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post #1 of 11 Old 08-31-2005, 7:21 PM Thread Starter
 
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quick sprocket question

Is it possible to increase acceleration and maintain top speed? I'm 99% sure it's not if you're redline limited and all you change is sprockets. I ask b/c my friend w/ an '05 gixxer 750 just bought some sprocket kit off ebay that includes a front and rear sprocket and it claims no effect on top speed. I asked but he didn't know how many teeth they are. I know going down in front or up in the rear increases accel at the cost of top speed but is this kit just full of crap or what?
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post #2 of 11 Old 08-31-2005, 7:35 PM
 
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Re: quick sprocket question

Where are you riding that you'll be able to hit 165 regularly, where a 3 mph loss might be noticed? You can increase accel and maintain (or increase) top speed if you can't pull redline in top gear with the current gearing.
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post #3 of 11 Old 08-31-2005, 8:01 PM Thread Starter
 
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Re: quick sprocket question

Quote:
Originally Posted by RRWANTR
Where are you riding that you'll be able to hit 165 regularly, where a 3 mph loss might be noticed? You can increase accel and maintain (or increase) top speed if you can't pull redline in top gear with the current gearing.
I could give a crap about top speed which is why I went down a tooth up front. I'm asking b/c I'm curious if it's possible or not. I geuss I don't know if his 750 is redline or drag limited at top speed.
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post #4 of 11 Old 09-01-2005, 4:44 AM
 
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Re: quick sprocket question

most bikes dont redline at top speed, therefore if you reduce gearing you might even go faster cos you have a little more power (the power might not be dropping away and thus limiting your top speed)

Bukes are a compromise of useful speed, accel and ridability. My bike is faster top end on a +1 at the rear than as standard as the power curve suits the gearing. However leaving the rear at +1 and making the front -1 causes me to redline (well I would if I had not moved the redline by going the wiring mod to the ECU).

Jon
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post #5 of 11 Old 09-01-2005, 7:09 AM Thread Starter
 
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Re: quick sprocket question

this is off subject but what can I do about my speedo being off since I'm down a tooth up front? Is there a simple solution I can buy for a decent price to make it accurate? I'm getting sick of doing the 10% slower calculation in my head all the time while I'm driving.
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post #6 of 11 Old 09-01-2005, 7:14 AM
 
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Re: quick sprocket question

I don't have a link but do a search on here about the speedohealer...that should help
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post #7 of 11 Old 09-01-2005, 7:28 AM Thread Starter
 
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Re: quick sprocket question

Beat me to it...I just did a search and I actually just ordered the speedohealer. Now I just wish I would've done it a couple thousand miles ago!
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post #8 of 11 Old 09-07-2005, 10:21 AM
 
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Re: quick sprocket question

I added one tooth to the rear and my speedo is still disturbingly accurate according to my gps thingy (and a gearing / engine rev check) its like a couple of percent out....

Weird. Usually I tape over it and dont stop for anything blue and flashy.
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post #9 of 11 Old 09-07-2005, 12:06 PM Thread Starter
 
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Re: quick sprocket question

I went down a tooth up front and I can tell the speedo reads higher than it should. What do our bikes top out at anyways w/ stock gearing? I saw 168 (indicated) at 10,200 rpms on my current gearing which means I was probably only going around 150 - 155.
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post #10 of 11 Old 09-07-2005, 12:11 PM
 
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Re: quick sprocket question

My 1000rr will smack the limiter in 6th with one tooth down in the front, whereas it wouldn't quite pull redline in 6th with the stock gearing. I suspect my top speed might be a bit higher.

Here's another wrench in the gears though... I live at about 3000ft above sea level, and I'm convinced that at sea level, with stock gearing, I could pull redline in 6th.

Doesn't matter much to me, just a point of curiosity. Anything over 150MPH is wickedly fast and I'll very rarely have it that high.

edited for typo

And then there's this asshole...

Last edited by phobiaphobe; 09-07-2005 at 12:21 PM.
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post #11 of 11 Old 09-07-2005, 9:42 PM
 
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Re: quick sprocket question

Well my 900rr would hit the redline at 11k in top gear at 185 or so with stock gearing I just went from stock 16t to a 17t and the bike stops pulling at 172 indicated and 10.2k or so. I guess I will dig out the GPS so I can sort some things out. Hey Phobiaphobe I know what you mean 150mph is fast but I work overnight and the freeway is empty when I am heading to work so 150+ is a commom thing for me lol.
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