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Ok due too the fact that I was givin the wrong info by the guy that I bought the bike from , I purchased and installed a set of renthal sprockets 14/45 . Worried that that set up will be to much for the bike here are my options on gearing. 15/43, 15/45, 14/43, or 14/45 ? The initial setup was 15/43 which the original owner said was a stock setup , I didn't think that it was enough low end grunt so I wanted a -1/+2 setup and opted for the 14/45 renthals , then I came to realize that 15/40 is the factory setup. Do some zx6r' s come with the 15/43 setup cause i could have sworn that in my earlier searches I seen those numbers ?? If anyone has any of these setups it would be great to hear some feed back .
 

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the 05-06 636 and 05-06 zx6rr came stock with 15-43 gearing, if u want to go -1 +2 from stock u will need 14-42 gearing
 

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05-06 might make it's power higher in the rev range, it might have a different primary drive ratio, maybe even different gear ratios. Comparing the 05-06 stock 15/43 to the '01 15/40 isn't comparing apples to apples.

So don't comapre the 05/06 ratio with your 01.
 

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Yeah my 06 doesn't really hit powerband until a bit above 7k. It'll still pull off the line in 3rd gear though, but it really doesn't like it much.

I'd say go 14/45. Either way that'll give you plenty of torque, and you wont be sacrificing too much of your top end.
 

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Discussion Starter #6
Thanks for some of the help but , I don't think anyone of you actually read my post cause your not makin sense .
 

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14-45 is going to have some crazy low end power but if u ride the freeway alot u might not like the revs being so high and your going to loose some of your top end speed, me personally i wouldnt go no more than -1 +2 if u are going to be doing alot of long distance trips, if its going to be a track only bike i could see more gearing
 

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im sort of in the same boat as you i was told buy a work shop that because my bike was made 10/04 i had 2005 gearing so iv gone out and brought 14/45 renthals now after scrubing the crap out of every thing i find out that it is 15/40 but i havent put them on yet so i dont know how there really going to go but i do ride a lot of ranges and steep mountins so for me i think ill be fine but as said befor if your doing hiway stuff it will probbly be st short so maybe go the 14/43 just to give it a bit more poke jmo
 

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blah blah blah......

the factory gearing is 15/40. which will give a theoretical top speed of 186mph

use a 14/42 set-up. this will give a top speed of 165mph, which if tuned properly it will be capable of. (this is REAL speed, not INDICATED numbers i'm talking about)

this -1/+2 (14/42) set-up will be similar to changing your 5th gear to your 6th gear and simply adding a new lower 1st gear. (if that makes sense the way i said it.lol)

stock, your bike might do about 150-155mph. but, with a -1/+2 set-up you will now do about 160-165mph. (assuming both runs are in 6th gear)
 

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.........

this -1/+2 (14/42) set-up will be similar to changing your 5th gear to your 6th gear and simply adding a new lower 1st gear. (if that makes sense the way i said it.lol)

stock, your bike might do about 150-155mph. but, with a -1/+2 set-up you will now do about 160-165mph. (assuming both runs are in 6th gear)
If that's the case:

Why can't he do 160-165mph in 5th now then :dowhat
 

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i like the question.

I never said he couldn't, in fact, the implication would be that he could. And as a matter of fact, he should be able to.

thing is though, most of us dont run it out in 5th, it is just natural to up shift to 6th.

if a person wants better MPG on the highway, then stock gearing is good, and top speed runs could be done in 5th. (perhaps shift to 6th once top speed is reached to attempt to cruise at such speed)

If a person wants the same or better top speed potential AND a harder launch off the line then modifying the final drive ratio would be necessary. for J models, i know that -1/+2 is great all-around, or -1/+3 if you want a bit more in 1st, and still want to be able to run 150-155mph

there is a gearing chart on this forum that you can use to calculate your speeds with different gearing choices.
 

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the owners manual should have your final drive gear ratio in it... having said that i'd have thought 1 down on the front would have given a good boost
 

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Dl this and have a graphic to explain it for you.
http://static.ninja6zone.com/filevault/gearing_v12.xls

Its all fairly simple i reckon.
15/40 is a final drive of 2.67 (40 divided by 15 = 2.67)

2.67 is the final drive number. The lower this nimber is the longer the gearing and the higher the top speed (in theory)
So it stands that the higher this number is the shorter the gearing and a lower top speed.

Also it pays to remember a larger fr sprox will give more snap to the acceleration.
 

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i have a zx6r 98. I'm wondering if i go -1 front and stock at rear how much of a difference it would make on track for drag race like 1/4 mile. I know i'm loosing top speed but i'd like to know if it worth the change on drag race and torque versus top speed lost and more lost of fuel economi. Anyone tried it before? Or even similar to this.
 
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