1994 fourtrax300 hard starting when cold

This is the only quad I have ever worked on, and haven’t worked on a motorcycle in 35 years.

Rebuilt the carb a couple of years ago and it starts and runs great when the engine is warm or it is warm to hot outside air temperature. However, in the winter, I have a hard time getting the engine to start and stay running. The engine will require full choke to start when it is cool outside (40-60 F) When cold, (below 40F) it takes repeated start attempts, and even then the engine runs at very low rpm and dies. If I try to accelerate with throttle, engine immediately dies. I must repeatedly start the engine until eventually it gets warm enough to idle, then I’m in business.

I have the carb off now to install a new primer assembly that was leaking and thought I would adjust something if need be why I have it off.

Any suggestions on carb adjustment or just cold weather operation would be appreciated.

Thanks,
Mark