OMR: Emission Tester AVI Clip.....

Hey all,

Well figured out a cool little tester for AZ Emissions and registration for my KZ900 and future KZ's...

If you all remember, I was dicking around with a home made AFR unit of my design that was basically a mid exhaust AFR tester during rides... Worked fairly well but a PITA to have to install use....

Last week I had to get the old girl through emissions and now that jetting was all accomplished, I didn't tweak the slow jets (Keihin for pilots) way lean for idle and 1500rpm emission testing....

Wanted to see exactly where she stood... Figured if I failed, drive her out of the bay, tweak the slow jets lean and go through as accomplished last year... Here's the kicker, last year was 2 up (richer) on the mains and slow jets and had the YY8 richer needle in place....

As can be review in the lower left of the image, actual image of PASS-PASS...

Now here's the real kick in the nadolas.... While driving him thought to myself... Hey dumbass, take some measurements with the AFR meter and keep for next year and upcoming project bikes... This way you'll know without a doubt if rich or lean for operations & emissions. DOH!

And yes, I do talk to myself that way as well.... :blush: :laugh:

Simple break down...
Amplifier is designed with Stoich reference voltage and the BOSCH sensor voltage fed into a voltage subtraction/comparator circuit and displays the results in DC Voltage in the display...

As mentioned in the clip, great for emissions but due to engine build, higher compressions thus engine runs hotter and AZ heat index I want it at ~ 13.8 AFR for cooling effect BUT Max Power.... :woohoo:

As can be reviewed in the clip, @ idle 1200 4.5-4.6 Vdc
@ 1500 rpm, 4.74 Vdc....

All in all, places me ~ where I want t0 be in the AFR measurement for Max Power & Emissions....

AVI clip....


OMR

AFR Graphs...
Miss spoke in the clip... Stoich is right at 3.6Vdc as depicted in the right hand side graph.......

eeeeeeeeeeeeeeeek hes talking tek-no again,save yourselves boys! :woohoo:

OK, now before some of you go... Hey, this isn't accurate to the idle graph blah-blah-blah....

Keep in mind, I can always change the reference voltage in my circuit to dial this in and most likely will do so coming up... As mentioned, I'm on the Rich side where I prefer...

What I am using this as a NO LOAD test at various rpm ranges for comparing...

Example, here's some further rpm range measurements....

Probably need one of these. :lol:

Good Fortune!

[Click on image to hear verbal instructions from KZCSI]

i do that too sometimes...talk a bunch of giberish and see if folks can tell i'm really calling em names...

oh and i don't apprieciate what you called me either

PLUMMEN wrote:

eeeeeeeeeeeeeeeek hes talking tek-no again,save yourselves boys! :woohoo:

lol.....us neanderthalls use ear sounds....some of us high faluttin" sapien types use gauges.....:laugh:

trianglelaguna wrote:

i do that too sometimes...talk a bunch of giberish and see if folks can tell i'm really calling em names...

oh and i don't apprieciate what you called me either

you ll get over it 6311.....:blink:

Damn it... just thought of something I should have tested...

Now that I have these measurements at present setting, as mentioned, tweak the slow jets more lean ~ 1/4 turn CCW and re-measure....

Unfortunately packing for a business trip for the rest of the week... Already put everything including bike away....

Will have to test when I get back....

OMR

did you stay up all nite and break the secret code....billy bob...



keith1 wrote:

trianglelaguna wrote:

i do that too sometimes...talk a bunch of giberish and see if folks can tell i'm really calling em names...

oh and i don't apprieciate what you called me either

you ll get over it 6311.....:blink:

My method of testing the emissions is a little more straightforward and only requires a stopwatch and a helper (my wife). I start the bike up in the garage with the windows and doors shut and sealed with duct tape. My wife watches through the window and using the stop watch times how long it takes me to pass out. If I keel over in 10 minutes or less the bike is running too rich and when (if) I regain consciousness I need to lean out the mixture. If I can stay on my feet for 15 minutes without exhibiting any obvious signs of hallucinating the mixture is just about right. My wife and her friend invented this method, and except for the fact that she and her friend tend to forget to come to my aid, it usually works pretty well. Ed

^^^^^^^^^Thats an easy method. I think I have everything i need to do that test. I may not go till I pass out, but at least a little light headed. Thanks for the tip Ed.