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Sudco sells carburetors for racing. If you want a nice looking plug that stays cleaner with the current jetting either use a warmer running plug or ride a lot faster. I could talk about AFR and tuning, but don't own a Commando anymore so I'm already asking for trouble here. lol

Says "racing u.s.a" in script in the blue section of that decal. That is on my 34mm Mikuni pair I don't use.

Correct in that those AFR numbers you found are good for modern pump gas in a V8, but they are also good for a lot of other things. My Mikuni jetting is not the same as yours for the set of twin 34mm Mikuni carburetors I had on a 750 with a ported head, 2 into 1 exhaust, and 2S cam in it. My "wrong bike" would lift the front end under power without pulling up on the handlebars. I did not do wheelies on it. Not my thing. It only did that when pulling out into traffic and I needed to get out of the way. Just a little 3 inch lift.

I'm sharing thoughts based on experience and not disagreeing with anyone.

<blockquote data-quote="Schwany" data-source="post: 623498" data-attributes="member: 10834">Sudco sells carburetors for racing. If you want a nice looking plug that stays cleaner with the current jetting either use a warmer running plug or ride a lot faster. I could talk about AFR and tuning, but don&#039;t own a Commando anymore so I&#039;m already asking for trouble here. lolSays &quot;racing u.s.a&quot; in script in the blue section of that decal. That is on my 34mm Mikuni pair I don&#039;t use.<img src="http://www.schwany.com/p11norton/6557ss2.jpg" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />Correct in that those AFR numbers you found are good for modern pump gas in a V8, but they are also good for a lot of other things. My Mikuni jetting is not the same as yours for the set of twin 34mm Mikuni carburetors I had on a 750 with a ported head, 2 into 1 exhaust, and 2S cam in it. My &quot;wrong bike&quot; would lift the front end under power without pulling up on the handlebars. I did not do wheelies on it. Not my thing. It only did that when pulling out into traffic and I needed to get out of the way. Just a little 3 inch lift.I&#039;m sharing thoughts based on experience and not disagreeing with anyone.</blockquote>

[QUOTE="Schwany, post: 623498, member: 10834"] Sudco sells carburetors for racing. If you want a nice looking plug that stays cleaner with the current jetting either use a warmer running plug or ride a lot faster. I could talk about AFR and tuning, but don't own a Commando anymore so I'm already asking for trouble here. lol Says "racing u.s.a" in script in the blue section of that decal. That is on my 34mm Mikuni pair I don't use. [IMG]http://www.schwany.com/p11norton/6557ss2.jpg[/IMG] Correct in that those AFR numbers you found are good for modern pump gas in a V8, but they are also good for a lot of other things. My Mikuni jetting is not the same as yours for the set of twin 34mm Mikuni carburetors I had on a 750 with a ported head, 2 into 1 exhaust, and 2S cam in it. My "wrong bike" would lift the front end under power without pulling up on the handlebars. I did not do wheelies on it. Not my thing. It only did that when pulling out into traffic and I needed to get out of the way. Just a little 3 inch lift. I'm sharing thoughts based on experience and not disagreeing with anyone. [/QUOTE]