Athena Roller Weights 15X12

5 to 6gram is good for street performance below 5gram use 2000rpm torque spring along with 70cc kits and high speed variator and clutch.

Athena roller weights, you should change your roller weights every 500-1000 miles they do wear and a loss of performance is what happens all around.

Belts, rollers, clutch pads and variator should all be checked every 500-1000 n miles for wear this is the easy place to loose performance and the easiest to fox and keep on top.