- 1 How do you increase top end speed on a motorcycle?
- 2 Can you make 125 faster?
- 3 What sprocket is best for speed?
- 4 Is a smaller sprocket faster?
- 5 Can I put a 250 engine in my 125?
- 6 What is the fastest 125cc bike?
- 7 How can I increase my bike torque?
- 8 How do you calculate sprocket speed?
- 9 What will a bigger sprocket do?
- 10 Does changing sprockets affect speedometer?
- 11 Why do BMX have small sprockets?
- 12 How do I choose a sprocket chain?
- 13 How can I speed up my chain drive?
How do you increase top end speed on a motorcycle?
- To increase low end power, you should increase size of rear sprocket or decrease size of front sprocket.
- To increase top speed, you should reduce size of rear sprocket or increase size of front sprocket.
Can you make 125 faster?
Upgrade your front, rear or both sprockets for increased power-band control. Motorcycles with 125cc engines lack top speed compared to larger displacement engines. Purchasing a front sprocket with less teeth than stock and a rear with more teeth than stock can help.
What sprocket is best for speed?
For more bottom end and faster acceleration, use a small countershaft/front sprocket or large rear sprocket. For every 1 tooth that you change on the front sprocket is like changing 3 to 4 teeth on the rear (and that’s true for higher gearing ratios, too).
Is a smaller sprocket faster?
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).
Can I put a 250 engine in my 125?
A modern 250 frame is really not much different than a 125 frame. The frame weights are so close, it wouldnt really even be an issue. You would need to retune the 125 suspension for the added weight of the 250 engine, though. There really is no way to get a 250 cylinder to bolt to a 125 bottom end.
What is the fastest 125cc bike?
Most of the fastest 125cc motorbikes have a top speed of 70mph – very few exceed this speed. The fastest 125cc motorbikes
- Suzuki GSX-R125.
- Yamaha YZF-R125.
- Honda CB125R.
- KTM 125 Duke.
- Kawasaki Ninja 125.
- Aprilia RS 125.
- Yamaha MT-125.
How can I increase my bike torque?
Really the only way is to increase the displacement of the engine, ie increase its cc size by an oversize piston and rebore, or a longer stroke by a different crankshaft, connecting rod and piston. This allows more fuel to be ignited per power stroke, regardless of engine rpm, so increases torque.
How do you calculate sprocket speed?
Formula for Chain Speed Calculation
- Take chain pitch and multiply x two.
- Multiply above number by number of teeth on sprocket of saw.
- Multiply that number by saw RPM. The number you get will be chain speed in inches per minute. To convert to feet divide by 12. To convert to feet per second divide by 720.
What will a bigger sprocket do?
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 gearing higher. For taller gearing, a one-tooth-larger countershaft sprocket is often the best bet.
Does changing sprockets affect speedometer?
changing your gearing and then installing a speedohealer will calibrate your speedometer, but your odometer will now be off.
Why do BMX have small sprockets?
Many BMX bikes use a U-style rear brake mounted to the top of the frame chain stay. With this style of brake mount, a very small sprocket and rear cog will lower the chain so much it contacts the top of the brake and inhibits pedaling. Typically the smallest gear combination a bike of this style will allow is a 36/13.
How do I choose a sprocket chain?
The number of teeth on the large sprocket should be less than 120. Reducing the number of teeth on the small sprocket will reduce the number of teeth on the large sprocket. Two important factors, resistance to wear and resistance to fatigue, should be considered when determining chain size and quality.
How can I speed up my chain drive?
To speed up a drive, you can either make the Driver larger or the Driven smaller. Either is acceptable. Since changes to your pulley sizes proportionately effect the speed, you can easily determine the needed sizes of the new pulleys.