standard sprocket sizes

[ade]

can anyone tell me the sizes for standard gearing,as im finding im having to change down a lot in order for smooth riding as the engine seems to labour a lot.sprockets fitted are 15 front and 40 rear
also im thinking of up jetting the carbs,what size is recommended

[Titch]

I asked a simular question about changing the gearing of my sprokets, and was directed to this site Gearing Commander: Motorcycle Gear Ratio Calculator for Sprockets RPM Speed Chain It works by putting in your bike details at the top of the main page, and it gives you the standard sproket gearing and then allows you to change it using the custom bit.

But if you want to find out your standard gearing then it will tell you that also...

Titch

[ade]

thanks for that,titch.
i need a 43 tooth rear with standard 15 front,it should be ridable then as it s geared for speed,not good when running in!