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Old 12-05-2013, 07:36 PM   #91
RedArrow OP
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Hey everyone. I'm riding now. Today I put my new license plates on and I have my permit. I'm trying to get up to 35 mph. Feels great. I love my scooter and I'll post some pictures soon out by the Great Pacific.

I just want to say to all you scoots out there, let's post some pics of you out on your best ride.

Strangely, it's been cold out here the last couple of days, at least by California standards, and wouldn't you know it, my bf's Klim Baja pants showed up today in the mail. Better fit for another season. But this colder weather makes me appreciate my riding gloves and jacket, which before felt bulky and unnecessary. If anyone's done any winter scooter trips, I'd love to hear about that, too. And sister Judy: show me your Vespa!
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Old 12-06-2013, 08:21 AM   #92
DaBinChe
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Go to the DMV youtube website and watch their video on the M1 test.
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Old 12-06-2013, 09:54 AM   #93
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Originally Posted by DaBinChe View Post
Go to the DMV youtube website and watch their video on the M1 test.
OK. Ride On, my brutha...
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Old 12-10-2013, 04:20 PM   #94
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Hey, YamaGeek. Do you have any pictures of this pasteurized scooter? I'd love to see one. Those barn finds are always fun to hear about.

Wouldn't it be great to create an East Coast/West Coast/North South scooter boneyard where people could come once a year to buy and sell old scooters and parts?

Thanks for the support and encouragement. Working on these old bikes isn't for everybody, but for those of us who get it, it sure is fun!

..respective snippy..

I'll be riding and writing in the days ahead. It feels great to be legal. And I'll do my best to avoid the cagers.
Well no I usually was having too much fun riding the darn thing to remember taking pictures. I used to provide a service of such for a serious bicycling friend when I was his Sunday morning pacing-bike for his time trial practice. I'm wondering if he has some photos from those mornings.. "Brrrr..."

We used to do this at Five-early starting in February, I used to use newspaper layered under my jacket to cut the chill. I was younger and dumber then. The local Eugene used moto parts outfit had dozens of C100-C102-C105 Cubs, they had rows of their little cast-iron heads peeking out of stacks of cardboard boxes in their back shelves, But they went out of business in 1990.

Hard to find used bits for C100's nowadays, parts are available but seriously intact bikes not so much, I get comments on it nearly every time I'm in town. Sometime I will rebuild the old 50 cc engine, but it's got some serious internal wear.
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Old 12-10-2013, 08:48 PM   #95
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Yeah, I really like those little bikes a lot. Too bad your local dealer went out of business. I know how that is. Here in Santa Cruz a collage town there isn't one scooter shop to be had. Bikes galore, but no scooter shops or even boneyards to go and find parts from. It's like an island.

While noodling around CL I ran across this ad for what seems to be a pretty decent Aero 125 in Sacramento. The poster is asking $850, and it's tempting to run up there and pick her up myself. After all, these things are rare, fun to ride, and deserve to be saved.

http://sacramento.craigslist.org/mcy/4236914694.html

I went riding today in the sunny coldness that is our current condition and a few blocks for home my battery decided to give up the ghost, so I was forced to coast back home, Luckily, it was all downhill LOL and I have a triple charger, so hopefully, tomorrow, I can start out again and actually get somewhere.

Beauty shots to follow.
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Old 12-12-2013, 09:12 AM   #96
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Beauty shots on hold.

I was taking off with my camera to take some pics of my winter ride when she dies just a few blocks from the garage. So I pushed her home and discovered that the battery was dead. So I hooked up the triple charger and waited for the green light to flash to steady. That done, I started her up and wouldn't you know it, she started with the same bad idling malarkey that I thought I had dealt with weeks ago. So now I'm more or less back to square uno.

So I yanked the carb. Third time. My bf thinks that his application of too much oil on the foam filter may have resulted in mucking up the slow jet, although it didn't look dirty when I examined it. So I'm going to put everything back together, as well as something I probably should have done before yanking the gas tank off, emptying it completely, cleaning the screen and filling it with fresh gas and 2 stroke oil.

I'm still wondering if my problem might be recurring due to the PO removing the separate oil tank, forcing me to mix the gas and oil in one container and then pouring it into the gas tank dirt bike style. This isn't really the way the Honda Aero 125 carb was designed, as the oil was introduced via a pump downstream from the carb directly into the intake manifold. Could the oil gas mixture in the carb be causing problems? Do I need bigger jets? Any ideas on these mysterious subjects greatly appreciated.

