05 suzuki katana 750 idle issues

Add some sea foam in the gas tank. Leave in idle run for about 5 to 7 minutes. Then idle the rpms up and watch the white smoke choke out. Which will clean or attempt to clean the throttle body out

sounds to me like your carbs may need cleaning and or a rebuild, i had a 750 katana that would do that as well, didnt want to idle when cold, then too fast when warm/hot, gave my carbs a good cleaning and it cleared up, the jets can get plugged really easily, could also be bad gas, any contamination and or particles can cause problems, especially if the bike sits without running for too long, hope this helps =)

Install new spark plugs and add a can of seafoam to your gas at the rate of one ounce per gallon to clean your carbeurator.

you need to have the carbs cleaned. i assure you it will run fine after if someone competant dose the cleaning. if you have any mechanical knowledge at all with a service manual you can do this yourself.

When you are on the bike and riding do you still have the choke out? And stop spraying starter fluid into the carbs..bad bad bad.... bikes start with out that stuff and if you need it then something is wrong.. your gonna mess something up doing that....let me know about the choke and we will go from [email protected]

Sounds like a timing issue

Ok, check breather hoses and vac pipes are on tight and not cracked and drawing in air. do you have wd40? Little trick is to spray around the inlet manifold rubbers, if engine smoothes out or revs slightly then this could be an indication of leaking manifold gaskets. taking note of where you spray it and any engine change can direct you to the problem.

TL

Not for sure but u might try to re jet the bike.i own a 98 suzuki bandit 600s and it also is really cold hearted. those bikes are unfortunately known for that problem.not that it was much help but u might try contacting Dales Holeshot Performance he specializes those types of bikes he also sells the jet kits.
i would also try to adjust the idle slightly higher hope this at least helps

u have the mixture screw wound in to far. its normally located on the bottom of the carb. try winding it out half a turn at a time once the bike has warmed up. also turn the idle screw out a quarter of a turn at the time its in to far thats why it idles at low revs. the choke is needed to keep the air fuel mixture right thats why u are having to leave it on for so long. hope this helps.