Have mercy on me... I just installed an fmf factory 4.1 exhaust system (powerbomb header) on my 04 yz450. How can I tell if the engine is running lean/hot vs normal? The paperwork that came with the exhaust said that the system was designed to run with the stock jetting. I just installed it yesterday, and took it out for a couple of very short test rides through all the gears at fairly good pace. There is no hesitation, and the bike starts on the 1st or 2nd kick every time. Am I good to go, or do I need to test this some other way? Also please take this into consideration, I am strictly a recreational "older" rider that doesnt need max performance, only wanted to freshen up my ride. I just dont want to be doing any damage to the bike that I cant detect until its too late. Thanks in advance.