I am comletely unfamilliar with the different YS models like dingo, FZ,AC could someone please tell me the differnce of the 140s? Also anyone know the weights i really need to know the weights of the 140's thanks!

You can try these places:

http://www.ysperformance.com/prod140.htm

http://www.ysperformance.com/prod140DZ.htm

http://www.centralhobbies.com/Engines/YS140L.html

http://www.centralhobbies.com/Engines/engines.html

The FZ has been superceded by the L, I believe. Also, there was never to my knowledge any 140's but the FZ, L, DZ, and the yet to be seen 140 Sport.