jetting problem need help

[freakk_nique]

I have a 1988 j arm banshee was completely stock with a .10 over bore. Just yesterday I put a complete turbine core2 exhaust system on. Changed the jets running 290 main and 27.5 pilot now the bike is running very lean. The original main jet was a 190 don't remember the pilot. But before the mods the bike was running prefect. Need some suggestions by the way the weather here is in the mid 30's

[freakk_nique]

Also I have k&n air filters no box anymore

[sheerider11]

Mid 30s?! Fahrenheit or Celsius?

If °f then that's way cold. Prob need to up jetting across the board. Pilot needle and main. Also, park the fucking thing. To cold to ride.

If °C then you should be close. I'd look into a leak.

Do a leak down regardless. For intake boots and gaskets that old I wouldn't be surprised if there all dry rotted and cracked.

Also check if your choke tube is in place. May have knocked it out.

[freakk_nique]

It's °f I just wanted to see how it was gonna act when I put the aftermarket parts on. I don't ride in the winter

[freakk_nique]

Mid 30s?! Fahrenheit or Celsius?

If °f then that's way cold. Prob need to up jetting across the board. Pilot needle and main. Also, park the fucking thing. To cold to ride.

If °C then you should be close. I'd look into a leak.

Do a leak down regardless. For intake boots and gaskets that old I wouldn't be surprised if there all dry rotted and cracked.

Also check if your choke tube is in place. May have knocked it out.