Thanks guys!!...The pipe is made from a Yamaha YZ 80 aftermarket expansion chamber..I got from a motorcycle salvage shop for $20....
The motor is a Cag stage 3 (54 cc) I ported the intake manifold & has triple stage black widow reeds.....Also the exhaust has been port matched...This thing should fly!!.The power output will be close to 5 hp @ 12000rpm..My goal is to cruise easy at 25-30, and
get it on at the track...Aka.. vacant parking lots.. 50 plus mph !!!...