Runaway revs

Hi,

I recently started up my Piagio Sfera 50 (with mods) and the engine revs, without me touching the throttle, raced away to max! I tried twisting the throttle but nothing happened and the ;feel' of the throttle was normal.

Could it be my iginiting control sysytem that's gone kaput?

are your're seals still oke?