It sounds as though it is starving for fuel. Check the fuel filter and replace if necessary. Also check and or clean the carburetor.
SOURCE: yamaha xv535 wont idle off choke
****, squeeze, bang, blow... check filter, fuel and spark... its going to be prob a fuel problem. if the bike hasnt been running all winter run some gumout through it... and get rid of the fuel thats been sitting in the tank. more info would help but it sounds like you got varnish in your carb....
SOURCE: not idling
The choke allows more fuel into the engine, I would say that you have dirt or bad gas stuck somewhere in your carb, so give it a good and thorough cleaning, including the pump. Also make sure your air filter is clean!
SOURCE: my 2001 Yamaha YZ 250F won't idle without choke.
did you pull the float pin out and the brass housing that the pin goes in? you may have to clean that and go get some spray brake cleaner with the red straw and blow out all the ports. the reason it will idle with the choke pulled is it shuts off air flow which pulls more fuel to air. without the choke it cant get enough fuel. i would try the bowl again starting with the float and needle. but go ahead and just really clean it all the way through or you will just keep chasing it.
SOURCE: only idle with choke on
Sounds like you have blocked or partially blocked pilot jets,
this can happen if bike has been sitting anf fuel has gone stale in bowls or contaminated fuel in tank.
hopefully bike if well serviced or could be caused by air leaks or even tight inlet valve clearance if bike has done a lot of miles
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