It's not a blaster motor in it. It's some sort of street bike engine. I can see the stator cover with another cover right above it and what looks like two valve covers up under the plastics.
yeah he says it's a yamaha 650 motor coming with it and everything it needs to be hooked up. i doubt it'll go anywhere near 150 but it looked like a good deal so i posted it up. plus you could always toss the 650 motor and put a blaster motor back in it.
well my honda 600rr as a 44t in the back and a 15 in the front, i went -1+2 stock is 42 and 16 and my bike does 150 on the track quite easy, 520 conversion