Thanks for mostly clearing that up for me, pig9r. Here's what I've been running-
1-with an underseat K&N and D&Ds, tune 20221
2-with the underseat K&N, cat delete & stock mufflers, tune 20220
Both of these tunes with the speedo -6.3%, secs at 100%, no top speed restriction, rev limit at 6500 and o2 sensor unchecked.
So now I should recheck the o2 sensor and run the 12 minute tune after loading the modified stock tunes, right? Is it right the 12 min tune needs the o2 sensor with the checkmark to work?