Tuning carbs with dyno?

[rapidray]

If your "mechanic" can't tune without an o2 sensor, you need to find a NEW mechanic! Preferably, an older guy that has experience with CARBURETORS instead of some MMI tech that doesn't know how to tune a carbureted bike. There is absolutely NO reason to put bungs in your header other than he doesn't know how to tune without the gauges! Ray.

[quexpress]

Here is a link to Innovate Motorsports. http://www.innovatemotorsports.com/products/lm2.php

I purchased a LM1 several years ago, which is now obsolete, but next Gen is the LM2.

A basic LM2 Kit is all you really need for data logging AFR, $349 off their site, but they can be found for a little less. Then there are accessories if desired, but not really needed.

I have a LM1, and a LMA2, which connects to the LM1. For the LMA2 I have a RPM clamp, thermocouple for CHT, a string pot for TPS, and a speed sensor for MPH (magnet split collar type). Use it to tune the bike, but then I take it all off after I'm done.

Also have a LC1 with DB gauge (digital), but it can't record any data. They run around $200.

http://www.summitracing.com/parts/INN-3795/

Thank you!
Does this LM1 or LM2 require you to weld threaded insert in each pipe?

[hampshirehog]

Interesting project to do for fun but, as Ray says above, completely unnecessary to tune your carbs in. Please also note I am not an 'older guy' as hinted at by Ray. He might be but I'm not....

[posplayr]

having tuned with an O2 sensor, unless you have a whole bunch of experience and are working on a known configuration you would be hard pressed to do as well without it, or at least save a whole lot of time using the O2 sensor.

http://www.thegsresources.com/_forum/showthread.php?t=161402&highlight=EGT

here is a pic of a sniffer; I have one functionally the same but not sure where a pic is at the moment.

http://www.thegsresources.com/_forum/showthread.php?t=161402&highlight=EGT

[Graham]

We used to install rivet-nuts on header system to hookup an EGA for emissions not AFR gauge. But that was a factory dealership in the 80s and we had to set the emissions. The only reason we used a rivet-nut on each exhaust header is for fine-tuning the mixture screws but the other jets could be set with the sniffer at the end of the muffler. It’s been 23 years since I did that and I’m not up to date on emissions laws or even if an o2 sensor will read at the end of the pipe. I just jet by ear and do plug chops now. Like rapidray pointed out the new techs haven’t been trained to jet carbs without using a machine or even how to clean a carb that hasn’t seen gas in 3 years.