How To Increase Speed With Sprockets?

Does every rider desire to travel faster and if you’ll realize some additional power or high speed in your existing bike; that too while not spending a lot of cash, who wouldn’t need it? The solution to add power or additional high speed is a chain/sprocket kit. You can get exact share gain that you just can calculate before modification. But How To Increase Speed With Sprockets?

Increase Speed With Sprockets

Step By Step Guide For How To Increase Speed With Sprockets?

If you’re looking for the relation between sprocket and acceleration/speed and don’t need to dive into the main points here it’s for you:

  • A bigger rear sprocket/ smaller front sprocket can offer you a rise in acceleration but decrease your high speed.
  • A smaller rear sprocket/bigger front sprocket can cut back your acceleration however increase the highest speed. It is as easy as that. No guesswork. currently, let’s scrutinize the Sprockets:

There are numerous choices on the market within the market right from aftermarket EU (for motorcycles having fuel injection), larger carburetors to air filters, and whatnot. All claim to produce loads and lots of power with no penalty in fuel economy or the other penalty.

Nowadays we would like to require a glance at one such mod which will deliver what you would like. No guesswork about what proportion you’d gain. it’s easy arithmetic.

What Are Sprockets?

Let us initial understand some basics regarding what sprockets are. A sprocket could be a toothed wheel whose teeth engage with the links of a sequence. Any motorbike with a sequence drive system has 2 sprockets and a chain connecting each of the sprockets. The smaller ones at the front are termed the “Driver” whereas the larger ones at the rear wheel toothed wheel the “Driven” sprocket.

The transmission output shaft is the one that connects to the front sprocket (driver) and makes it rotate. The front sprocket transfers the facility to the rear wheel via chain and rear sprocket. Thus, essentially these 2 sprockets outline the way the power of the engine is transferred to the rear wheel.

What Gain Am I Talking About?

The two sprockets offer an amazing chance to improve either acceleration or increase high speed. By the laws of physics, increasing either one of these 2 variables can cause a decrease within the alternative (more on this later).


Altering the gear ratio of a motorbike by modifying the sprocket is understood as Sprocketing. now however would you recognize what proportion you’ll be able to gain by doing any change? it’s simply a formula.

Sprocketing Theory

Just to form it simply, let’s take into account a motorcycle that has one tooth within the front sprocket and 2 teeth within the rear sprocket. Since the 2 sprockets are connected by a series, thus for every rotation of the rear sprocket the front sprocket makes a pair of rotations. (Another way to place this can be for one rotation of the front sprocket, the rear makes half a rotation).

Let’s say I need to increase the acceleration. I will either increase the scale of the rear sprocket or cut back the scale of the front sprocket. Let’s say we decided to extend the no of teeth in the rear by a pair of (from 2 teeth to four teeth).

After the modification, for every rotation of the rear sprocket, the front makes four rotations (as compared to 2 rotations of stock setup). The opposite way round it’d mean that one rotation before the sprocket can cause the rear sprocket to form 1/4=0.25 rotations. currently, however, will it probably cause an increase in acceleration?

Because of the increase in the variety of teeth of the rear sprocket, the overall diameter of the rear sprocket has increased. Because the chain fits on edge of the sprockets, the length from the middle of the rear sprocket (center of rear wheel axle) to the sting of the rear sprocket would increase (how a lot of the increase depends on the increase in the variety of teeth).

Because of the increase long, the leverage that it’d get would increase proportionately. you must have seen truck drivers exploit long levers to get rid of bolts from the wheels of their trucks. Why? to extend the torque they will apply. a similar principle applies here.

The second impact of this mod – as the rear sprocket is mounted on the wheel, this means that the rear wheel is additionally making (0.5-0.25 =) 0.25 lesser rotations once the modification. It additionally means that the top speed in every gear can be the top.

Tips For Sprockets

It is sometimes suggested to tweak the rear sprocket rather than the front sprocket. There are 2 reasons for this:

  • Reducing the number of teeth before the sprocket can cause the chain to turn round the sprocket at a tighter radius that in turn can increase friction and cause a lot of wear & tear.
  • As the rear sprocket is larger (has a lot of teeth), changes in the rear sprocket allow for a far finer adjustment as compared to the front.

Points To Remember While Sprocketing

  • To increase low-end power, you ought to increase the size of the rear sprocket or decrease the size of the front sprocket.
  • To increase high speed, you ought to reduce the size of the rear sprocket or increase the size of the front sprocket.
  • Before you opt to extend the high speed of the bike, understand whether or not your bike’s engine is capable of generating decent torque to form use of the taller gearing.
  • The pitch of the sprocket must always be the same once sprockets.

Parts Of Sprockets

Sprockets are generally made up of steel or aluminum. Steel sprockets are typically less expensive, and higher for longevity. the simplest steel sprockets use hardened and heat-treated steel. Sprockets made of aluminum are considerably lighter, however, have a shorter life span, and are more expensive than steel.

  • Pitch: Pitch is the distance between the holes at a chain ends of a chain link. the distance between the dotted lines within the below figure is the pitch
  • Outer plate: The diameter of the holes on the outer plate is smaller as compared to the inner plate
  • Pin: Pin is the cylindrical structure between 2 outer plates of the chain.
  • Bush: Bush encloses the pin inside itself and is mounted on the inner plates.
  • Roller: Roller is mounted on top of the bush and rotates freely.

Calculating The Exact Modification By Would Get By Sprocketing

Multiply the number of teeth you would like to feature/scale back by one hundred and divide by the present number of teeth. If this is often too simple for you, there may be a bit additional careful calculation

Rear Sprocket Modification Formula

% Change in torque = {one hundred * (No of teeth additional or reduced)} / (No of teeth in rear sprocket available configuration)

% Change in Speed = {100 * (No of teeth additional or reduced)} / (No of teeth in rear sprocket in new configuration)

Front Sprocket Modification Formula

% Change in torque = {one hundred * (No of teeth additional or reduced)} / (No of teeth before sprocket in new configuration)

% Change in Speed = {100 * (No of teeth additional or reduced)} / (No of teeth before sprocket available configuration)


I hope this article is helpful for you whenever you think, How To Increase Speed With Sprockets? For top finish and quicker high speed, use a large countershaft/front sprocket or the smaller rear sprocket. This creates a taller gearing ratio that is best for top-speed things while not end tight turns like wide-open desert sport.

Frequently Asked Questions

Does a smaller sprocket provide additional speed?

Substituting a Bigger front or smaller rear sprocket lowers the ratio (sometimes called “taller” gearing), leading to additional speed for a given engine rpm. Likewise, a smaller front or larger rear sprocket offers less speed for a given rate (“shorter” gearing).

Does a bigger sprocket provide additional power?

You won’t increase the power output of the engine by changing the sprockets however may reduce losses within the drive train so increasing the facility at the wheel.

What does additional teeth on a sprocket mean?

The two sprockets are measured by their variety of teeth. As a fast rule of thumb, the additional teeth on the rear sprocket, the lower the geartrain. Conversely, the fewer teeth on the countershaft sprocket, the lower the gearing.

What will a sprocket change do?

The purpose of adjusting sprocket sizes is to change the link between engine speed on your tachometer and road speed on your speedometer.

Leave a Comment