BladeZ moby with custom 47cc pipe-upgraded!

this is my friends pipe that went on his 47cc pocket bike, however we managed to take it off of that and bent the pipe by heating it up and bending the metal so it would fit properly. It adds a lot of acceleration but mabye 1-3 mph better in the top speed. stock it takes 7 seconds to go 0-25, with the pipe it only takes about 4.5-5 seconds. I also took off the air filter (for now) to have better compression in the engine to hopefully make it accelerate faster, enjoy!