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Yes, the first link is called a "variator". It will make your scooter accelerate faster AND have a higher top speed.
The second link is the tool YOU will need to get it off + a wrench.
It's really easy to do. Something we can easily walk you through over the internet.
Put the Met back together and holy shit it was flying like a wild bat last night. I used a 7g Met rollers after I shved them down to 6g. Have to give it a try on warmer temps like later today.