New Guy in MidWest

Welcome, glad you joined us.

What kind of engine kit do you have?

The clutch in alot of these engines will seize up from sitting in storage for months on end. This is the most common problem with clutches on brand new engines.
It is easy to un stick though.
Remove the clutch release cover, the one held on with 3 screws that is over the engine sprocket.
You may need a simple hand impact driver to do so.
After you get it removed you will see the clutch release shaft sticking out from the center of the engine sprocket. Hit this shaft once with a hammer to loosen up the clutch plates.
Do not hit it so hard as to knock it into next week. Just one good strike will do fine.
While you have it apart it is a very good idea to pull out the release shaft and the single ball bearing behind it (you may need a magnet to get the ball bearing out). Apply a good dab of axle grease to the hole they came out of, put in the ball bearing, add another dab of grease in the hole and put in the release shaft. The factory does not use enough grease when they assemble these engines.

Re attach the clutch release cover, tighten the screws securely, and the clutch should work fine.
If not, let us know and we can guide you further into other possibilities.

Your bike should have a #41 chain.
Some came with a #415 chain. Although it will work, it really is too big for the job.
A heavy duty BMX chain will work as well. They are #41

The little clutch release pin in the center of the engine sprocket should stick out about 1cm or 7/16" or close to it.
If it does not, my best guess is you are missing the ball bearing that goes in the hole before it.
The bearing has to be in between the internal clutch release and the little rod sticking out of the center of the sprocket.
Check this out, you can see how it all works:
http://motorbicycling.com/f30/animated-view-ht-clutch-assembly-countershaft-8939.html

Thankyou Creative Engineering/ Manic Mechanic for making it!!!

#415 is a small motorcycle or industrial chain. It is much wider and beefier than a bicycle chain.
Heavy duty #41 BMX chain is what the professional BMX bicycle racers use. The link plates are thicker and stronger than a typical bicycle chain. The rollers are made to withstand more abuse as well.

Thankyou very kindly for the offer of pizza. I do not need any kind of reward though.
I am just glad to be of help.
If I am actually able to help you fix the problem, all I ask is for you to pay it foward.
Help out someone else in need.

Tdaddy Hi And Welcome. Go To "tncscooters.com" In Their Chain Section They Have A Run Down On Chain Size, Pitch = Distance From Center Of Pin To Center Of Next Pin. Then They Have Diferent Roller Diameter And Different Width. Bmx Is Bicycle Chain, For 1/8" Wide Sprocket Teeth. IT SHOULD WORK ON YOUR ENGINE It Is On The Trick Bicycles And Coaster Bicycle. Your Narrow Chain Is For 3/16" Wide Teeth On Shifter Bicycles. There Is Different Widths In The 1/2" Pitch Chains. Most Bicycle Chain Is 1/2" Pitch. With Different Widths .hope This Helps. Ron .