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Old 07-07-2008, 12:43 PM   #14 (permalink)
Parabellum
Searching for the tower.
 
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Join Date: May 2007
Location: Central Illinois
Age: 29
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Sportbike: 2007 Yamaha FZ6
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Quote:
Originally Posted by frank80 View Post
If you change your exhaust you will want a fuel controller. The bike will run lean and you can risk burning up your head over time.
Simply not true....at the least, its VERY misleading how it was said above.

A reduction in backpressure will lean out the engine a LITTLE...but its a MUCH bigger issue on Vtwins (that NEED more backpressure) than I4s.

The FZ6 exhaust is about 5 feet of tubing, containing multiple bends and TWO catalytic converters (on the 07+ models anyway).

Changing out the muffler, hell....REMOVING the muffler is NOT going to cause the engine to lean out to any measurable degree on this bike.
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