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Old 11-14-2013, 10:31 AM   #1
RedArrow OP
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The Honda Aero 125 Thread

Hi, everyone.

I am starting this thread because I just purchased a 1984 Honda Aero NH125 scooter, and there didn't seem to be any other place catering to these rare, old 2-stroke bikes. As you may or may not know, Honda only imported them into the North American market for one year, and then dropped them in favor of the Elite.

The first time I ever saw one was when my daughter brought a gold one home last summer; she let me take it for a spin around the block and I fell in love with it immediately. It fit my 5' 4" height perfectly and it has that low center of gravity that made it feel really stable while being zippy and fun to ride.

I was determined to get one for myself, but only then realized how relatively rare they are. But after a short time, my bf was able to locate a red one (they only came in two colors that year: red and gold) on CL located not too far from our house — so the next day we went in our Montero to go pick it up.



How do you like it so far?

Here's the dash. Love that retro 80's vibe!!!!



Here she is all wrapped up in the Montero, headed to the beloved DMV for VIN verification. The scooter was licensed with Washington plates and had a problematic pink slip (but that's another story) and so the People's Republic of California had to make certain that nothing was amiss. What we do for love!



In the following weeks I'll be updating this thread as I iron out some of the mechanical problems that naturally come with adopting a 30 year old bike. These include mounting new tires, fixing a rough idle on the carb, and de-uglifying the torn seat. I'd love any input from you fellow inmates, particularly owners of Aeros or similar bikes of the same era. I'll be in the garage.
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RedArrow screwed with this post 11-14-2013 at 10:48 AM
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Old 11-14-2013, 11:10 AM   #2
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Quote:
Originally Posted by RedArrow View Post
purchased a 1984 Honda Aero NH125 scooter, and there didn't seem to be any other place catering to these rare, old 2-stroke bikes
Motor Scooter Guide forum . . downloads.
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Old 11-14-2013, 11:13 AM   #3
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Nice scooter. In my opinion, 12k miles is pretty high for a 2 stroke engine. You might think of doing major service to it soon. Including a new belt, all filters and a new top end on your engine. Check the brakes and tires too.

I see you have a trailer hitch already. If you bought a cheap scooter carrier for under $100 you wouldn't have to mess around transporting your baby like that. Check craigslist in your area. There's always a few on there.

I just picked up an aero 80. I'd love to find a 125!

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Old 11-14-2013, 11:24 AM   #4
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Sweet!

Good luck with it!

Welcome too!
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Old 11-14-2013, 11:36 AM   #5
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tortoise ~

Thanks for the info on the scooter site; I'll check it out. My comment referred to the ADVrider site as far as finding an existing thread, but any info is greatly appreciated.

herman ~

I gotta say I love those new New York license plates. Just saw one out here in California recently and thought it looked like ours did back in the 1930s. Cool.

Your bike looks nice, too. A trailer would be a great idea instead of doing it Jed Clampett-style like a hick, but being Scottish I was able to save the $14.95 for renting one from U-Haul.

Does your scooter have a kick-start, and is the separate oil tank installed? Some PO decided to do a lobotomy on my scoot and removed the oil tank, forcing me to mix the oil and gas in a can and pouring this mixture into the gas tank directly. The oil nib on the carb has been closed off (That dull yellow thing just left of the intake mounting bracket) and I'm wondering if larger jets should be installed to accommodate this non-factory "upgrade?"



How many miles on your beast?
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RedArrow screwed with this post 11-14-2013 at 11:43 AM
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Old 11-14-2013, 12:40 PM   #6
klx250sfguy
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I bought an 85 Aero 80 last fall for $400. It had less than 1000 kms on it. It needed a new battery and a new front tire.

Look at the dry rot: (before)



New tire (after) … cost about $35



I loved my Aero - it was comfy, zippy, had a great putt-putt sound, was cheap to insure. Parts were easily sourced at my local Honda dealer and reasonably priced. Over the winter my buddy and I pulled the carb and gave it a good ultrasonic cleaning. It ran really well. Started getting noisy though. A little investigating and I discovered the nuts holding the exhaust to the engine were rattled loose. Replaced and tightened and the noise disappeared.

Bottomline: great scoot. I liked it as much, if not more, than the 85 250 Elite I had. I ended up selling the Aero due to having too many bikes. I sold it for $800 so I managed a profit but if I had my time back I would have made space and kept it. I really regret selling it. Yours is a nice, clean looking unit. Too bad the oil reservoir was removed. What a PITA having to do the mixing. I suppose you can do up a big container and just draw from it when needed. I'd be pissed about that. Ah well.

