Riddle me this...

[Doorag]

So if aftermarket cans cause the engine to run rich - and - K&N filters cause it to run lean - then - shouldn't they offset each other and not require a PCIII to basically run OK?

 

[wrightme43]

So if aftermarket cans cause the engine to run rich - and - K&N filters cause it to run lean - then - shouldn't they offset each other and not require a PCIII to basically run OK?

LOL

My understanding is that it may run rich at one rpm band, lean at another and they can line up to cause a problem, but the bike is so stinking rich it really doesnt matter except that it could have more power leaner in the right spots.

 

[OZXJR]

This would only be a problem on the 07+ ........yes ?

 

[d_cirkles2000]

i was under the impression that the fz ran a little lean stock and if you changed the exhaust any that it would run to lean to a dangerous point?