I need some help/advice

[BigTzzy]

I have a 150cc Tank Urban Racer.

I am having some issues with the variator/clutch.

Let me first tell you what I have installed on my scooter.

1. A KOSO performance variator with 10g rollers. (The stock rollers were 13g)
2. Red clutch springs w/red torque spring. (ebay)
3. Uni foam filter with velocity stack.
4. Stock muffler was "hollowed out" some by prior owner.
5. Racing CDI
6. Performance Coil and wire and NGK iridium plug.
7. 130 main jet and bigger pilot jet (I forget the number)
8. Kevlar drive belt.

Here is the issue I'm having.

Before I installed the new variator and clutch springs and belt, when I would accelerate from a stop the clutch would engage just above 2000 rpm on the tach.
After installing the new variator and clutch springs and belt, from a stop the clutch is engaging just above idle or about 1800rpm on the tach.

It was my understanding that lower weight rollers and the red springs should allow the engine to rev high rpm before the clutch engaged. Please correct me if I'm wrong.

Also, I have never been able to get my scooter to rev above 5500 rpm with a load on it. On the center stand it will rev to 8000 rpm without any problems.

My performance goals for my scooter was to make it accelerate faster off the line. I am not too concerned with top speed anything above 50 mph is fine with me as most of my riding is in the small town that I live in.

P.S. The "load" that my scooter has to move is my 290lb behind.