Reddit mentions of NCY [12 gram set] Variator Roller Weights (18 x 14) for GY6 and Genuine Scooters NCY

Here is a tuning kit

> do the weights matter if I get some stage six one or some generic ones

Unless you are racing a decent set (of 6) is probably $10 or you can go fancy and get $15 ones. NCY weights are more like $20 but I'd consider that high end fancy schmancy.

It's worth noting that your weights should be inspected/changed every 1000 or so miles anyway, so if you bought used it would probably be good to go ahead and change them. Here is a very good GY6 service manual too BTW

You will likely also (arguably) need a torque wrench for reassembling the transmission and a clutch holder. If you don't have these you can get by using other methods or a strap wrench

Its worth noting there are also sliders that you can use instead of rollers. If it makes any difference probably has to do with the slope in your variator and the design of the slider. There are many, many different combinations.

I found one source that says:

> "for every .5 grams heavier , it seems as if you loose about 250 rpms or so. Maybe a little less. "

but I cannot say if that is accurate or not.

You might also be able to change your variator to get a little bit more difference as well. As with changing weights its something some people seem to swear by and others say does nothing. Either way companies like NCY make nice parts that may be lighter and generate less/dissapate more heat, last longer, and offer a smoother ride than stock parts. If you go this route you can usually do it one piece at a time.

I'm still pretty new to all this though :-O so by all means if someone sees I said something inaccurate let me know!