Need Help Stock sprockets on RC390 2022?

[Jake_C313]

Hi There,

I purchased my bike with a bunch of sprockets and can't seem to work out what the bike comes with from the factory (2022 RC390)?

Once I figure out the base, I am thinking about going up 1 tooth in the front OR down 2 teeth in the rear as the track near me is a horsepower track with long straights.

Which combo would you guys recommend.

 

[Keep The Manual]

The stock sprocket set up is Front 15 teeth and rear 45 teeth. I read somewhere that the biggest sprocket you can put up front is 16 teeth before it interferes with the plastic sprocket cover. I was thinking putting on Front 16 teeth and Rear 42 teeth which would give you a top speed from 180kph to 206kph +14.3%. There is a website that lets you enter sprocket sizes and shows your speed adjustment, but I forgot what it was called.

 

[Karfanatik]

https://docs.google.com/spreadsheets/d/1T42Kjs53Xbad4d_krrIw5OPAEve9NntuLEwNRPkrnOY/edit#gid=0