Keep us posted. I love old Honda scoots.

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Old 11-14-2013, 02:23 PM   #7
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redarrow my 80 has only 140 miles. It wasn't ridden much! LOL.
It does have a kick starter & it still has the oil tank so mixing gas and oil isn't necessary. I'm sure you can find the parts you need to bring it back to stock condition. People get scared that the oil pump might stop working and the oil starved engine will sieze. I've heard of many overly paranoid people doing this and always shake my head wondering why they'd make life more difficult and their scootering LESS fun by mixing the gas and oil.

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Old 11-14-2013, 06:08 PM   #8
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KLX250 ~ Thanks for writing. Sounds like you had a great bike. I wish I could walk into my local Honda dealer and find walls of parts. I guess that's what I get for falling for a one-year import. I don't know what's exchangeable between the Aero 80 and the 125, or the Aero, the Elite and the Spacy, for that matter.

Yeah, they're cheap. Mine was $550 and my daughter got her's for $600. It still amazes me that such a cool scoot is so affordable. Did yours run poorly at idle before you cleaned the carb because that's where I'm at now.

Maybe you can pick up another one some day...

Herman ~

Wow, 140 miles! How did that happen? It must have sat for quite a while. How does it run? It sure looks nice. These are really fun bikes when they are tuned properly. Keep me posted on what you do to it.


Carb update.

First of all, I spent the day removing and cleaning my carb, which is a Keihin PB02B with a 18mm venturi. Naturally, it took five times the time I thought it would because I wasn't sure how much pressure it took to yank the carb out of the airbox, dealing with 30 year old rubber and plastic parts. The PO had complained about stalling out during deceleration and even gave me a work invoice from a repair shop that replaced an o-ring at the intake housing but failed to list anything else that actually solved the problem.

The Aero ran great at full throttle, but wouldn't really hold an idle past a minute before committing hari-kari, scooter style. I played with both the mixture and idle screws but still no joy, so it was time to dive in and do the inevitable carb cleaning boogie. When removing the carb I also found the air cleaner dirty, so now I've got to deal with that as well as the carb.

Everything went fine taking the carb apart and I was happy to discover that the main jet was the proper size (#105) for standard elevation. For those of you who live in the mountains, you need a #100. A sticker warning about this is under my dashboard next to another one asking us all to respect nature and always wear a helmet. Right on, Honda!

But as I removed the fuel bowl I saw that the o-ring looked like it had seen better days, and even though it hadn't been leaking, I didn't want to risk it, so it was off to the local parts store to try and find a replacement while my jets soaked in a toxic stew.

I'll post some pictures tomorrow and can't wait to see if a clean carb & air filter solves my idling problems.

~ Tootles


New day. Haven't put the carb back on yet, but got it all cleaned up. I have to go up to the city today to earn some bucks so I can afford to reupholster my seat. So I'll leave you with a reminder that everyone thinks their ride is the best one. This is my daughter on her 1984 Aero 125. She almost bit my head off when I told her that I bought the same bike LOL. Kids...

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RedArrow screwed with this post 11-15-2013 at 09:25 AM
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Old 11-15-2013, 09:40 PM   #9
klx250sfguy
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I'd love to pick up another Aero some day.

The one I had idled fine before the carb was cleaned. It was leaking if I recall correctly.

I'm not sure about the interchangeability between the 80 and 125.

Here are a couple pics of my disassembled carb (if it helps):




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Old 11-15-2013, 09:41 PM   #10
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Thee Aero 125 is a wonderful old scooter. I just love 2 strokes. Well designed, but as you said, very rare. And there lies it's biggest problem. Lack of parts. Here is a good place to get what new parts are still available.

http://www.cheapcycleparts.com/oempa...-nh125-a-parts
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Old 11-15-2013, 10:07 PM   #11
klx250sfguy
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Originally Posted by RedArrow View Post

Here she is all wrapped up in the Montero, headed to the beloved DMV for VIN verification. The scooter was licensed with Washington plates and had a problematic pink slip (but that's another story) and so the People's Republic of California had to make certain that nothing was amiss. What we do for love!


RedArrow, your picture reminds me of times I've stuffed a new-to-me scoot in the back of my van.

This is one of two C70's I bought last year.





The smile of a guy who just scored a great deal on a vintage Honda.



My daughter was the first to check it out when I got it home.




