Popping on decel

[Wingboy]

Took the header pipes off this morning.The nuts at the heads were not much more than finger tight.There wasn't much left of the old gaskets.Here's a pic of the one gasket and a new one.Thanks frekeyguy,i'll check the airbox as well.

 

[toysareforboys]

Persoanlly my 636 used to run WAY too rich when I acquired it...with a full length ARKA can it used to shoot flames on decel.....now with a fuel management system, and even with a stubby akro can it runs smooth....better fuel economy...no flames and no popping.

I had the same problem too! I didn't know it was running way rich until I had it on the dyno and my AFR was 10:1

I got the autotune, and made the AFR target lean in the cruise area, and 13:1 at 60% and over throttle. My fuel light use to come on around 180-185 and I just did my first full tank with the new tune yesterday, had a 2upper for the entire tank, fuel light came on at 230km's!!! INSANE!

The only thing I notice in the "lean" cruise area is a more abrupt transition from on throttle to off throttle, and vice versa, probably exaggerated by my +3 rear sprocket too I'm sure. But I can live with it

-Jamie M.

 

[Wingboy]

Thanks for the tips everyone.It was the header gaskets.Took it up and down the street this aft.It was perfect.What a relief.