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tuning carbs
Posted: Mon Dec 10, 2012 3:12 am
by FullRace808
Aloha,
I been wondering on whats the concept on tuning a carb. I got a 28 oko by the way
Like how do i know if the pilot and main jets are too big or to small?
Mahalos for your time
Re: tunning carbs
Posted: Tue Dec 11, 2012 10:06 am
by patthesoundguy
It takes a bunch of trial and error. First tell every one what your setup is besides the carb, what scooter its on and what motor and what size and if there are any mods. That way if someone has a similar setup you can at least get a starting point. Get yourself a cylinder head temp gauge, if don't already have one. And get a bunch of new plugs you will need them for plug chops.
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Re: tunning carbs
Posted: Tue Dec 11, 2012 10:14 am
by patthesoundguy
Oh one way way to know if the main jet is too small is a seized cylinder
sorry I had to be cheeky
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Re: tunning carbs
Posted: Tue Dec 11, 2012 11:28 am
by dun rite
Re: tuning carbs
Posted: Tue Dec 11, 2012 2:27 pm
by Wheelman-111
Greetings:
Nice article (and breathy French singer is very soothing) DunRite. But a guy named FullRace808 can't be bothered with all that pesky reeading, can he?
Take my advice oh-eight. Don't think about it. Save time for riding. Just screw in a 50/140 combo and whatever jet needle came with your carb. Don't worry about scooter's make, model, displacement, compression ratio, intake manifold, pipe, riding style, altitude and air filter. I'm almost certain that nothing bad will happen to your cylinder.
Re: tuning carbs
Posted: Tue Dec 11, 2012 3:38 pm
by knucks
http://scootrs.com/tech.cfm?tip=tunecarb
I read this over and over today, seems like a great source for info
I did get a bit confused on the terms: Air screw in - Less air? Air screw out - more air?
Re: tuning carbs
Posted: Tue Dec 11, 2012 3:42 pm
by kingkamehameha
knucks wrote:http://scootrs.com/tech.cfm?tip=tunecarb
I read this over and over today, seems like a great source for info
I did get a bit confused on the terms: Air screw in - Less air? Air screw out - more air? That's the only thing it controls right, air screw doesn't affect FUEL at all?
Correct. Are you using a cht gauge?
Re: tuning carbs
Posted: Tue Dec 11, 2012 3:43 pm
by knucks
Edited my post but you caught the quote, LOL.
Yeah, I just installed it this past weekend. It's getting cold in Michigan, wrenching/riding season is coming to an end...
What's "normal" idle temps on an Af16?
Re: tuning carbs
Posted: Tue Dec 11, 2012 3:51 pm
by kingkamehameha
Read the jennings articles
Re: tuning carbs
Posted: Tue Dec 11, 2012 3:54 pm
by knucks