Welcome to the forum and Kymco family.
The roller weights are I used are:
Dr Pulley 19x23mm 19g flat weights, and sliders (3). Heavier weights cause the clutch to lock up faster which reduces wear. Also, RPMs are slightly lower on the highway. I was warned to choose weights that are close to the stock weights.
I put 9K miles on them with no problems. Sliders supposedly last longer than the original roller weights which can develop flat spots.
The Dr Pulley brand is good and can be ordered from any place that sells them.
I ordered min from:
Buggy Parts NW
1990 Cougar Ave SW
Albany, OR 97321
(503)860-7250
Quantity Name SKU Price Subtotal
1 Dr Pulley Variator Slide Piece 2318-J UNI-SP2318-J $12.95 $12.95
1 Dr. Pulley Slider Weight for 250cc - 19g - 23x18 (Weight: ; ) UNI-SR-23X18-19G $39.95 $39.95
SubTotal : $52.90
Shipping and Handling Fee : $5.00
Tax Total : $0.00
Total: $57.90
Most parts need to be from a dealer as many aftermarket parts won't fit. Also, small 50cc scooters get modified a lot and are very generic. 250cc is much more powerful and owners often don't modify the motor, etc so there are very few aftermarket parts available.
Here are a list of pictures of repairs which are very valuable when you need to work on your scooter. The files are very large and you will need a fast internet connection.
http://www.wecandobetter.com/dnload/Scooters/Kymco/