trying to figure out what brand piston was put in my sport 400 L
it has 3 sets of numbers on it on the carb side 87901 in the middle 9233 ont the exhaust side 86.92 mm it looks like this

87901




9233
86.92mm

 

I found a piston that diameter but nothing else.

8036D050 Piston Kit MOR 490/500 86.92mm $289.00 kit
http://www.mainlymaico.com/parts/maico_78-82.htm

Someone may have put in an Australian motorcycle piston. [img]i/expressions/face-icon-small-confused.gif[/img]

 

how dose that work