Good buy!!! I haven't been in one enough to see for sure, but I think the motor is a variant of the GY6 platform. But it has differences, mostly in the cylinder and Head. It's 4 valve first off. Takes a different plug than GY6. If you order the Two Bros exhaust that's meant for the Super 8 It *SHOULD* fit, possibly with slight modifications. Your best upgrade would be in the variator, weights, and torque spring. They come with heavy weights for lower RPMs and lower fuel consumption. Pull your weights out and check if they are 18mmx14mm, if they are order a set of 11-12g Dr. Pulley sliders, maybe even 10g. The 4 valve engine likes to rev higher than a 2v engine, so you'll have to experiment to see what weight the Movie likes. That engine has potential, I would say 70mph on the stock bore isn't out of the question. I would say there's a good chance the Dr. Pulley variator for the GY6 would fit your bike. Just find somewhere that accepts returns and order it and try it out. You shouldn't have to drill out the airbox, try everything else first then use that as a last resort, you can't go back really once you drill. I've had three Two Bros pipes on GY6 scooters, they kick ass and sound AWESOME with a thunder like rumble. Another basic upgrade, get an NGK Iridium CR8EIX spark plug, they are $10 but will last 2x as long as regular copper. A 30-32mm carb would also bump up the performance quite a bit on that scooter, but that's gettin in pretty deep. You should be able to see results with the stock carb. Also one thing I've done to a Movie we sold was strip off all the emissions junk, it helps the scoot to not breath it's own sh** (the emissions system recirculates exhaust gas back into the airbox to reduce emissions), and the system uses engine vacuum to run the valves. I would love to see a Movie with a bunch of mods, when we first got them in i really wanted to buy one, but I'm too cheap for new bikes LOL.