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Re: Usually a moped guy, just purchased an Aero 125
Posted: Wed Jun 13, 2012 10:51 pm
by mousewheels
Hmm... that is interesting:
Please pm me with your post. I will try to see what is triggering the spam filter, and get your post into your thread.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Thu Jun 14, 2012 1:30 pm
by mikeosoft
let me try this again.
Bear if I cannot find a dealer close to me if you don't mind it I'd like to get that part. I will pm you in the next few days when I know if i need a replacement or if my return line is clogged/carb issues.
So last night my dad stopped by and decided to help me "clean" the bike as he called it. Always down for an extra hand, I accepted. Before I knew it he had the whole front plastics off, and was repairing a bent cable guide post, cleaning the plastic wheel cover and repairing the fairings where the plastic broke with epoxy and washers. Being a good son, I did what he wanted with limited cursing and arguing.
While i was digging around in the front storage case i found
Also the outside facing threaded bolt hole on the carb was stripped which i took note of when removing the carb to clean earlier in the day. Worried that this was a potential source of future air leakage and piston seizure, I went through my tools and hardware and found a set of metric 6 sized helicoil repairs i had from a goped repair years ago. cleaned out the old threads, and rethreaded. I used some red loctite on the helicoil to keep it from freeing from the carb.
Next thing to do today is crack open the tranny case and take a good look at the belt and rollers, there is some vibrations i am worried about... are vibrations while revving the bike on the kickstand (off the ground, no weight on the tranny) supposed to shake the bike?
The running list of stuff i (might) need so far:
1. Front tire --> what size should i choose?
2. Front brake cable
3. back tire --> bigger than front?
4. petcock
5. motorcycle license
6. tinytach -- ordered, waiting for arrival
7. lightweight rollers?
8. new belt?
9. 105 jet
P.S. Bear i found this aero 125 minty fresh on feebay from washington, i thought you might be interested, incase you don't already know about it:
Item number: 251084677881
Re: Usually a moped guy, just purchased an Aero 125
Posted: Thu Jun 14, 2012 2:44 pm
by Bear45-70
mikeosoft wrote:Bear if I cannot find a dealer close to me if you don't mind it I'd like to get that part. I will pm you in the next few days when I know if i need a replacement or if my return line is clogged/carb issues.
There is no return line because this is a gravity feed fuel system.
The running list of stuff i (might) need so far:
1. Front tire --> what size should i choose?
3.50 X 10 is standard.
2. Front brake cable
No longer Available in the US, maybe one is available in Europe.
3. back tire -->bigger than front?
Front and rear tires are 3.50 X 10 from Honda.
4. petcock
Available from Honda. PETCOCK, AUTOMATIC 16950-KG8-901 (replaces 16950-KG8-003) 001 $43.13
5. motorcycle license
This is between you an the state.
6. tinytach -- ordered, waiting for arrival
Good move.
7. lightweight rollers?
Stock weight is 21.5 grams and they are 20 X 15. This is as close as I've come other than a set of 20.5 gram rollers from Europe. http://www.ebay.com/itm/230805592708?ss ... 1986wt_952
8. new belt?
Belt is NLA and several people are working on a source. Only one of my 125 belts was worn below spec and the variator and clutch pulley were both rusted to cause it.
9. 105 jet
P.S. Bear i found this aero 125 minty fresh on feebay from washington, i thought you might be interested, incase you don't already know about it:
Item number: 251084677881
I don't do the flea-bay bid thing on scooter because every time some morons jack the price to 2 or 3 times what it is worth. Besides his reserve price is too high.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Thu Jun 14, 2012 9:54 pm
by Tate
Yeah I am a moped guy too so don't tell the kids over at Moped Smarmy I am here.
Anything with a 125cc 2 stroke engine is cool in my book.
If you take your bad cable to any motorsports shop worth a d*** you should be able to match it up to something within a couple inches of what you need. A little too long is better than a little too short.
Also the last time I had one of those it had sat so long the the starter motor had gotten stuck.
What I did is pull the spark plug, squirt some amsoil saber 2 cycle oil down there, then turn the engine over by hand via the flywheel.
