I have just fitted a Black Widow system to my bike,( 55 reg XTX ) everything else is standard, the bike now feels less restricted and revs more freely but still has the surging issue at fixed throttle position i.e. 30mph in 3rd etc. I intend to check the twist grip and if needed do the mod to smooth out the action, chain is new and adjusted correctly and Cush drive has had rubber inserts fitted to tighten it up.
I have read up on changing the settings on the dash. What I would like to know is if there is a default setting or do I just adjust up or down and see what makes a difference and how much can I change setting without any damage being done.
Bike is a short trip toy only so don't want to do loads of mods etc and I want to keep the bike as standard as possible, air filter etc.

Regards, Al.