15-09-14, 04:41 PM
Why? Why does this seem to make the bike better? Surely if a bike does better MPG and runs better then the emissions will be better, I don't understand why Yamaha would retard it by 4degrees if the benefits are what everyone seems to be saying.
Mickey
Mickey


![[Image: 73337.png]](http://mefi.us/images/fuelly/smallsig-uk/73337.png)