Important Notes on Expanded Target AFR Tuning

 Important notes on how to log when you have expanded the operation range

When the Target AFR has been expanded to the full RPM and most if not all of the load range, care must be taken to ensure you do not damage your engine.  Here are some instructions on the best way to get data as well as very important notes on the Target AFR for tuning. 

No drag racing while we are tuning with expanded Target AFR Table!

When expanding the Target AFR's closed-loop operation to almost all of the operating range for tuning.  What this means is you are lean in the higher RPM/Load ranges so your powerband will be greatly diminished.  However, this is necessary to tune in those areas.  With this in mind, it is very important not to wack your throttle wide open, but instead make nice slow roll-ons allowing giving the ECU the time it needs to correct the fuel trims.

Moving forward, it is important to try to hit as many load and RPM combinations as possible.  I like to slowly build RPM's in 1st and 2nd gear to 5k to hit the high end.  I find 25 mph flat roads and get into 5 and 6th gears to hit the low RPM range.  I find parking lots that I can ride in 1st and 2nd gear for the low range as well.  Mountains and hills are good to go into one gear higher then normal to load down the engine.

When merging onto interstate, I like to wind up in 3rd gear until 5k (about 80 mph) to sweep those ranges as well.  Just be safe, but have fun with the tuning process.  

How to get the best data:

There are two methods for recording good logs for use in tuning your engine.
First method:
If you are up to it, you need to pick a route of about 35 minutes that offers opportunity for different load and RPM ranges.  Hills and dips, straightaways, etc.  If you do not have this, then try to load the bike under different ways by taking off in 2nd gear a couple of times, up-shift to higher gear then you normally would, even get in 5th gear and lightly apply the rear brake while maintaining the same RPM with the throttle (do not do that often and do not over heat brakes).  Rev your engine up close to rev limit when in 1st gear and 2nd gear (up shift after rev high).  But, do not be rapid on the throttle, the key is to allow the ECU to make corrections.  These corrections are what I read to make mine.  So, slow-roll ons, especially if going wide open throttle since we do not want the engine to go leaner then the 14.7:1 it is set to.

Second method:

If you are not comfortable riding the above way, then just log under slightly more aggressive then your normal riding.