Keihin Main Jets

[Rianna]

I found a sticker on my scoot with the 'odd' numbers on it,  oswaldters. The sticker wasn't on the carb, though, it had been moved. So I guess I won't know for certain until I take a look at it.

[oswaldters]

Yeah, with my luck I've go the odd carb as well.

I hope to find out in the next couple of weeks when I get around to checking it out.

[Rianna]

You'll probably find out before me, oswaldters. I'm not doing much of anything in this 20 degree weather.

[oswaldters]

Well, if it stays this cold then I'll have to think about changing that pilot jet too.

[Rianna]

Well, if you do that, what would you change it to?

[oswaldters]

That's a good question - I'd have to check the size of it now - I think something like a #35 but I'm totally guessing.

[Rianna]

Yeah, the original slow jet is supposed to be a #35...

[oswaldters]

So I might go up a size on that.

But the main jet is the first thing I have to deal with.

[Rianna]

I see. I don't know about where  you're at but it's "supposed" to be in the 40's here tomorrow. I'm really hoping it does.

[oswaldters]

I think high 30s maybe.  

A veritable heatwave, I may have to wear my shorts to ride in.

[Rianna]

Shorts!! Better U than me!!

[Chachivoodoo]

I received the Jets, they were correct, and fit.

I installed a 38 Pilot Jet and a 90 Main Jet.

I adjusted the mixture with the air screw after it was warmed up.

Set the air screw at about 1-1/4 out.

Starts much easier now.

There was a little bit of a stumble in the bike in the midrange until it got warmed up.

Runs fine, looks like i'm all set until the summer comes back, then I'll probably drop the main jet to an 85.

We will see.

[oswaldters]

Glad to hear everything worked out.

Thanks for keeping us updated - this info is helpful in my quest to get my carb working better.

[Rianna]

That's great, Chachivoodoo. Now you're ready to roll!

I'm glad they fit for ya!

[bniesen]

Isn't #85 the stock size, at least that what it says in the manual. Has anyone tried restricting the air flow instead of changing out the jets?? In colder weather air is more dense so if the mixture is too lean then couldn't you just restrict the air flow?

Maybe I'm just stupid.