Hi Guys I'm new to this forum and would like some advice on a small problem. I have a 2010 YZ450F and have just put a full Yoshi RS4 system on it, now I have problems starting it? it used to start fine, two or three kicks and it was into life. Once I fitted the pipe it now takes a good 10mins of kicking to get it fired up!!! I have a GYTR power tuner and have being looking for a solution(MAP) on here but no one seems to have reported or had this problem yet. I have had a small play with it and got it to start a bit better by going +2 on the FI in the first box and -2 on the IG in the first box and leaving the rest of the map all 0s (stock). Thanks for your help. P.S. once started it runs fine.