[beatr911]

OK that power reduction looks about right.
Yes, my Concours 1000 (GTR1000 in your country) is of the same design family of the EX500, just two less cylinders. 108hp, water cooled, etc. but shaft drive so gearing change is extremely limited.

For what it's worth, I found a discussion on incorrect cam timing on the Concours.org forum that is interesting. The symptom was that it didn't rev past about 4000 rpm. Turns out the poster had mistakenly installed the intake cam 3 teeth retarded. No mileage indications but apparently it idled fine and ran fairly well under 4K.

Possibly going 2 full teeth retarded would be a significant step toward what we are after. I think the cam sprockets are 38 teeth for 18.95* per tooth or a retard of 37.9* for two teeth. Adding the 37.9* to the stock 54*ABDC intake closing results in closing at 91.9* ABDC. Wow, not much compression left there. The Prius retards from 72 to 105 ABDC so this is right in there to get a mild effect.

I normally get low to mid 50s mpg so am expecting to see mid to high 50s to consider it a valid improvement.

Once I finish the suspension refresh on the Ford Focus, I'll be in to the cams on Big Red. As part of the regular spring "tune-up", of course.