Location: Wilmington, Nc.. building fantastical shit
i'm just here for the vagina. and to have my sig here since it's useful.
and yes thats definitely a lean afterfire, but i'll surmise you haven't dipped that far in AFR to where you're at risk for a catastrophic meltdown. theres no load on the motor. when there load and you're lean, thats when you kill things very quickly. shimming needles won't do shit for decel since the needles are still seated for the most part regardless. smaller things like taper and the sheer amount of height offset play a role in idle AFR, but thats widely controlled by float height and the mixture screws.