Blue flames!

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volroom

Race Dog
Joined
Jun 15, 2011
Messages
3,860
Reaction score
2
Location
Abu Dhabi
Bike
BMW R1150GS
I set the fuel controller leaner (from setting 8 to 6), and saw that if I blip the throttle slightly at idle, a blue flame appears out of the exhaust.. Don't think it's a big concern. I'd just like to know, when does this normally happen? You'd think that this might happen if it's running to rich...or maybe, running leaner makes the exhaust hotter and ignites some unburnt fuel..not sure. any take?
 
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