У вашего броузера проблема в совместимости с HTML5
can chose between pocket bike or mini quad? check it out
http://pocketbikeorminiquad.blogspot.com/
improvements for 49cc atv since last video:
- rebuilt
- new heavy duity clutch
- header
- and higher gas to oil mix
still not running right at lower RPM's needs a carb clean and could use an engine rebuild