2001 triumph Bonneville very cold nature

Oil level over full or gas in the oil.

Carbureted engines like the Triumph have always been cold natured and that is why they have a choke. Try backing the idle mixture screw out a quarter turn. That may help.

yes, but it would be several thousand dollars with all of the parts and labor. these require feedback from sensors, a high pressure fuel pump, a different wiring harness, and plenty of other parts that are very expensive.

16 Liters

16.0 liters

under the left side cover you'll find three screws holding it in.

maybe little gas is flowing in your carborator. just adjust to get more flow the gas. no need to choke if the gas flows normally

most likely its a coil since when they get hot and underload that is when they may miss you can check this with a spark lod tester they are not that expansive only about 10 dollrs at your locale auto zone, just load that ciol and see if it fails...

What happens when you try to accelerate?

Does the exhaust smell 'weird' when it's idling?

The most likely problem, especially with the bike sitting up during summer, would be gas has gone stale. If the bike sits long enough, the gas will actually turn into a varnish.

Drain the tank, refill with fresh gas, and let it run a while.
Basically, you have to run out whatever gas is between the tank and the cylinders, so the fresh gas can get to the cylinders.

I'd put a box fan blowing on the front of the bike to help keep the ehat down. Blip the throttle after a few inutes. Depending onhow much old gas is 'stored' in the fuel lines and such, it may take 10 or 20 minutes to burn out the old gas. Keep blipping every few minutes, and let it cool down after 20 minutes. Some bikes have short fuel path and clear in 2 minutes at idle, I've seen custom setups that took over an hour.