Which one is the idle mixture screw?

jbarb · Post by **jbarb** » Wed Mar 08, 2006 11:51 am

Does anyone have a pic showing which is the idle mix screw on a 85 spree? Im having a hard start problem where it takes like 5 minutes of cranking to get it to fire over.

I tried starting fluid and it helped a little but not much. Im going to pull the by starter and check it later today.

MySpree · Post by **MySpree** » Wed Mar 08, 2006 12:07 pm

wait do you want a genereal pic or one showing how it should be?

jbarb · Post by **jbarb** » Wed Mar 08, 2006 4:03 pm

Just a picture of which one it is. I can mess with it from there.

It didnt really say in the PDF service manual. Or maybe I missed it

edwardzx7 · Post by **edwardzx7** » Wed Mar 08, 2006 4:10 pm

dont know which one it is myself but i hope this helps:

jbarb · Post by **jbarb** » Wed Mar 08, 2006 4:18 pm

Thanks. Now someone can point it out and we'll both know.

My brother has a pocket bike that when he got it, it would take like 10 minutes of pulling to get it to start, he played with the idle mix screw and got it to fire off on the first pull every time

Pygmaelion · Post by **Pygmaelion** » Wed Mar 08, 2006 4:20 pm

Okay, that one flathead screw, dead center, that's your idle mix... screw it all the way clockwise (gently, no need to gorrilla it down), then back it out...

On my bike, it's 1 and 1/4 turns... Yours may differ. If you're having trouble keeping track of how many turns you've gone, put a gob of grease on the top of your screwdriver, and count how many times it goes round.

The screw just up and right from there sets the throttle closed position. You can see that it has a little spring over the threads of the screw.
If you screw it all the way in (clockwise), it will hold your throttle wide open. The farther you back it out, the more "closed" it leaves your carb when you're not twisting the throttle. This will also affect your idle rpm... If you screw it all the way in, it's as if you've got your throttle open a third of the way.

jbarb · Post by **jbarb** » Wed Mar 08, 2006 4:32 pm

Awesome. Is there another one for the mix of the main jet?

Pygmaelion · Post by **Pygmaelion** » Wed Mar 08, 2006 4:36 pm

i'm pretty sure that the main jet's spray is controlled by the needle that moves up and down when you twist the throttle... If you need more juice at Wide Open Throttle, you get a bigger jet. Some fine adjustments can be made on some needles by changing which "notch" they sit at inside your slide.