i have an nrg mc3 (DD)and ive noticed over the past few weeks that my bikes starting to loose accelleration completely (i.e ill be at a roundabout waiting to pull away, but wont accererate till it gets to about 20mph) its been puzzling me as to what it could be, the bikes been de-restricted and does about 60mph, but when i stop its extremely hard to get the bike moving again (also will have no response on the throtle if im doing say 50mph, let go of the throtle then re apply it) it feels like its cutting out. anybody have any ideas as to what it could be? also my headlights keep flickering at night time