Aero 125 needs help!!

[Tannera]

.... quick history.... got an 88 Elite, wouldn't stay running, replaced the fuel valve and the bystarter, and it runs like a charm......

I just picked an Aero up about a month ago. I've been tinkering with it, and still can't get it running! It started when I looked at it, but wouldn't stay running. It rode home with me in a trailer for a 3 hour drive, and now it won't even start.

It cranks fine. It holds 100 lbs of compression. The spark appears very weak though. Changed plugs, made sure cap was screwed in, I've even sprayed starter fluid into the carb. Nothing. I've tried swapping some parts from the currently running Elite, but nothing seems to get the Aero to start.

Do you have any ideas??? I know I'm going to replace the fuel valve and most likely the bystarter.... but I'd like to get the darn thing to fire!

Also, if you know of a supplier that has parts, that would be a huge help. I'd like to get this bike running so I can ride it and my grandson can ride the Elite.

[motormike]

I'm drawing a blank at the moment. I own Aero 125 too.
100 #'s psi compression should start and run, plus you said it ran when purchased.
My first thought when you said it won't fire on starting fluid was to check the reeds for damage.
A weak spark is possible cause too...I use a Snap-On spark tester.
Often times spark will not look very good when observed in daylight.
Switching coils for a known-good one is the common and easiest way to eliminate that.
Check inside the airbox for filter. That sucker is no longer available from Honda, but
is easy to fabricate. Still, the thing should start/fire without one.
Every scooter that has been dormant for any time whatsoever will need a carb cleaning.
The bystarter has a well that is integrated into the float bowl, and this well is fed gas from bowl through a teeny hole into the side of that well.
Make sure that hole is open, as well as all the jets and idle/air mixture screw passage.
Carb cleaning is tedious, somewhat technical, and absolutely essential to achieve proper tuning.
Spray cans are useful for verifying the status of the passages once they have been soaked, prodded, and blown fiercely with compressor.
Berryman's Chem Dip is the best I've used in one gallon cans for ~$20
I leave you with those thoughts and wish you good luck...
Edit : parts are mostly NLA from Honda and parts scooters are not easily found.
Place an ad in the Wanted/For Sale on this site is a good source and also http://www.motorscooterguide.net/Forum/index.php
Ebay is what it is, and sometimes you find what you want...beware of scalpers...

[Tannera]

Thanks! I will have to check the reeds. I already tried swapping the coil for the one that works on my Elite. I got a pm from somebody that said the Aero should have compression of 169 psi. If that is the case, I'll prob have to start scouring the web for rings. What do you think?

[swimmingfree]

what gap is on the plug...
swimmingfree

[Tannera]

what gap is on the plug...

Not sure.... I replaced it twice, plus used the one on the ELITE that I know fires.....

[swimmingfree]

the lager the gap the weaker the spark.... i wood try setting it at about 25 ...
swimmingfree

[Tannera]

the lager the gap the weaker the spark.... i wood try setting it at about 25 ...

same results.... bummer....

[swimmingfree]

how dose the spark look ??? is the plug wet or dry???
swimmingfree

[Tannera]

The spark still looks weak, most of the time the plug is wet. LOL

[swimmingfree]

put the plug back in the other bike run the bike is worm up about 5 min... then pull the hot dry plug out put it in the 125 and try it ... if it don't start then pull the plug and see if its wet......
swimmingfree

[Tannera]

It'll be a bit... have to wait for the Elite to return from town ... LOL... I see you are also in MI - we are about 15 mins from the Mac

[swimmingfree]

is that at scooter speed...lol
its nice up there and smell like fug....lol
im in muskegon my self and it just smells here lol
pull the hot pulg and put it in ...thay way you no the plug is dry and redyed to go....
swimmingfree

[Tannera]

LOL, nope, not scooter speed (but it could be if I get this one going!)

OK, put the warm, dry plug in the scoot... does not start. Little spark. Wet when taken out and put back in Elite.

Starting to think it may be the low compression...

[Tannera]

LOL, here's the working one, coming back from town

[swimmingfree]

i if the plug is wet you have flooded the h.e.ll. out of it pull the plug and crank out of it to blow the exter gas out and then let it sit for some time at lest a hour ...then put a worm dry plug it it and try starting it keep hond off the gas.....
swimmingfree