200cc Gear ratio speed

[kksbunny]

i just made my home made motorized bicycle, it has predator 212 cc with governor.
my clutch has 13 tooth
input jack shaft 22
output jack shaft 10
sprocket 56


how do i calculate my max speed at 3600rpm?

Thank YOu.

 

[magna_503]

MS = 3600 / ((22/13) * (56/10)) * .0798 provided that you have a 26" x 2" tires.

that came out to around 30mph +/- 2mph.

 

[MotorBicycleRacing]

Why are you leaving the governor on?

gear ratio calculator from motoredbikes.com

The program can be downloaded from http://jimsitton.net/ratiocalc/

Just right click on the file gearratio.exe and select "save link as" and put it somewhere you can find it again.

Once it's saved, double click on the gearratio.exe file and it will run.

The program allows for up to three ratios in series. If you have fewer just leave the unused ratios set to 1:1.

The program will also calculate speed based on engine RPM, drive ratio,and wheel diameter. Be sure to measure the outside diameter of your wheel for accurate results.

 

[scotto-]

Using the gear ratio calculator, here's what you have:



You really do need to remove the governor and gear lower to take advantage of the set-up you are using.......better power and plenty of it!

 

[kksbunny]

Thanks a Lot u guys, should i chain the sprocket from 56 to 44?

 

[scotto-]

Thanks a Lot u guys, should i chain the sprocket from 56 to 44?

Absolutely not, you should change the 22 to a 28 if possible. And remove the governor and low oil sensor. That will make a world of difference.