I also have a pciiir and yes it is nice to be able to adjust timing.I did like conrice did and thought I had a great set up,then I went to a place that had dyno runs for $20.00 and was disapointed what I saw.My air fuel was all over the place.The first run my bike produced 135 hp.The tech did a custom tune and then I got 151 hp.Now I know all dynos are different,but either way thats a 16 hp difference from what I thought was good.

 

Proof if ever any was needed, that a PC without dyno runs and expert tuning, was a bit of a waste. If you don't measure, how can you improve?

 

So does all the previous mean that my bike is running lean without the pclll?

 

No, your bike will be running as Honda intended. But manufacturers have emmission targets to hit - bike tuners don't, so they usually end up enrichening the air:fuel ratio to get the best power from the bike (there's more to it than just that though).