Then I pulled the starter motor because it was still stuck and I had to separate the two halves and get some electrical cleaner and WD40 in there.
Getting the cup and magnet back together with the magnets and everything in the right place was a hassle but after that the starter worked and they are stupid expensive if you have to replace them.
As for the petcock I can't remember off the top of my head but I think it could be replaced by any old scooter vacuum petcock. I might be mistaken there but if I am right it would be a huge savings over Honda part price.
And if you can't get the starter to work DO NOT I repeat DO NOT tap on it like you would if a car starter wouldn't turn.
I had a kid bring me an Elite 180 where the starter wouldn't turn so he hit it with a little hammer or something, like you do when your car starter is dying.
He had managed to knock the magnets off of the can and they had shattered and got all jammed up in everything.
Good luck with her.
They are bulbous and hideously awesome 80s styling plus they are 125cc 2 strokes which makes them kickass.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Fri Jun 15, 2012 10:14 am
by Bear45-70
Tate wrote:Yeah I am a moped guy too so don't tell the kids over at Moped Smarmy I am here.
Anything with a 125cc 2 stroke engine is cool in my book.
If you take your bad cable to any motorsports shop worth a d*** you should be able to match it up to something within a couple inches of what you need. A little too long is better than a little too short. True, but it needs to be close to the Honda style cable.
Also the last time I had one of those it had sat so long the the starter motor had gotten stuck.
What I did is pull the spark plug, squirt some amsoil saber 2 cycle oil down there, then turn the engine over by hand via the flywheel.
Then I pulled the starter motor because it was still stuck and I had to separate the two halves and get some electrical cleaner and WD40 in there.
Getting the cup and magnet back together with the magnets and everything in the right place was a hassle but after that the starter worked and they are stupid expensive if you have to replace them. Should have just rotated the starter motor shaft, this clears 95% of the stuck starter issues.
As for the petcock I can't remember off the top of my head but I think it could be replaced by any old scooter vacuum petcock. I might be mistaken there but if I am right it would be a huge savings over Honda part price. Wrong, Honda used a least a dozen different petcocks.
And if you can't get the starter to work DO NOT I repeat DO NOT tap on it like you would if a car starter wouldn't turn.
I had a kid bring me an Elite 180 where the starter wouldn't turn so he hit it with a little hammer or something, like you do when your car starter is dying.
He had managed to knock the magnets off of the can and they had shattered and got all jammed up in everything. Anyone who strikes an DC electric motor is a moron and deserves they mess they create.
Good luck with her.
They are bulbous and hideously awesome 80s styling plus they are 125cc 2 strokes which makes them kickass.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Fri Jun 15, 2012 10:28 am
by eliteguy50
Be sure to check ferrule dimensions when matching cables.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Sat Jun 16, 2012 10:36 am
by mikeosoft
hey so i've been doing some searching on different tire brands, likes and dis-likes, and i've narrowed it down to a few brands:
1. Vee Rubber Racing 3.5 x 10 - VRM 228 --
http://www.amazon.com/Scooter-Tire-Vee- ... B003JNYFMO
Supposedly these are the only tires i found that are "rated P" as opposed to "J" which means they can handle speeds up to 94mph not 55 like J
2. Yokohama --
http://scootrs.com/moreinfo.cfm?Product_ID=1067
My dad thinks highly of Yokohama and Toyo as we've had good use out of both brands for my miata, also he's all for a japanese tire on a japanese bike.
3. Kenda Brand Tire Classics --
http://www.trendtimes.com/35x10-4pr-ken ... leproducts
typical kenda tyre
4. Vee VRM 134 --
http://www.ebay.com/itm/3-50-10-Scooter ... 1357wt_955
I like the design of these treads but i have no idea how that translates to better handling and not hydroplaning
I took off the rear brake light housing last night to clean the shells and rejouvinate the black plastics, and noticed a standard 1157 lamp used from the brake tail light... Got me thinking:
LED replacements--
Yes/no? has anyone else done this? I notice when i am idling the headlight is slightly dimmer than when revving higher, would an led lamp set reduce the strain on the battery/alternator and improve the useless headlight luminosity?
