THE G4 HAD A HI/LOW SWITCH LEVER MOUNTED ON THE RIGHT SIDE OF THE HANDLE BARS, THIS WAS A SQUEZE LEVER, YOU CAN USUALLY TELL IF IT WAS A G4 OR G5 (THE ONLY 100CC MOTORCYLES KAWASAKI SOLD IN 1972) YOU CAN ALSO TELL BY THE AIR FILTER, THE G4 HAD A STAINLESS STEAL COVER WITH A THICK FOAM ELEMENT, THE G5 HAD A BLACK PLASTIC HOUSINS, THE AIR FILTERS WERE NOT INTERCHANGABLE, YOUR G4 SHOULD HAVE A CABLE PORT ON THE SIDE CASE FOR THE HIGH/LOW CABLE TO GO INTO THE TRANS 
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