Sprockets Drive Ratio

[YEN96]

Any experts care to enlighten on the Sprockets Drive Ratio.

 

1. Stock 17/39 ratio 2.294

2. 16/39 ratio 2.4375

3. 17/42 ratio 2.470

 

I know that as the ratio number gets higher, it means more acceleration and the bike has more torque. Also it push the RPM up ( stock at 100km/h at 4000rpm, after change 100km/h at 4250rpm )

 

Question here is a -1 Front roughly equals a +3 Rear. So wat is the difference between 16/39 and 17/42. I guess a 42R will give a longer chain so can last longer ?? Also due to a smaller 16 F, its more strain/wear& tear on the chain/sprocket due to the smaller radius of turn.

 

Also, if i alter the ratio by a +6% change, does it equate 6% error in speed?

So now my 100km/h is actually more or less ?

 

Experts pls ............

1. wat the diff between -1F and using a +3R

2. 100km/h now with a +6% ratio is actually more or less

[Orleng]

try out this page, has everything nicely set out for you to key in n compute, also some neat explanation, click around on the help links next to the related fields. taught me abit.

 

http://www.gearingcommander.com/

 

if you look under help and info > help on > chain geometry > front vs rear, that should give you what you're looking for?

 

also tells you same tooth - same link, etc, so how much faster might the chain wear, etc.

Edited May 16, 2009 by Orleng