I have a Janome 6600 that sews with anything although I am pretty exclusive with Organ needles. I also have a Janome Horizon that didn't like the Organ needles so I use blue-tip needles and blue bobbins and it works fine. Actually, when I say blue-tip, only size 11 are blue. The other sizes are other colours. My LQS is owned by a man in his 80's who has been working with sewing machines for his whole life. He tells me that Janomes like Organ needles which is probably why your machine came with them. Get some advice from the shop where you bought your machine.