Where is the low and high speed adjust screws on Buddy 125?

gumby77 · Post by **gumby77** » Thu Nov 11, 2010 10:48 pm

I have done searches and found a little information, but nothing that says or has a picture that shows where the low and high screws are. I was trying to adjust what I thought was the idle mixture screw and it didn't have much affect on idle speed. (I am talking the mixture adjustment not the speed adjust screw.) I am afraid I might have turned the main adjustment but I am not sure.

Is there any way someone can post pics and method of access for the two screws.

ScooterTrash · Post by **ScooterTrash** » Thu Nov 11, 2010 11:12 pm

There is only the main air fuel adjuster and the idle adjust screw. If you can't find the you shouldn't mess with them honestly. The idle adjust is on the top of the throttle assembly on the carb

gumby77 · Post by **gumby77** » Thu Nov 11, 2010 11:21 pm

I stated I was not looking for the idle speed adjust and I am looking for the mixture. I don't agree with you that I shouldn't mess with it just because I am having trouble identifying which is the H or L. Most carbs label them so there is no confusion. I did anticipate your comment but I didn't think it would be the first comment.

Kaos · Post by **Kaos** » Fri Nov 12, 2010 12:46 am

gumby77 wrote:I stated I was not looking for the idle speed adjust and I am looking for the mixture. I don't agree with you that I shouldn't mess with it just because I am having trouble identifying which is the H or L. Most carbs label them so there is no confusion. I did anticipate your comment but I didn't think it would be the first comment.

There are no 'high' or 'low' adjusters. There is only an idle mixture screw. Its on the left side of the bike low on the carburetor. Depending on the year of your bike, you may need a special tool to adjust it.

gumby77 · Post by **gumby77** » Fri Nov 12, 2010 12:57 am

Ahh well that is why I was confused. Thanks.

gumby77 · Post by **gumby77** » Fri Nov 12, 2010 1:14 am

ScooterTrash wrote:There is only the main air fuel adjuster and the idle adjust screw. If you can't find the you shouldn't mess with them honestly. The idle adjust is on the top of the throttle assembly on the carb

Sorry for the attitude earlier ScooterTrash, I was just frustrated by the lack of good exploded diagrams for the Buddy 125 carb. Didn't mean to take it out on you, I know you were just trying to keep me from potentially doing harm to the scoot.

Hope you can forgive me. I have had a beer now and am happy.

ScooterTrash · Post by **ScooterTrash** » Fri Nov 12, 2010 4:48 am

gumby77 wrote:
ScooterTrash wrote:There is only the main air fuel adjuster and the idle adjust screw. If you can't find the you shouldn't mess with them honestly. The idle adjust is on the top of the throttle assembly on the carb
Sorry for the attitude earlier ScooterTrash, I was just frustrated by the lack of good exploded diagrams for the Buddy 125 carb. Didn't mean to take it out on you, I know you were just trying to keep me from potentially doing harm to the scoot.

Hope you can forgive me. I have had a beer now and am happy.

haha, I was posting from my mobile so I didn't read it too well. There have been a lot of people around here who shouldn't be messing with the tuning so its a reaction. I'm a scoot mechanic so I see a lot of botched attempts at "fixing" idle problems.

Kaos is a bit more patient than I

Also when adjusting I hardly noticed a variance in idle other than running or bogged out completely. Could be my elevation though. best way to tell is how it reacts on decell after blipping the throttle

Post by **ericalm** » Fri Nov 12, 2010 5:11 am

Have you downloaded the Service Manual? See pages 77-78. There's a vertical diagram showing the placement of what you're looking for.
PDF: http://modernbuddy.com/pdf/buddy125_service_manual.pdf

This is the idle, not air/fuel mix screw.

Bcon · Post by **Bcon** » Fri Nov 12, 2010 5:30 pm

<<Also when adjusting I hardly noticed a variance in idle other than running or bogged out completely. Could be my elevation though. best way to tell is how it reacts on decell after blipping the throttle>>

I don't think it's your elevation, I have the same experience at 700ft. I've found that this carb takes more to get the idle mixture right than the normal method of adjusting until the idle drops/stalls to define the lean and rich limits.

ScooterTrash · Post by **ScooterTrash** » Sat Nov 13, 2010 12:54 am

Good to know it's not just me

125cclemon · Post by **125cclemon** » Sat Aug 29, 2015 7:00 pm

ericalm wrote:Have you downloaded the Service Manual? See pages 77-78. There's a vertical diagram showing the placement of what you're looking for.
PDF: http://modernbuddy.com/pdf/buddy125_service_manual.pdf

This is the idle, not air/fuel mix screw.

So where is the air/fuel screw in this pic?

babblefish · Post by **babblefish** » Sat Aug 29, 2015 8:22 pm

The idle mixture screw is right below that metal bump thing that the red arrow is pointing to. Not underneath that bump, but between it and the engine. Also, on this carb the screw adjusts the amount of fuel, not air so turning it clockwise leans the mixture. The head of the adjustment screw is a slot so you can use a regular slotted screwdriver.

babblefish · Post by **babblefish** » Sun Aug 30, 2015 1:26 am

Maybe this will make the location more clear.

PNWbuddy · Post by **PNWbuddy** » Wed May 29, 2019 3:20 am

babblefish wrote:The idle mixture screw is right below that metal bump thing that the red arrow is pointing to. Not underneath that bump, but between it and the engine. Also, on this carb the screw adjusts the amount of fuel, not air so turning it clockwise leans the mixture. The head of the adjustment screw is a slot so you can use a regular slotted screwdriver.

babblefish · Post by **babblefish** » Wed May 29, 2019 4:43 am

PNWbuddy wrote:
babblefish wrote:The idle mixture screw is right below that metal bump thing that the red arrow is pointing to. Not underneath that bump, but between it and the engine. Also, on this carb the screw adjusts the amount of fuel, not air so turning it clockwise leans the mixture. The head of the adjustment screw is a slot so you can use a regular slotted screwdriver.

I found this which might be helpful:

http://www.chuckuslife.com/adjusting-airfuel-mixture/