Quote:
Originally Posted by VDub90
I'm just curious as other people have stated it. But is this fact that Yamaha does indeed program the bike on the rich side so people can modify the bike? Or is this just internet legend passed on from thread to thread. I'd like to see the actual Yamaha documents saying "We purposely made the FZ6 run rich for all you tuners."
I just went and read the warranty info on the bikes, even if these internet claims that Yamaha has built into the feuling the ability to compensate for aftermarket exhaust. If your bike breaks because of it don't go crying to Yamaha.
directly from the Yamaha warranty pdf.
3. This warranty does not extend to:
a) MOTORCYCLES which have been modified
in any way from the standard specifications
as shown in the Owner's Manual, including
any MOTORCYCLE whose odometer has
been altered;
b) Use of lubricants, oils and fuel/oil mixtures
other than those recommended in the
Owner's Manual, improperly installed
accessories and use of parts or accessories
that are not equivalent in design and quality
to genuine Yamaha parts;
This is strictly from a Warranty stand point. I'd still like to see some Official Yamaha words that the stock fuel is set up for aftermarket parts.
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It is fact that the FZ6 is programmed fat. A week ago I had a dyno tune session done and custom map develop for my 07 by AF1.
This was done on an Eddy Current dyno which reads lower than a Dyno Jet dyno so yes the total hp looks lower, it all for relative comparison anyway.
1) The top graph is hp, the base line was done with a PC3 with the Akrapovic map, DB Killers out. The highest rating is with the custom map, gain of about 6 to 8 hp.
2) the middle graph is torque
3) the bottom graph is hydrocarbon, the more the fatter the setting. Note that with the custom map there a half as may hydrocarbons, this related to the relative richness of the bike. It is much leaner and after tuning. AF1 state that this bike is the cleanest FI biek they have ever tuned. The exhaust coming out is actually cleaner than the air going into the bike.
The tuning dude stated that pretty much all MFGs set their bike up to run rich. The goal is to get the bike out of the warrenty period without having to buy the customer a new motor. They anticipate that many owners will add a pipe and a filter update and lean the bike, so they make it fat.
The tech said that on the 1098s the mileage will go from 26 to 28 stock to 36+ after they make a custom map.
The bike runs great, much better mid-range and much, much better throttle response.