Roller, slider questions
 

So I'm cheap...and have obtained a cheap Chinese scooter. Decided I wanted to go faster. So I removed three rollers out of the variator. Revs and shifts much more aggressive. Reaching 80km Max speedo. I'm sure life span will decline but much performance increase. Going to jet it up. See if it get faster revs higher speeds. Is this crazy?? Thanks all in advance.

Jetting up from factory jets is always a good idea. It helps power and even engine longevity.
-First, drop the float bowl and determine your existing main jet size and type (the Keihin style jets look a little different from Mikuni style jets). GY6 usually has Mikuni style. Plenty of comparison pics on the internet.
-Order the next three larger sized jets from your factory jet. Sometimes you can get a jet kit with 3 different sized jets in it.
-Try the different jets. Warm up the bike and do a top speed run for a few miles. The correct jet will cause your spark plug insulator to look tan, or egg shell color when you remove it.
-If the insulator is white or very light tan, you need a bigger jet. If the insulator is dark gray or black, you need a smaller jet.
-This is hot rod tuning 101, and applies to any carburated piston engine: Scooter, car, airplane, boat, etc.