Need tuning help 2014 xmx
I have a 2014 xmx with a rossier full system pipe. No programming and stock air box and filter. Obviously it’s running a little lean, what are my options for this. I really like the idea of the race ecu but I don’t have the supporting mods for it. EI; exhaust cam, green injector, bored TB. My question is what will happen if I add a bigger injector to the mix ? I want to ditch my air box lid but I’m scared I’m gunna lean it out badly without some way of adding fuel. I didn’t really want to buy a FMI because I’ve noticed lots of guys say there are junk. Please let me know! Thanks !