Hi,
Well I can tell you that Liam from MCN had it set for a much better performance, power / acceleration wise rather than top end. Sadly, you can't seem to have both a better top end aswell as acceleration.
Top end should see you for another 10mph or so, maybe a bit more. However, it takes ages to get there and in my opinion isn't worth it seeing as it's a 125, so you don't get many roads to get it that fast.
However, if it's setup for better lower grunt, the bike WILL now pull in all gears (Ever faced a hill on an R125? Then you'll know how it hates them!!!!). With the modification, it will now pull even up steep hills. You can now comfortably overtake where as before you just didn't have the confidence in the bike delivering the power quick enough.
Also, the bike will now wheelspin (if that's your cup of tea). Best of all, it won't void your warranty as it's using Yamaha parts!
The results are impressive, especially if you have an aftermarket pipe, with the Leo vince showing the most impressive gains from those tested. Also, i'd strongly advise the double bubble screen. it's good for an extra 5mph extra at least, and makes busy dual carriageway rides less nerving (I found with the standard screen, unless I was fully tucked in that the air was so turbulent over 60mph that I lost confidence in the bike as it was terribly twitchy!)
sign up over at OneTwoFives. It has a dedicated section for R125's and i'm hoping it will become a good community. It's far less hostile than 125ccsportsbikes.
I'll give you more info very soon, as im due to get it carried out on my own bike in the first few days of January.
Merry Christmas guys