Yeah
It does use valve springs. I kinda want to start the engine w/o its valve cover..
http://www.osengines.com/engines/osmg2092.html
here's a 0.4 ci one
http://www.osengines.com/engines/osmg2096.html
I loved bringing that thing to the 'track' and drive it among the 2-stroke rockets
Those 2-stroke rockets sounded like honda civics compared to the 4-stroke that sounded more car-like.
here's my "Viper"
http://www.nitroreview.com/reviews/viewreview.cfm?reviewid=154
somehow nbci closed my website
damn.. miss that car. I think I'm gonna have it shipped from wherever it is now (Singapore or Jakarta)