Starting problems, Street tripple 955i

Haaay Guys,

As you can see I ve a slight problem...
Not to long ago I ve bought a Street triple with a 955i engine.
Totally happy with it, runs smooth soo i'm very content.
Only few weeks ago starting got a little difficult.
When he gets a spark he immediately starts running.
Sometimes just nothing happens when I pull the front brake and press the startbutton..
( All lights are on etc.. so he gets power..)
Usually when I wait a little while it suddenly connects and like a said immediately starts running.
I m thinking on a lose contact in the brake start button or side standard.

Hope someone maybe had a similar problem and is willing to help,
Thanks a million!!