i have replaced the spark plugs new gasket, top and bottom, nice amount of compression, sounds like it wants to go but just wont.
any ideas ?

jamie hill, March 2008

help me asap i was riding my py90 last night stoped to let my friends catch up and then i went to kick it oover and its lost comperison and wont start any ideas it ahs not air filters onit but was not a problam before when i kick it over it sounds like and feels like alot of air is comming out of the carb where the air filter is ment to be please help asap thanks

josh rainbird, September 2011

try the tappits on the head if the problem is so u need a feeler gauge so u can set them

stefan, April 2011

hello there i had the same problem but i brought a 140cc Xsport engine for it. but the problem is the stator plate. hope that helps

Evo, April 2010

THAT MAKES 2 OF US BUDDY

I HAVE A SUKIDAPY90 AND IT WONT START LIKE YOURS AND I HAVE CHANGED PLUG / COIL / HT LEAD / AND I ALSO NEED TO FIND A KEEWAY OR KNOWN AS WOODRUFF KEY AND FLYWHEEL IF YOU HAVE ANY IDEA'S ---THANX

SCOTT, June 2009

http://www.chinesepartsandbikes.co.uk/PY90PAGE1.html

marc kincaid, May 2009