Well, I tried the Ben W map and it made it a little better, but not much. Still ton of buggling down in 1st and 2nd right between 2k and 4k. I will try the mw919mori4 map next, but I hope I'm not looking in the wrong direction here... Hope that it is as simple as a map issue.
You need a map for a 4:1. (for the reasons just explained minutes ago via Hotmail to you)
I don't have PC software on this computer I am using.
Go to the drop box again.
Get to the mcromo compilation.
Get to the maps.
In the 900RR conversion folder try the Simpson Racing map, but you'll have to convert it to map format.
In the old map format folder, try M112-004 which if memory serves me correctly, is for a 2B full system 4:1.
I might be wrong though, look at the Notes the PC software will display, it will say what it was for.
I really can't do more to help you until I get home again.
Oh yes, you have taken out as much throttle cable slack as you can, right ?
EVERY 919 ever built seemed to leave the factory with mega slack, and slack really messes up the fine throttle control near closed.