Gen 4: 2011-2015 Zx-10r Sprocket question - Kawasaki ZX-10R.net
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post #1 of 10 Old 01-08-2018, 02:36 PM Thread Starter
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Zx-10r Sprocket question

Hello folks

So i use my gen4 lately just on my local track which is pretty small and can be considered a "go-kart track"

the bike is currently geared @ 17/47, pretty good for the track but i wish there was abit more low end torque

would 17/49 damage the bike in any way ? Most liter bikes use first, second and third gear only on this track since its quite small with lots of tight corners

so ye my main question here is actually if too big of a sprocket setup could hurt the bike (don't care about chain wear and sprocket since i change those out often)
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post #2 of 10 Old 01-08-2018, 02:42 PM
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Just put a 16T on the front...
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post #3 of 10 Old 01-08-2018, 03:09 PM
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Vortex makes 15T for oem 525 chain. Try 15/47, it may help use 1st gear less.
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Gen4 race: high spec.
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post #4 of 10 Old 01-08-2018, 05:23 PM Thread Starter
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Quote:
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Vortex makes 15T for oem 525 chain. Try 15/47, it may help use 1st gear less.
sounds interesting

is there a difference actually by changing front vs rear ? i know that -1 front equals around +3 in the rear but i also heard that going down front gives better lowend torque while upping rear gives better mid/high torque. not sure if it's true
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post #5 of 10 Old 01-08-2018, 05:36 PM
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sounds interesting

is there a difference actually by changing front vs rear ? i know that -1 front equals around +3 in the rear but i also heard that going down front gives better lowend torque while upping rear gives better mid/high torque. not sure if it's true
Anytime you can take weight off the driveline youre better off. Going down a size in the front would be better. Going up in the rear adds size and weight...

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post #6 of 10 Old 01-08-2018, 05:54 PM
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Try this sprocket calculator:

Sprocket Calculator - the easy motorcycle sprocket and chain calculator

You will see what 17 and rear matches 16 and rear.
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post #7 of 10 Old 01-08-2018, 07:53 PM
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Quote:
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i also heard that going down front gives better lowend torque while upping rear gives better mid/high torque. not sure if it's true
I'm not aware of such theory.
In practice "final drive ratio" (R divided by F) is what affects torque, rpms, speed.
Sprocket changes affect a bit handling of the bike too (wheelbase and swingarm squat).
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post #8 of 10 Old 01-08-2018, 08:23 PM
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Quote:
Originally Posted by Carlos76 View Post
I'm not aware of such theory.
In practice "final drive ratio" (R divided by F) is what affects torque, rpms, speed.
Sprocket changes affect a bit handling of the bike too (wheelbase and swingarm squat).
I was totally not going to go there, but I am amused you did

Anyone that has to post up questions on a forum about final drive gearing already has no understanding of acceleration rate vs elapsed time nor the mathematics that derive hp and torque let alone gyroscopic precession or the swingarm downslope augmentation by changing the angle from the CS to the Rear Sprocket. For a fleeting moment I almost posted up an addendum (no pun intended) to my original post, but thought better of it. I'm only posting this now because I am imbibing Bombay Sapphire and the whole thing made me giggle a bit. Obviously alcohol killed the weakest brain cells I had and made me smarter for a few minutes.

Now here is a pic of my cat El Bandito
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post #9 of 10 Old 01-08-2018, 09:51 PM
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Quote:
Originally Posted by wowjudo View Post
sounds interesting

is there a difference actually by changing front vs rear ? i know that -1 front equals around +3 in the rear but i also heard that going down front gives better lowend torque while upping rear gives better mid/high torque. not sure if it's true
It's a gear ratio, not magic.
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post #10 of 10 Old 01-09-2018, 11:09 AM
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I was totally not going to go there, but I am amused you did
That young man may figure it out and test on track.
Our and ElBandido's old brains and bladders run on autopilot anyway.
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Gen4 race: high spec.
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