Centrifugal Clutch Motors

I only have one c-clutch bike. Last season I rode the bike quite a bit. The c-clutch did not come into play much. I could not make the engine idle low enough to disengage and still be dependable.
This winter I removed some mass from the weights. It now performs like it should. Takes off well and disengages when I slow for a stop.(similar to a std. mini bike). I do not have to peddal.

My bike is a 26" Scwhinn Delmar cruiser with rear side baskets,tank is on rear rack.
I have a 48cc Starfire gt2 grubee with pullstart and centrifugal clutch (gasbike).
My bike takes off from a stop like a rocket and does not need any help.
The top speed so far is around 31.7mph @ around 180mpg (my idle is set low).
I am running a stock black cat muffler (holes inside were enlarged a little).
Air filter is old model; round gold and white open with filter.
I weigh 120lbs so if you weigh a lot more you might have to peddal a little to get going.
My engine still starts with the first pull.
I have around 1,000 miles on it.

44t sprocket with 410 heavyduty bmx chain on engine and peddal sides.

Which gear on the wheel,40,36,50?

Im using a 44t sprocket.

I need to get the conversion for my BGF,guess better put it on a bike and make it run first lol

mine just came in. i saw a drain screw on the clutch side. any help or advice to what its for?