FS FRONT SPROCKER X RS= FRONT SPROCKET ÷ TD = TIRE DIAMETER= SPEED
Originally Posted by Saddletramp1200
With a 66cc & a 38 T sprocket I get about 18 mph. In the bed of a pickup It gets 75 or so.
SO CURRENT IS WRITTEN LIKE THIS
FS 13 X RS 24÷ TD 20 = 15.6 MPH actual speed is 15.5mph which is a .1 losage in mechanical conversion theory.
There are two chains one in the cvt cover and one for to drive the rear tire.
The goal is to not exceed moped laws of 30 mph so I want to be slightly underneath that law.
Initial thought is FS18 X 24÷20 = 21.6MPH - .1 = 21.5 MPH
MY ACTUAL TIRE HEIGHT IS 20 X 1 1/4 GIVEN THEORY IN ADDITION TO LOSSAGE..
upping teeth in the front only would still provide a better gear ratio
Removes that screaming engine feeling, but still provides full power load without to much loss of torque.
19 tooth is as big as the front sprocket can get without customization. So an 18 should do very well toward top speed.
I may also need to rejett as past 3/4 throttle it boggs out. The pikot circuit is fine as it fires the engine first kick everytime have not changed plugs yet but I have cleaned mine and verified it stays a nice coffee brown but runs lean after 3/4 turn meaning main jets to small also plan on removing the redneck gy6 China exhaust and welding on my extra moped muffler which should be a lot quieter on roads without roaring uo the block like a teenager when I have to hit the sidewalks. In town traffic hour.