You're overthinking this way too much. Unless you're putting around like grandma with the throttle barely cracked, there's no way the slight low-speed enrichening the 02 dingles provide can have much effect on fuel consumption, nor can the K&N filter. If the filter is more restrictive than it should be, the mass air sensor will tell the ecu to adjust to keep the mixture closer to ideal and you'd likely get less consumption rather than more. I've run K&N and BMC lifetime filters on a couple different machines and the only difference between those and stock is they can be cleaned and re-oiled rather than tossed in the trash like shrinking stock foam elements. Performance differences can only be quantified on a dyno. The seat of your pants isn't sensitive enough.
Just ride the damned thing.
Thanks H..... I'm glad someone thinks I'm thinking
However I too have been using K&N for 17years on my CBR11XX and know that a thick coating of the oil on the media does affect mileage.
I will start again from oem once I use some more fuel so the tank isn't a clumsy heavy mass to remove - but 1 thing I thought of last night (in between naughty dreams
), was that the copper washers from the O2 removal kit plugs (which I left in place) might also be involved..... ie: I read on a forum somewhere, that car mechanics were putting an extra washer/spacer onto their O2 sensors to reduce hot/lean running issues, even though I don't see why that would work, maybe it does affect the sensor...... so today I'll remove those little copper washers and tomorrow I'll see if that has any effect.
It's all part of the fun...... but I'm 99% certain my K&N was way to heavily oiled out of the box and may be more restrictive than the paper filter...... just a bit too much fuel in the tank to want to hoist it off yet
Might be an issue I caused, acting on a thought bubble and inserting those extra washers onto the O2 sensors
...... or it could be a batch of old fuel from the fuel stations......
..... I'll also check the ram air intakes in case one is blocked..... but the thing performs well so that's unlikely...... I want my 400kms touring range, less than 350 here in Aus is barely acceptable (guys spend all day worrying about fuel stops instead of looking for good coffee stops
PS Menso..... I have the dongles too..... yes they smooth out the city traffic experience - but so too does a gearing change to reduce the standard tall gearing feel in traffic...... my SDGT was pretty good but I chose to try the dongles and they worked but were not that much better (for my bike & speed limits etc). I just noticed my usual economy was much lower, so I am checking my mods by going back to stock and starting over....... it's good therapy on a rainy day