Fellas, just bought a couple of 2016 mongoose 270cc for my kids and the 38mph is great for them. For now of course, but it seems like there's something I can do to increase speed and power. Is it all sports look for these bikes or can they be modified. So far, I haven't found nothing online as far as performance parts. There's gotta be something out there. And yes, I did pulled out the screw on the throttle.