Check intake for leaks, do a compression test to see if intake valves are leaking

 

I checked for a air leak around the intake but I will do a leakdown test on it, this bike has 15000 mile on it ,I can"t understand why there is 10 degrees different in timing&nbsp\\; between cylinders,.

 

It's common to see AFR and timing to jump all over the place at idle due to the MAP pulses. The timing and AFR&nbsp\\; should mellow out off idle though.

 

today I unpluged the MAP sensor and the bike ran good, as soon as iI plug it back in it starts backfiring again. I have another MAP that I put in the throttle body and put the wires on the other one and let it hang ang it runs good and the light dont stay on ,what do I do next.

 

I would check the IAC steps now but you need a digital tech or a SERT in data mode to see what the steps are.
&nbsp\\;

 

After all the checking the customer said the ecm had a hd download in it but with a twin scan 2 it didnt show that,I put a new ecm on the bike and now it runs good.. thinks for the input