Slow off the line? 150cc

[Spencer]

Hey guys, I am new to this forum but I have been in the scooter game for about 3 years now and have owned 5 scooters so far and 3 of them of have been 150cc GY6 scooters. The problem I am noticing is that my 2013 Puma Romeo 150cc scooter is kind of sluggish off the line in the 0-15 mph mark, but after that it is great! I have maintained it very well with oil changes every 300 miles to the proper oil level. So far I have about 1,100 miles on the scooter and the aftermarket parts I have is a NCY drive face, 10 gram Dr.Pulley Sliders, and a Gates Kevlar belt. I will say that I ride extremely aggressive and at full throttle or close to it 90% of the time, especially off the line and I am in the city in stop an go traffic alot. I am thinking it might be something with the clutch torque spring? Anyone else have any ideas? Thanks!