8shot Posted April 23, 2010 Author Share Posted April 23, 2010 You sure it isnt YEIS ? a black box with nothing in it fits the bill here. ur right it is yeis and also it has a 34x on the head of the engine ill get some pics on later as its going to a mates to have the electrics looked at many thanks paul Link to comment Share on other sites More sharing options...
Moderator Airhead Posted April 23, 2010 Moderator Share Posted April 23, 2010 ur right it is yeis and also it has a 34x on the head of the engine ill get some pics on later as its going to a mates to have the electrics looked at many thanks paul 'YEIS' is Yamaha Energy Induction System A development yamaha made many years ago, some people dont think it does any good, but i think Yamaha probably know best. Also sometimes known as a 'Boost bottle' Link to comment Share on other sites More sharing options...
Recommended Posts