Can anyone with some experience recommend a good company to go with, i see there are tons of different quality types and led combinations, e.g. bright white leds, red leds, 37 array, star formations, etc.
Also yesterday I noticed there is a tiny bit of play in the steering column. If I hold my feet against the wheel and twist the handlebar I can move the apart slightly. I have the shop manual here and have identified the stem lock bolt I think I need to tighten. Anyone else have this issue in the past?
Re: Usually a moped guy, just purchased an Aero 125
Posted: Sat Jun 16, 2012 11:10 am
by Bear45-70
mikeosoft wrote:hey so i've been doing some searching on different tire brands, likes and dis-likes, and i've narrowed it down to a few brands:
1. Vee Rubber Racing 3.5 x 10 - VRM 228 --
http://www.amazon.com/Scooter-Tire-Vee- ... B003JNYFMO
Supposedly these are the only tires i found that are "rated P" as opposed to "J" which means they can handle speeds up to 94mph not 55 like J
2. Yokohama --
http://scootrs.com/moreinfo.cfm?Product_ID=1067
My dad thinks highly of Yokohama and Toyo as we've had good use out of both brands for my miata, also he's all for a japanese tire on a japanese bike.
3. Kenda Brand Tire Classics --
http://www.trendtimes.com/35x10-4pr-ken ... leproducts
typical kenda tyre
4. Vee VRM 134 --
http://www.ebay.com/itm/3-50-10-Scooter ... 1357wt_955
I like the design of these treads but i have no idea how that translates to better handling and not hydroplaning
Tires are always the choice of the rider or those paying for them.
I took off the rear brake light housing last night to clean the shells and rejouvinate the black plastics, and noticed a standard 1157 lamp used from the brake tail light... Got me thinking:
1157 is correct
LED replacements--
Yes/no? has anyone else done this? I notice when i am idling the headlight is slightly dimmer than when revving higher, would an led lamp set reduce the strain on the battery/alternator and improve the useless headlight luminosity?
The LED thing has been done and works fine for the tail and brake light but creates problems with the turn signal. The headlight is run by AC from the alternator, not DC from the battery circuit. Low revs, low voltage; high revs, high voltage, this is normal for the headlight.
Can anyone with some experience recommend a good company to go with, i see there are tons of different quality types and led combinations, e.g. bright white leds, red leds, 37 array, star formations, etc.
Also yesterday I noticed there is a tiny bit of play in the steering column. If I hold my feet against the wheel and twist the handlebar I can move the apart slightly. I have the shop manual here and have identified the stem lock bolt I think I need to tighten. Anyone else have this issue in the past?
I have not but it is possible.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Sat Jun 16, 2012 11:47 am
by mikeosoft
Bear thank you for the quick reply I can't believe how lucky i am to have you and the rest of the aero guys here to answer my boring/beginner qualms. I have the seat and panels removed at the moment and am attempting to remove the gas tank to get access to the auto fuel valve to do some testing. I have an air pressure handgrip applicator and meter as per the repair manual's suggestion for checking possible clogged fuel line/feed line issues, but I forsee me needing to remove the auto fuel valve and do some inspecting before deciding if it is repairable or just to replace. In a perfect world I'd like to try and repair the d*** thing.
I appreciate your knowledge, and you are right, the tires are my decision. But seeing as you and the other guys here have been in my shoes before, possibly many times with all your aeros, maybe you have some insight into your favorite tire brand, or maybe you think poorly of a certain brand which i should steer clear of.
I will do some more searching on the web of tire reviews from scooter owners, but again thanks so much for the help and knowledge it really makes a huge difference.

Re: Usually a moped guy, just purchased an Aero 125
Posted: Sat Jun 16, 2012 4:28 pm
by mikeosoft
so i cannot believe the petcock situation...
I have it completely apart, i have the repair manual instructions, and I unscrew the 4 screws. There's a spring applying pressure to push the bladder open at all times. Why would honda do this?
I blow air into the pressure valve in, and it inflates the bladder to overcome the spring's resistance and shut the fuel flow off....