This is another scoot I stuffed into my van recently: a used Honda Ruckus ... scooped up for $700. Seen in the second photo next to my beloved Miata :)





And here is the Aero in the back of the van.



My Aero came with a genuine Honda top case (wired with an additional brake light that worked) and a genuine Honda windshield that I eventually removed because I love the wind in my face. Man I miss that scoot.


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Old 11-16-2013, 11:19 AM   #12
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Wow. Great responses, everyone. I'm still trying to figure out how to answer everyone that makes sense LOL.

JerryH ~ Thanks for the link. Maybe they can source me some needed things. I love 2strokes too

JerseyBiker ~ Your welcome is welcomed. Hope you lurk back.

Klx250 ~ Great photos. Beautiful burgundy scoot! Now I don't feel so bad trying to save a few bucks by not renting a trailer. Maybe we should start a thread on Jed Clampett Bike Moving Photos we have a great start already. (I wouldn't want to try this with a Harley, tho.)

My tires aren't quite as bad as yours were, but the back one does need replacing so I went ahead and ordered two new Michelin Reinforced S83s and some tire spoons so when they arrive I'll have that little task to look forward to. Should be fun.

When I took my carb off, I realized that the air cleaner foam was hanging on by a thread and I'm afraid that if I try to remove it to clean it, it'll tear apart completely and the stupid thing is no longer in the Honda system. I'm considering getting some foam and making my own using hot glue. Any one know if this works or not?

So here's my carb with the bowl removed, showing the main jet, slow jet and the float. I was concerned that the main jet was the smaller high altitude one which would make everything run to lean. Super bad juju for a 2 stroke.



Jets soaking in old cat bowl. The bowl's old, not the cat. Good news is that some of those tiny holes were completely clogged and YIPPY the main jet (the little guy in the middle) was the right size (#105) for where I live, where I can gaze at the Pacific from my front porch.



But the scooter gods giveth and they taketh away. I found the o-ring that seals the lower bowl was pretty gnarley. Here's the offending part, along with its replacement more Frankensteining ahead to make my scoot road-worthy.



Bring on the Krazy Glue...



Let's hope it works, LOL.



Presto! Here's the carb back together, clean and better than new (knock on wood) and ready to be reinstalled.



As you can see, the limiter at some point in time had been removed from the mixture screw on the left (Idle speed is the one on the right). Before disassembly, I'd seated both and then turned them out 1 & half turns to get a starting point for setting them once I get the darned thing fired up, which will happen once I get the air filter element situation rectified. One thing seems to lead to another on these things unless you happen to be lucky enough to find one with only 140 miles on it.

I still can't believe that in this age of ebay and Antiques Road Show that stories like that are even possible. That should give us all hope.

~ Tootles
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Old 11-17-2013, 07:20 AM   #13
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Thanks everyone for posting. My full reply along with my carb rebuild photos are awaiting clearance by higher authorities.

Meanwhile, keep those great posts coming.
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Old 11-17-2013, 11:22 AM   #14
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Sounds like you've got some fun ahead of you! The Honda scooters from the 80's are my favorite, and they can keep you moving for years with some maintenance. You can check with Jack Stanley at jack@jacksscootershop.com for parts and you certainly can get some info at his website. He's close by, somewhere in the San Jose area.

Also, there is info to be had, and a fair amount of young male posturing, at www.hondaspree.net which is really a website for any 2 cycle Honda machines.

Welcome to the world of old Honda scooters. You'll wonder why there aren't thousands of them running around.
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Old 11-18-2013, 08:57 AM   #15
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Wentwest ~

Agreed. These old Honda scooters are the greatest!!!

Thanks for sharing those links. Super helpful, especially considering the lack of scooter shops here in Santa Cruz. You would think, being a college town, that there would be one on every corner, but no. According to the old timers, there used to be some, but they've all folded for one reason or another. We're lousy with surf shops and bike shops, but only so far we've found this one guy named Wayne who runs Cycle Revolution (I'm not affiliated ) who kindly let us go through a box of O-rings in order to find a replacement for my carb bowl along with the tip about the Krazy Glue. He didn't charge us for it, either.

It's such a cool thing how this hobby brings you in touch with so many great people who are willing to help each other, profit aside. Everyone take a bow.

I got the air filter sorted out, which was in better condition than I had first thought. I'll post pics soon, and hopefully I can get her back together and running today to see if cleaning the carb actually accomplished anything. Keep your fingers crossed.
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