2010 YZ450F Starting problem with new RS4

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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now