This is exactly the opposite of what the manual says should happen. And clearly the valve needs to be closed until air is SUCKED from the bladder causing it to go down, releasing the seal and allowing fuel to flow...
So what happened to have this spring in the wrong spot??
I sat for 15 minutes to make sure i am not insane and somehow this spring was put in the wrong place and in reverse, thus, under no force, the spring was always pushing against the bladder and fuel was always flowing. Also i cleaned the gunk out of the petcock while i was there.
So what type of mechanic would insert the spring purposely in the wrong spot thus causing fuel to always flow to the bowl, never off. Purposely bypassing the petcock from functioning?
The only answer I can conjure is that the petcock wouldn't open for whatever reason, and a responsible honda mechanic, who in 1985 was well aware of this common issue, decided a fix would be to bypass the auto shutoff, and leave it open, hoping that the float in the bowl would do a good enough seal to keep overflow and leaks.
Either that or a * mechanic, or a mechanic who wanted repeat business and future $$ from an old man who didn't know much about his scooter...
Eitherway I checked the function of the autopetcock and it is working great. off when no pressure is applied. on when pressure is applied.
I urge all of you if you have petcock issues to open your petcock and check out the spring mech, the rubber diaphram has two sides, the spring should be in the bottom section, not the top section as mine was. I don't know wether the factory authorized it or some person accidentally did it, or maybe someone did it to keep fuel flowing... Eitherway, one is on ebay for $44 and is a ripoff. Having opened and cleaned mine, there is no reason it shouldn't last forever. There's not much to it, just an air bladder that has no space to fail, a spring to apply pressure against the bladder, and 3 aluminum sections that should be cleaned of debris.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Sat Jun 16, 2012 5:32 pm
by Bear45-70
That is not how a petcock works. The spring holds the valve closed and when VACUUM not pressure is applied the valve is pulled open. Hence engine off, no fuel, engine cranking on the starter or running, vacuum pulls the valve open.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Sat Jun 16, 2012 6:42 pm
by mikeosoft
Bear45-70 wrote:That is not how a petcock works. The spring holds the valve closed and when VACUUM not pressure is applied the valve is pulled open. Hence engine off, no fuel, engine cranking on the starter or running, vacuum pulls the valve open.
I concur. This was not how the petcock was before I repaired it.
After I switched the spring around, it is functioning as you stated above, how I'm assuming it used to function from Honda when it was built.
Got the bike back together, runs great.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Tue Jun 19, 2012 3:30 am
by mikeosoft
update over the past few days i've been working on a ton.
I noticed per the manual, my battery is missing the latch that holds it from shaking around. So to fix this, I cut up a nylon band I had lying around and a microphone turning bolt to allow me to disconnect the latch without tools. I had a piece of the old plastic latch still there, so I drilled two small holes and riveted the strap to the end. I also cleaned the rusted threads with a tap. years of not being used and acid build up had left rust in the bare metal grooves exposed.
While I was down there, I figured it'd be a good time to remove the engine cover, and check out the compression.
Plug needs cleaning:

Compression test yielded 125psi:
tried it 3 more times with similar results
I didn't add any oil to the cylinder before testing, so maybe that's why it's so low... That plus it is old and the rings might be shot. Either way I will come back to this issue in the future if needed.
Rusty muffler!
Tinytach came in the mail!
Adjusted the idle to 1860/1810
Put the engine area back together and took it for a short ride around the neighborhood. While doing that UPS dropped off a package:

spare front wheel, front break assembly, spare speedo cable, and most importantly used front brake cable
So I got to work removing the front panels to recess the cable properly and test the front brake:

Also lubed up the cable with some of this graphite chalk:
Installed the cable and the bike runs great. Also just before I ordered a pair of Vee VRM 134 tires after doing more research between parellis and Vees, scouring the net i saw people say the Vee 134's stick better and do well in the rain. So i pulled the trigger.
I plan on mounting them myself.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Tue Jun 19, 2012 3:40 am
by zuphilius
Just replace the plug. You'll thank yourself.
Re: Usually a moped guy, just purchased an Aero 125
Posted: Tue Jun 19, 2012 11:31 am
by mikeosoft
replacement is in the mail no worries