear is a 6-1 ratio, it would be spinning 1/6 of engine rpm in 1st gear.
ninja 12 explained it pretty good.
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aliveagain
Needs a life
Posts: 5033
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posted July 01, 2008 03:30 AM
What the hell was I thinking? Sorry guys ,you're right! LOL,I just woke up and that was the first thing on my mind.I was going to edit my post but looks like it's too late. 
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I wondered why the baseball kept getting bigger. Then it hit me.
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entropy
Moderator
Posts: 8671
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posted July 01, 2008 03:45 AM
quote:
What the hell was I thinking? Sorry guys ,you're right! LOL,I just woke up and that was the first thing on my mind.I was going to edit my post but looks like it's too late.
Pete,
tell me what tyou want done and i'll fix it
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This moderator uses moderation in moderation
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KZScott
Needs a life
high on speed
Posts: 7235
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posted July 01, 2008 07:37 AM
delete the last 3/4 of the thread Karl lol
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
countersteer
Needs a job
Didn't read the owners manual
Posts: 2207
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posted July 01, 2008 07:52 PM
thanks for the replies 
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Scott
Long Island, New York
2006 ZX-14, 2003 ZX-12R
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