does any one know what temp i should take the stock jet out and replace to keep it from running to rich when it is cold o say around 10 to 15 at the coldest i did not like the dealers ansewer of it should be all rite in any weather

 

It says what to do in your owners manual.

YFS200

Oh, in colder weather, it will run lean.

 

My Mikuni pocket tuner guide says to move one jet size down for each +25 deg F or 1800 ft elevation increase, up one size for each -25 deg F or 1800 ft decrease. They show one jet size increase being +10 from 200 through 330 except 260 skips to 280. Below 200 it goes by 5 and above 330 by 20.