So i bought in july my 2018 grom . Since buying i have put a zoom exhaust, koso hurricane air filter and airbox mod, EJK 3.5, tb cam, iridium plug. Valves adjusted .003 and ejk adj to stage 1 mods with cam. Here's the thing, my grom doesn't wanna go over 55 mph. It was kinda like that without all that money put into it. Im 5'7 and weight 180lbs, downhill tuck i get 59 - 60 but its mostly flat out here. Soooo what can be going on. Mecanically its great, timing is on point, valves rechecked and they are good. Same results with stock and iridium plug. Has Amsoil metric 10w30 sintetic oil. I see many vids people hitting 65 like it's nothing without most of my stuff. Im not asking to go over 70 i just want a steady 65.