Flames shooting out from exhaust?

[Usernameinvalid]

Started up the warrior yesterday for the first time in a couple weeks and it was back firing and shooting flames out the exhaust.lol. Cool but concerned! Smokes a tiny bit during start up then stops. After it was warm it quit backfiring and the flames stoped. Trying to sell it and the guy was like wtf was that? Lmao

 

[WV98YFM350]

Thats what they call a "hot bike" !

 

[Gen1Pat]

Lean condition. You are best to plug chop it, to determine what circuit needs adjusting. And, post in the engine section, please.