Many people alter the stock performance of the bike and, if someone prefers acceleration, someone or top speed, again everyone like me, whether it is a stock engine, or a modified engine, if you want to differentiate this acceleration and top speed, you Of course something has to change at Sprocket. I will show how it changes the speed and acceleration of the bike. We haven't seen stock sprocket bikes before.
Bajaj Pulsar 150 UG 4 = 15/44 = .340
Yamaha FZS = 14/40 = .350
Apache RTR = 13/44 = .325
Etc.
Note that the lower the final drive ratio, the higher the acceleration (RTR), and the higher the ratio (FZS), the lower the acceleration, but the higher the speed. (However, the main transmission, three types of three bikes, so the comparison here is absurd, just for the convenience of understanding)
I will only discuss the Pulsar 150 (UG 4) for ease of understanding, but the principal is the same for all bikes.
There are stocks = 15 front and 44 back.
15/44 = .340
Now if I want to over-gear, I put a 39-tooth sprocket on the back of the Pulsar 160.
Now setup = 15/39 = .384
Since we have over gear, the top speed will increase, but the acceleration will decrease. We can easily find out how much the top speed will increase.
Suppose stock at 9000 RPM (5th gear) speed 110 km / h (Figure 2)
After installing the 39 tooth sprocket, we are seeing a difference in the ratio
.364 / .340 - (1) = .129 or .13. So I get 13% more speed.
So now at 9000 RPM in stock (5th gear) with 39 tooth sprocket my top speed will be 13% higher or 110 + 13% = 110 + 14 = 124 km / h.
If I had 42 teeth of Discovery 125,
15/42 = .356
So, let's see what percentage will increase the speed.
Divide the stock by .358 to .340, then, 356 / .340 = 1.05 Now if we subtract 1, we get%. Then there is 05% or 5%.
So the top speed will be -
110 + 5% = 110 +5.5 = 115.5 km / h.
Again, if I have not completely changed the front and rear sets, we will try the Pulsar 220 set 14/36.
So, 14/36 = .38
So the top speed will increase
.38 / .340 (stock) = 1.11 or 11% increase.
This way you can calculate before changing the sprocket of your bike. Note that if you over-gear, the acceleration will decrease and the speed will increase with the pen on the over-gearing paper, but in real life it can be reversed. Engine power, wind resistance etc. are very important for achieving top speed.