my new 929 is the first fuel injected bike ive owned and im fitten to do som maint. and am currious, if i were to put in a k+n air filter it will change air/fuel ratio right? or will the bikes computer compensate for the diff? im so used to carbs that i wood never mess with air/fuel with out changin all the affected parts(jets, pipe, air filter). i know peeps will say get a power commander to solve, but is it nessisary to maintain tune? also, im gonna change the oil and with olny 3200 on the ticker is this motor still a good canidate for sythetic oil? previous owner used whatever walmart had cheap not synthetic. i know that after too many miles synthetic will cause leaks, and its best to stick with one brand and i never skimp on motor oil for any of my motors, but when you buy somethin used what do i do? syn or conventional. thanks yall

 

You don't need a PC, your stock ECU will compensate for the slight change (if any) caused by the K&N. For the oil, use Shell Rotella T in the blue jug (not the white one). Wal-mart has the best price (around here) at 19 bucks for a gallon and the oil filter for a Civic (sorry don't remember the number) its a bit longer but fits fine.

 

thanks scooby, thats what im hearing, as for the rotella, is that synthetic? i guess no body else here knows much about FI on this bike . a civic filter really? that somehow dont suprise me...peace

 

The Rotella T is synthetic bambam. It only comes in 5w40, as opposed to the recommended 10w40, but it seems to be widely accepted here as one of the better oils you can put in your bike and a lot of people here use it. (including me)

Not sure about the filter size for the 929. I know the filter size for my F3 is the Pureone PL14612. (Purolator seems to be the most recomended on here, Fram is cheap paper crap) If I remember correctly, I read somewhere that your 929 can take the longer PL14610 (3.5" vs. 2.5") but you should double check before you take my word as I only know 100% for my bike.

Edit: I know idodirt has said he uses the PL14610 on his 1000F, if that helps at all.

 

10-4 bro, ive got honda filter comin, and yer rite about fram oil filters, i took some engine building classes at college and one thing the teach did was cut one in half to show us the roll of toiletpaper inside.....junk...thanks bro......peece

 

Your Electronic Fuel Injection system will either have a Manifold absolute pressure or Mass air flow sensor, and Throttle position sensor (probably not this one), and O2 sensor to see that a little more air is coming in and thus will compensate with a little more fuel.

I am not real good with EFI and ECU (my bike is carb =P) but I believe the ecu calculates how much air is in the intake manifold and thus corresponds with the correct amount of fuel. And I think the O2 sensor (obviously) tells how much oxygen is in the exhaust and that correlates to how much air as well.

The Throttle Position Sensor just measures how much the intake valve is open so itprobably doesnt apply in your case and question

but you should really find someone who has done the KN swap and seen if there is any hesitation or roughness in the bike before and after. As you know too much air can cause hesitation when snapping throttle quickly. However, in your case the difference in amount of air will be too small to notice.

SO YOUR GOOD! =P

 

thanks japan, yer right , i forgot the basics of FI, those sensors do have every thing to do with this...... peace

 

Hey I looked into it more and found that your factory stock ECU has smaller parameters to compensate for changes. It is kinda like a range in which it can freely make changes by itself for more air, advanced timing, etc (auto tune). These ranges are fixed due to EPA emission standards and simply because it works great for that STOCK bike.

They do have a tighter limit in the amount of air change they can compensate for(compared to aftermarket ECUs) but like you said: the KN will not make much difference and thus the stock ECU parameters, however small, will be enough to make up for more air.

haha now if you TURBOED it....your stock ecu will try to trim (try to compensate) for more air but it can only trim so much.


but honestly this is my best educated guess =P I wish there was a tuner on this forum to kinda teach us