Mikuni tuning manual?

[Zvoiture]

Does such a thing exist? I have the PHH Service Manual (like, 20 pages) and it has some basic info and blow-ups, but is there somewhere a really good tuning and adjustment and explaination document?

I have been forced to educate myself because the incompetency of others is greater than the depth of my pocket-book.

steve

[jmortensen]

Steve, I used the Mikuni manual and an O2 sensor. O2 sensor was added after about 3 months of screwing with them, and I had it fairly well dialed in a couple weeks after adding it. Definitely the BEST thing you can do to aid tuning triples IMO.

Wideband O2 is the next thing everyone will say, but I did OK with just a standard O2 and a voltmeter.

Our buddy Greg installed an Autometer (I think) fuel mixture gauge with a regular O2 sensor and the guy who dynoed his 510 laughed at him. Then it turned out that the gauge was dead accurate on EVERY pull, and the dyno guy stopped laughing.

I do understand that for turbo apps the wideband O2 is a better idea. Can't remember exactly why. I think its because they run a little richer for a little extra ping resistance and the regular O2 doesn't read well there, but for an NA that should be running somewhere in the high 12's to 13:1 range I think the standard O2 is sufficient.

Jon

[SER240Z]

Jon, can you post somemore info on this o2 sensor thing? I also have triple Solex's and they could use a good tuning. I'd be interested in how you set it up, and how it works.

Thanks

Scott

[jmortensen]

I used a single wire O2 plumbed into the collector with an O2 bung that I bought at the local muffler shop. Then I connected that to a $6 Harbor Freight volt meter and shot for as close as I could get to ~.75 to .8 volts.

[jmortensen]

I should also say that wideband is undoubtedly more accurate, but I had to spend that $400 somewhere else.

Jon

[Zvoiture]

I've never heard of the votlmeter thing, but I guess it stands to reason. You can check your fuel level with a voltmeter, why not your mixture?!?!?

Jon, Greg and I have the same gauge installed, the Summit $30 LED one. They have changed it a bit, Greg's is

(lean)

red

red

yellow

yellow

green

green

(rich)

and mine is

(lean)

red

red

red

red

green

green

green

green

(rich)

Anyone want to comment on EGT in here? I would love to hear the comparisons to A/F readings.

steve