UPDATE!!! Aero 125 Problems

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Postby HuskieMobileMan on Tue Mar 18, 2008 7:07 pm

athflying79 wrote:Hmm...didn't think about going at it from the inside. I will take the carb off tomorrow and see what I can do. From what I can see, I haven't damaged the threads just yet, so hopefully I can get it out.
Screw it inwards and take it out from the inside of the carb. I dont think you will be able to back it out. I have an extra screw and spring for ya if you need it.

It will cost you $10+ from honda.
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Postby athflying79 on Tue Mar 18, 2008 7:11 pm

That would be awesome. No matter what definitely gonna gonna need a new screw and spring. I can paypal you some cash. My address is


Wouldn't the spring keep me from being able to thread it into the carb??
Last edited by athflying79 on Tue Mar 18, 2008 7:26 pm, edited 1 time in total.
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Postby HuskieMobileMan on Tue Mar 18, 2008 7:18 pm

I would recommend taking down your name and address. Send it to me in a personal message. :D

Nope, spring keeps tension on the screw.
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1987 Honda Elite SE50
1984 Honda Aero NH80
1984 Honda Aero NH125
2001 Honda CBR600 F4I
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Postby HuskieMobileMan on Tue Mar 18, 2008 7:21 pm

Shoot, screw wont come out through the inside of the carb. Hopefully you can back it out enough so that you can get it from the outside. If you do drill it out, do not go all the way into the carb! Only the nose of the screw sticks out.
2005 Kymco ZX50
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1984 Honda Aero NH80
1984 Honda Aero NH125
2001 Honda CBR600 F4I
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Postby athflying79 on Wed Mar 19, 2008 8:26 am

Well, it just wasn't happening. That screw is seized in there pretty good. The brass is to soft, the pliers just twisted it and broke. I bought a new carb on Ebay and will now have a parts carb. Thanks for all the help and as soon as it gets here she should be 100%.
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Postby oldhonda2 on Wed Mar 19, 2008 12:12 pm

I suggest you keep your bystarter from old carb.

Well, whoever had this scoot before you F'd up things a bit air and idle-wise (how's the rest of the scoot?...makes ya wonder).
There was no need for any of what I'm seeing there. Oh well.

* it can still be rebuilt rather easily if the air screw and seat wasn't ruined

Anyway, i'd say you sure as heck found your source for the idle problems (I hope).
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Postby athflying79 on Wed Mar 19, 2008 12:39 pm

I am gonna keep the old carb and all the parts off it. I'm sure it wouldn't hurt to have a spare. I think what happened was with the low mileage of the scooter it sat around a lot. After sitting for a long time the PO tried to start it and when it wouldn't run, started playing around with carb settings rather than having it cleaned. Oh well, live and learn. I got a new one on the way.
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Postby oldhonda2 on Thu Mar 20, 2008 1:36 pm

In your before and after pics: you didn't mangle it (idle adjust screw), it was F'd well before you got to it with your drill. It wasn't even there.

What i don't get is the air screw, the before pic shows a mangled air screw as well...and the after pic shows a different/normal air screw.
What gives there?

So we should have had you take the pic sooner.
1st lesson is - no drills with carbs/scoots ;) Those are extreme/last ditch efforts if need be. Air tools, wrenches, sockets are ok.

there's no need to take any caps off anything on that carb to make adjustments. You'll see when your new carb comes, your idle screw sticks out, has a flathead screwdriver slot and spring for adjusting, same with the air screw (which may or may not have it's cap over it - yet it will still turn. No drill should ever be used to get that cap off either.
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Postby athflying79 on Fri Mar 21, 2008 5:54 am

For the air screw, there was enough of a nub sticking out that I was able to use needle nose pliers to slowly turn it all the way out. Once I had done that, I cut the nub off with a dremel and put a slot in it so I could adjust it with a screwdriver. I wasn't so lucky with the throttle stop screw, it was recessed way to far in and that is why I assumed it was just a brass cap. I have a service manual with pics, but they are black and white and not the best.
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Postby athflying79 on Mon Apr 07, 2008 11:33 am

Victory!!!!!! So the new carb came in and although it was "new" I guess being 20 years old I shouldn't have expected it to be bright and shiny. It was pretty dusty and a bit of corrosion. Just to be safe, I disassembled and cleaned.

Once seeing the carb the way it should, the old one was definitely mangled. The spring for the idle screw wasn't even there anymore and the screw was seized were it was.

Put it back together and put it on the scoot. After a few seconds of cranking fired right up and what a night and day difference. It just sat there and purred. I let it warm up, adjusted the mixture screw and idle a bit and took it for a test ride. Ran beautifully and the flat spot up top is gone. I can run WOT and it accelerates as it should. I can only guess it was a mixture problem before cause I reused the original throttle cable.

Thanks to everyone for there input and I only hope I contribute in some way down the road. Now it's time to hit 600 miles so it's broken in...haha.
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Postby athflying79 on Mon Apr 07, 2008 12:57 pm

Oh yeah...it also hit an indicated 55. Will have to make a GPS run and see what the actual is.
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Postby Bustin on Mon Apr 07, 2008 1:34 pm

Success at last !

Glad to hear it.

When you say "new" carb , do you mean actual NOS or was it a used on in good shape ?

Just curious if Honda still had NOS carbs on the shelf for those Aero125s.
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Postby athflying79 on Mon Apr 07, 2008 2:04 pm

It was new but not directly from Honda. It was off Ebay and shipped from Thailand I think. It was still all neatly bundled in the Honda packaging, but like I said, very dusty and a bit of corrosion. The bag was sealed pretty good, so I'm thinking moisture in the air just took it's toll after being sealed up for so long. I called a Honda dealer before going through Ebay and it's no longer available. Anyways, I learned a lot about my scooter in the process and she runs great....so I'm happy.
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Postby HuskieMobileMan on Tue Apr 08, 2008 7:16 am

Awesome! I gotta get my 125 up and running now. I just got some new rings from south africa.
2005 Kymco ZX50
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1984 Honda Aero NH80
1984 Honda Aero NH125
2001 Honda CBR600 F4I
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Postby athflying79 on Tue Apr 08, 2008 1:00 pm

I noticed cruising around today the steering wasn't quite centered. I can hold the front wheel between my legs and I get just a tiny bit of free play in the handlebars....as in I can move them just a bit without the wheel moving...is this normal?? On my motorcycle it was most definitely not, but I haven't had all the plastics off to see how everything is put together on the 125 just yet.
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