Difference front sprocket teeth number makes?

Dutch2011

Registered
Hi all,

I am new to the forum and have just come back to biking after 22 yrs off, I am now 55. I went from bikes to fast boats to cars etc. They never really did it for me like bikes though.
I have started back with a Zzr600, I think it was a zx 600 in the States, just to get going again.
In the long run I want a Hayabusa. I would like to do some drag stuff, nothing serious just Santa pod and Elvington.
Anyways, I have always been into stats on bikes, top speed, 0 to 60, how quick could i do a journey. That was yrs ago though, before the roads became full like that are now.
So coming back to biking there are brilliant resources on the internet with all sorts of geeky facts. The one thing I cant find, is how much quicker/ slower time wise one tooth down and one tooth up would make a 0 to 60 or a quarter mile run.
I know how much speed an extra tooth down and up gives theoretically, but I would really love to know timings. I know this will depend on lots of factors.
But theoretically is there an equation or some way of working out what the 0 to 60 and quarter mile times increase and decrease would be if standard teeth was 16 doing, 0 to 60 in 3.4 secs and quarter mile in 11.2 secs.
So 15 teeth = how many tenths quicker, if at all and 17 = how many tenths slower if at all?
I am not after variations of tyres, surface, weight of rider etc just the pure theoretical numbers in tenths of secs, if indeed a conversion even exists.
Thanks in advance.
 
I'm sure there's a mathematical way to figure this out but it would have to include very specific information about the bikes hp/tq curve, launch rpm, shift rpm, shift speed, number of shifts, time, distance and who knows what else. If calculations are meaningful only if expressed in increments as small as tenths of a second, that's going to be one heck of a formula. As you imply, the calculation probably wouldn't be highly reliable when applied to real world drag racing.

Gearing Commander will tell you top speed but even that is only a close estimate.

 
I was watching some cerebral YouTube today. The guy had lowered his rear gear, which required an additional shift at the end of the quarter, which actually slowed him down. Pretty wild.

If drags are your thing, I say give it a try. It's a simple / inexpensive change. Got to be one of the best bang for the buck mods.

I went the other way on mine. She came with a small front sprocket and I wanted lower highway revs.

Show us your bike!
 
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