Substituting a larger front or smaller rear sprocket lowers the ratio (sometimes called “taller” gearing), resulting in more speed for a given engine rpm. Likewise, a smaller front or larger rear sprocket gives less speed for a given rpm (“shorter” gearing).
Does a smaller sprocket make you go faster?
A bigger rear sprocket/ smaller front sprocket will give you an increase in acceleration but decrease your top speed. A smaller rear sprocket/bigger front sprocket will reduce you acceleration but increase the top speed.
What does a smaller rear sprocket do on a motorcycle?
Gearing a bike up to produce higher top speed with less acceleration is done using a larger countershaft (gearbox) sprocket or a smaller rear sprocket. Gearing a bike down giving it more acceleration with lower top speed is done using a smaller countershaft (gearbox) sprocket or a larger rear sprocket.
What do smaller sprockets do?
You can gear up by using a smaller rear sprocket or a larger countershaft/front sprocket. Gearing up adds more speed and decreases the final drive ratio. You can gear down by using a larger rear sprocket or a smaller front sprocket. Gearing down reduces speed and increases the final drive ratio.
Does a smaller front sprocket give more torque?
Sprocket sizes are a part of the gearing ratios for the bike, as are the wheels and transmission. If the front sprocket is small and the rear is large, you will have more low end power but less top speed. The smaller the front and the larger the rear, the more torque you will have, with a drop in top speed.
What size sprocket do I need?
Sprockets, or “chainwheels” more literally, are measured by their number of teeth. To determine the final drive ratio, divide the rear sprocket size, say 49 teeth, by the front or countershaft sprocket size, say 13 teeth (like a new Yamaha YZ250F).
What does changing your sprocket size do?
The purpose of changing sprocket sizes is to alter the relationship between engine speed on your tachometer and road speed on your speedometer. … Say you want more acceleration and don’t mind making the engine rev higher at highway speeds. Switch to a 17-tooth front sprocket and a 45-tooth rear.
How does sprocket size affect torque?
Changing your rear sprocket won’t give you more mid range or change the engine power curve in any way. It will alter the torque at the rear wheel at all RPMs. The bike should accelerate faster through the gears but you will also loose out on top speed. You don’t need to get dyno tuned just for changing a sprocket.
Is more teeth on a sprocket better?
As a quick rule of thumb, the more teeth on the rear sprocket, the lower the gearing. Conversely, the fewer teeth on the countershaft sprocket, the lower the gearing.
Does more teeth mean more torque?
Thus, the larger the tooth ratio, the greater the torque multiplication, but, of course, the greater the number of turns the driving gear must exert for one turn of the driven gear.
How do you increase the top speed of a motorcycle?
5) Gearing – A motorcycle can be made quicker or much faster by making changes in the gearing of the same. The right combination of front and rear sprocket can help you get the best combination of acceleration and top speed. Changing the number of teeth makes all the difference.
How does changing sprockets affect speedometer?
The speedo drive is taken from the gearbox, so the speedo would be out by the percentage change in the gearing. A front sprocket one tooth bigger and rear sprocket two teeth smaller would give 15.75mph per 1000 rpm, an increase of nearly 13%.
How do you get low end torque on a dirt bike?
One of the fastest ways to gain low-end power is to re-gear the dirt bike. This can be done by swapping out your rear sprocket, front sprocket (a.k.a. counter sprocket) or both to find the proper ratio.
What does adding a tooth to a sprocket do?
Adding teeth to the front and rear sprockets have opposite effects. Installing a larger countershaft sprocket creates higher gearing, while a larger rear sprocket lowers gearing. Similarly, a smaller front sprocket lowers the gearing while a smaller rear sprocket makes the gearing higher.
Is a bigger chainring faster?
A higher/bigger gear will not make you go faster. … (Before going any further, the basics of gearing are that the larger the front chainring, the higher the gear. For the rear, the smaller it is, the higher.)