Moped Army

ok ,somehow i scored a magnum for $120.00,wow!!
this thing is a monster
i need some puch experts to tell me the difference between this engine and the the ususal maxi engine
well i know the engine is a 2 speed and all but whats up with the huge cylinder,jug,etc.is it the same as the smaller engine
also the exhaust is huge,anyone have side covers?
let me know ill post a pic later today
thanks
MPG