2nd gen 250r COLD weather! jetting/new upgrade carb?

[1972mercury]

I got a 83 250r bought a 86 250r carb for it but has the stock jetting need help finding out a good starting number for winter jetting. I'm talkin like single digits into the teens temperatures plus the trike has aftermarket pipe, silencer, reeds.

[yaegerb]

Take your pilot up to a 52 or 56 and run your main at 176 to 180. Leave the needle clip 3rd from top.