Bought a 10hp 265 cc phantom need a little help
 

Bought my kiddo a 10 hp suzuki powered phantom. The thing takes off wide open when cranked and I belive their may be a part missing also I am looking to find an o-ring gasket for the carb. sediment bowl. Is there somewhere I could find a diagram for the motor so I can check reference intelligently the parts and pieces.. And where would one find the o-ring.