Popping & spitting when throttle is open

[Guest]

`While bike is cold,the engine is idling ok,once the throttle is open there are popping & spitting noises,as soon as the engine reaches normal temperature,everything is ok & running perfect.Any ideas guys...

[bluewing]

Mine dosen't run very well when it is cold, I think most of our wings have to be warmed up before they run properly. I let mine warm up to two bars before I ride it, it has allways been that way, after it is warm it runs great.

[William_86]

my bike will pop some explosions back to the airclenaer box when cold. i usually ride easy for about 5 mins in first and second gear to let her warm up with a little bit of choke.