22-02-15, 12:25 AM
We'll have to agree to disagree on the technicalities Ian, everything I've done in engineering and maths over the last 40 years has backed up thee simple fact that changing the sprockets (smaller front/larger rear) simply changes the overall drive ratio, increasing RPM's in each gear for any given road speed. Because the engine is spinning higher for a given road speed, more power and torque is available at that speed - hence, the bike is much more responsive and accelerates faster, per gear.
BUT, the exact same effect can be had by simply riding along in one gear lower than you do now - the gearing computations others have provided links to from other posts prove this, beyond a shadow of a doubt.
I'm not saying don't change the sprockets, I'm just pointing out that if you always match your desired RPM's to your desired road speed, you generally don't need to change sprockets - and being a tight-arse, I'd rather keep the money for the sprockets in my pocket and just use a lower gear to keep the revs up when hooning about, to get the response I like.
BUT, the exact same effect can be had by simply riding along in one gear lower than you do now - the gearing computations others have provided links to from other posts prove this, beyond a shadow of a doubt.
I'm not saying don't change the sprockets, I'm just pointing out that if you always match your desired RPM's to your desired road speed, you generally don't need to change sprockets - and being a tight-arse, I'd rather keep the money for the sprockets in my pocket and just use a lower gear to keep the revs up when hooning about, to get the response I like.