I had exactly the same problem,

I used a renthal enduro high with 25mm risers , this is intotal 50mm

throthle cable and more important brake front cable was too short ,

checked it for a few days but couldn't get it right ,
took it too the dealer for maintenance and he installed goodrige front brake hose and removed my tank where he could easisly reroute the throttle cable , now I have more then enough play on the cable

only bad thing is it costed me a fortune , dealer had to check him self how to do it and easily spent a few hours on it ... , and you now dealer hours aren't cheap ...