Hi Storekeeper,
Something is confusing in the numbers.
If the primary is 5 X 1 and the rear sprocket is a 44, and the output sprocket is an 11, the final ratio is 20 X 1.
Divide 11 into 44 and you get 4 X 1, then multiply by the primary ratio of 5 X 1 for the final 20 X 1 ratio.
We supply the EZM kit with the Q-Matic drive with a stock 15.48 X 1 ratio. The majority of EZM kit owners are in the 200 to 250 pound range, and no reports of pedal assisted take-off is needed [39 MPH @ redline].
If you change the rear sprocket to a 56 tooth on your current setup the final ratio would be 25.45 X 1 and surley will climb most hills, however it is important to note a few numbers. At 25.45 X 1 your motor will be turning numbers that will limit the top speed to 23 MPH [at redline of 7800], and if ridden to 30 MPH [10,000 RPM]it will most likely supply you with lots of little parts that once was a motor.
The 4 stroke motor is difficult to determine the RPM level because it is so smooth and quite, and is easily over revved. While the 49 CC 4-stroke is a great motor, it can not stand running at 10,000 RPMs for an extended length of time [BTW your car motor would also become scrap if run above 10,000 RPMs]
If you elect to increase the rear sprocket size for better take off, be VERY careful, and it might be wise to install a tachometer.
It is almost impossible to break the little 49 CC 4 stroke, but it can be done with radical ratios.
Hope this information is helpful, and any comments concerning the EZM Q-Matic drive is for information purposes only, and not for advertizing our product.
Have fun,