isaacog

I have just bought myself a Yamaha MT-03. I love it except it has a few intermittent problems. 1. It cuts out at some point during most journeys, usually when I am accelerating after slowing to under 15mph or when I am pulling away from a standstill. It is not just a case of me stalling the bike. 2. When riding, if I open the throttle fully nothing will happen or the engine will stutter, then it feels like I have suddenly been rear-ended. Again, this a few times happens on most journeys. 3. When riding with the throttle in the same position the bike keeps accelerating and decelerating by a couple of mph and will sometimes suddenly decelerate The bike is a 58 plate It has done around 5000 miles. it has been restricted using a throttle stop to 33bhp it was in the dealership for around 4 months not being ridden The dealer I bought it from has told me that he had ridden it and it was fine and that it was probably because I was being too aggressive with my throttle adjustments. I am not convinced by this as I rode home today as smoothly as I could with little improvement. Does anyone have any idea what could be causing this and how I can rectify it?