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Using oxygen sensor for carb adjustment.
- car5car
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Parts and tools:
o2 sensor nut (bung?) and plug ($5 from ebay)
o2 sensor Bosch 15511 (about $20)
wires
voltmeter (multitester)
1. Drill a hole and weld o2 sensor nut
2.Install o2 sensor, attach wires and voltmeter next to speedometer. 2 wires go to voltmeter, 2 wires to battery for sensor heater.
Any time you will see rich or lean condition. Below 0.45v is lean, over 0.45 is rich.
That would be probably useful for racers.
After you are done, remove sensor and install plug.
If you attach camera to your chest, you can have a video, showing speed, RPM and rich/lean condition
96 Yamaha Royal Star
82 Yamaha Virago 920
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- floivanus
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Autozone has a $20 simple gauge (narrow band) or the innovate is $120 of so.
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew
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- JaFlo
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I'm amazed that people are still trying to tune carbs by pulling plugs and using their butt dyno.
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- loudhvx
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You need a wideband o2 system to get meaningful data.
By the way, a simple voltmeter does not suffice for any o2 sensor. You need a microcontroller to control the o2 sensor to get proper readings.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
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- loudhvx
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JaFlo wrote: ...
I'm amazed that people are still trying to tune carbs by pulling plugs and using their butt dyno.
If time is money, the butt dyno is a huge waste of money. :laugh:
Did that for years. It takes about 10 time longer than using a wideband, and it's never as precise. With a wideband you can really dial in for power AND fuel economy. They can go together nicely.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
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- car5car
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96 Yamaha Royal Star
82 Yamaha Virago 920
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- loudhvx
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1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- spdygon
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If using a sensor after the merge then that not really tuning each carb.
I look at each plug and then riching or lean it accordingly . Then check temp at each cylinder.
1982 GS1000sz Katana ( #15...17K Miles)
1982 GS1000sz Katana ( # 297....7100k Miles)
1978 Kz1000 Z1R. 10K Miles1
1978 kz1000 z1r 27k miles
1977 KZ 1000 A ( Project ) 54K Miles
1976 Kz900A4 (Red)21K miles
1976 Kz900A4 ( Red)7500 miles
1974 Z1 900 project
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- JaFlo
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It should be noted that the secondary air system should be eliminated or temporarily blocked off before using an O2 sensor to tune.
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- car5car
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I guess you are talking about idle speed mix adjustment, right? It kind of makes sense to run engine at idle, then look at spark plugs. It is not that easy because you have to "unchoke" on time or plugs will get black just because you kept choke on longer than you should have. Or you can warm up motor, then clean plugs and run them at idle.spdygon wrote: My brothers use to tune each carb to each cylinder .
If using a sensor after the merge then that not really tuning each carb.
I look at each plug and then riching or lean it accordingly . Then check temp at each cylinder.
Please explain how you adjust carb checking spark plugs and temperature. Where do you read temperature? Close to spark plug?
Thanks. I like how you do it, it seems to be a smart way to adjust carbs.
96 Yamaha Royal Star
82 Yamaha Virago 920
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- loudhvx
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1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.