Wonky cold start high idle?

[jjmaine]

My bike is slow to high idle on a cold start. The bike will start (cold start) idle around 1200rpm and then slowly climb up to high idle until the bike gets up to temp and then idles normally. Bike runs great otherwise and starts and idles fine when warm. Anyone know what could cause this? My bike has brand new plugs and air filter, was stored this winter with ethanol free 91 octane in the system. Could it be the coolant temp sensor?

 

[Bullitt6996]

How many miles? It may need some fuel sys cleaning. I like Lucas deep clean. Every third tank while running 92 from Exxon, Chevron, shell, or 76. Try this for 3 months and I'll bet you'll see this get better.

 

[jjmaine]

Yeah you might be right about the injectors maybe being a little dirty. It stalled when I first started it after winter and then had this little issue. It seems to be getting better the more miles I get on it. I only run 93 octane in my bike and then use 91 ethanol free the last couple tanks before filling the tank and storing it for the winter.

I'll be honest, I don't have much faith in any fuel system cleaner.

 

[Bullitt6996]

Be careful switching back and forth with ethanol free, that alone can create issues.