| I'm a bit green to the workings of a 2 stroke engine so please explain.....is that blowback coming back out the carby. I thought reeds were supposed to stop that. ( Maybe it's a graphical error! )
Also, can someone please explain what the difference is in different ported engines. I bought a big bore kit with 3D porting qouting it is more powerful than a 5 ported engine. What and where are all these ports? | 
