Join Date: Jul 2017
Location: Jeffersonville, PA
Thanked 14 Times in 14 Posts
Tuning options after EXUP delete
Hey all. I have a 2011 Daytona 675R on which one of the EXUP (exhaust valve) cables failed, throwing a check engine light. Based on some posts here and elsewhere, I've elected to just remove all of the external EXUP hardware in lieu of replacing it. Now, of course, I've still got the CEL and a non-functioning EXUP. So while I have no desire to restart the argument as to the exact function of the EXUP, it seems that there is at least some basis for applying a different tune after disabling the EXUP.
While I wouldn't mind any extra performance that a custom tune would provide, I am still the slowest thing on the bike by quite a bit. So, I would be very happy to just to turn off the CEL and apply a base/stockish tune that accounted for the deleted EXUP. Note that I haven't started, let alone ridden the bike since I actually removed the EXUP. I did, however, run the last track day of the 2019 season with the CEL and apparently non-functioning EXUP and didn't notice any gross issues.
So, what does everyone recommend as my next step? I have zero tuning experience outside of ham fistedly changing some carburetor jets and shimming a needle or two. I'm considering the following options (as well as others y'all might suggest):
1. TuneECU to eliminate the EXUP/CEL and maybe apply a "close enough" tune for the missing EXUP. I currently have neither a Windows laptop or an Android phone (and don't have burning desire to purchase either one if I can avoid it).
2. Take it to a tuner and have them actually do a proper tune. Would this be a waste on my largely stock bike? Also, I'm in the Philadelphia, PA area if that helps, because I definitely don't have a shop in mind.
Also, a couple of things about the bike:
-Stock tune (as far as I know)
-Roughly 11k miles on the odometer
-Has been track only for a few years (and will likely remain that way)
-Intake and exhaust are stock/OEM with the exception of a Competition Werkes slip on
Thanks in advance!
2011 Triumph Daytona 675R
2003 Kawasaki KLR650
1980 Yamaha XS850