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Discussion Starter #1
I don't want to change the front sprocket, just the rear.

I want more low to mid-range torque.

Would you recommend dropping one tooth in the rear or go ahead and drop 2 teeth?

Also, how will my top end be affected by a 2 teeth drop in the back?

The bike is a Y2K Kat 750.

Thanks,

Blake
 

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Generally if you want to increase low end acceleration and quickness you can drop one tooth in the front or add 1 or two in the rear.
 

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you want to add teeth to the back or remove from the front to increase acceleration.

removing teeth from the back will make the bike accelerate slower and have a higer top end(If the motor can pull the gearing on the top end) and a lower cruising RPM.
 

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1 tooth in front is approximately equal to going up 3 teeth in the rear (2.7 I think).

Shane
 

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Going up 2 in the rear is recommended because it causes less chain wear but keep this in mind if you go too big in the back wheel base is affected and a longer chain may be required. just my .02
 

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I geared my Tona pretty radical, and I'm quite happy with the results.

I went from 18:42 to 17:45, the change was night and day. I now have a very usable powerband, and a pretty decent topend.
Granted I did lose prolly 20mph off my topend, But the bike will still do 135+ (GPS'd) and screams all the way up to redline in every gear...

One thing to note was that adding the rear teeth did require me to lengthen the chain.
:creep
 

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I had a katana with a 50 tooth sprocket on the rear (up from a 47). I can't recall if I had a 14 or 15 on the front. Whatever it was it was down 1 from stock. It made a noticeable difference but sucked for highway riding.
 

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I have been thinking of going down one tooth in the front also but now i think going up 2 in the rear might be what i should do. This all depends on if i am thinking right in that a rear sprocket size change wont bother the speedo like it does on the front sprocket. I could care less about loosing top speed. How often do i really do 160.
 

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thanks for the info.. it is time for new sprockets and a chain. I guess ill be getting one of those black robotic spedo recalculators then
 

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Oh I know where to get it and i have the info on the group buy already. I have been putting the chain and sprockets off all summer. Its starting to get a little chilly here so i guess ill be doing it soon.
 

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I have played with sprockets all my life, and the best sprockets is the one that suits your riding style.

When Im riding with my girl-friend I go 17-41 when I go wit the guys I go 16-43. Diferent aproach to the riding Im going to do.

If you whant mode midange pull, you have to increase the power of the engine. Sprockets only increase or decrease acceleration.
 

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how does changing the sprocket affect your speedo?

i know on the ZX7R teh speedo is a cable that is attached to the front wheel i know mine backs off all teh time and i lose all speed indication and odometer readings.

is yours attached to the transmission????:confused
 

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Divide the Front / rear
Ex. 15/43 you will get a number then you do the same math to the other numbers and calculate the diference.

That is the diference in %.

Dont worry, most of the speedo are very inacurate so you will never know unles GPS or radar.

ZX7r comes from the front weell so the speedo is not afected with sprocket changes.
 
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