Quote:
Originally Posted by Rangerscott
Carefull with part ordering with a 169FMM engine. A true 169 will have a 69mm bore and 17mm piston pin. Non-real ones are like the 166 engine with the 65.5mm bore and 15mm piston pin.
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That is where things get really screwy...the motors are stamped as 169FMM, but have an actual bore of 65.5. The stampings on the cases no longer match the engine specs on many Zongshen mills.