At least our current Frozen Tundra conditions have lifted so working out in the garage is fun again. And as soon as I get her up and running, I'll get those beauty shots for sure.

Stay tuned...
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Old 12-12-2013, 01:13 PM   #97
JerryH
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I have removed the oil injection from a number of bikes and ran premix with no problems. I don't trust old oil injection systems with rotted hoses etc. If the hoses are bad you don't know what else might be. I run 40:1 in everything. Scooters dirtbikes, mopeds, chainsaws, weed eaters, etc.

I don't see any way oil from the filter could plug up a jet, oil is soluble in gas. You did mention something about using some kind of special air filter oil, but it should also be soluble in gas.

A 2 stroke engine will not need bigger jets from switching from oil injection to premix. There is not enough oil in the gas to make a difference. However, 2 strokes are very finicky about the air/fuel mixture. If it is a little bit too lean as could be caused by a partially plugged jet, they can run hot and seize. I destroyed the top end on an old dirt bike that way. It had been stored for some time, and I did not clean the carb like I should have. It idled fine, but misfired at higher speed. I was hoping fresh gas would clean out the jet. I ran it wide open for about 1/4 mile, and it seized up solid.
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Old 12-12-2013, 01:23 PM   #98
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If the oil injection has been removed then yes you will be running a bit lean. Just from the simple fact that you are now displacing some of the fuel with said oil. Chances are you are getting more oil than was originally required as well.

If you can, get the oil injection working again the way the engineers intended. All of that r&d time and money was not invested so some sap who knows better and is worried can remove it and have inferior function from original intention.
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Old 12-12-2013, 02:01 PM   #99
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Unfortunately it is probably not possible to repair/replace the oil injection system, as almost no parts are still available for it. If you did mix too much oil in the premix, check the spark plug. It may have become fouled by excess oil.

The stock main jet is a #105, pilot is #40. These are the oem sizes. They are still available new, but I cannot find any other sizes for that carb.

While it is true that oil mixed with the gas displaces some of the gas, it is a tiny amount. Plus, the oil burns too. I have seen 2 strokes run with so much oil that they smoked like crazy and fouled the plug right away, but aside from fouling plugs, and eventually building up carbon in the combustion chamber, exhaust port and muffler, it did not do any other damage. It is actually recommended to run a higher ratio of oil to gas in a new 2 stroke engine for the first tank.

Honda may have designed it a certain way, but they designed it a long time ago, and no longer provide parts for it, so you will have to make do with what you have. I don't know how you measured the premix, I use a measuring bottle, like this one http://www.cyclegear.com/CycleGear/A.../p/37880_00000

I also have no idea what the specs of the oil injection system were. One of the nice things about oil injection systems is that the good ones (Yamaha's Autolube system is the best one I know of) provide more or less oil depending on running conditions. Premix give the same amount under all conditions.


But it can be done. I ran a 1979 Kawasaki KE175 dual sport bike for years on premix. The oil injection was mostly missing when I got it.
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Old 12-12-2013, 02:24 PM   #100
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I would recommend 50:1 premix for a 49cc two-stroke scooter if ditching the oil pump.

If running a 72cc bbk or larger you may want to go closer to 40:1.

You shouldn't have to rejet the carb on a 49cc scooter. The oil pump is not a super high tech technology. It simply has the ability to use the throttle setting to alter the oil to gas ratio.
This works great for idle or low throttle applications for when the engine doesn't need as much oil. 80:1 or even 100:1 works better and keeps excess oil from gumming up the exhaust pipe and fouling the spark plug at lower engine speeds. At WOT that 49cc oil pump is probably set to (you guessed it) 50:1.

The thing is most of the time you ride a 49cc two smoke using 75 -100% throttle and the CVT keeps the rpms in a narrow range. 50:1 premix for all practical purposes will work just as well as the oil injection system
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Old 12-12-2013, 02:33 PM   #101
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Remember this is a 125cc bike.


Quote:
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I would recommend 50:1 premix for a 49cc two-stroke scooter if ditching the oil pump.

If running a 72cc bbk or larger you may want to go closer to 40:1.

You shouldn't have to rejet the carb on a 49cc scooter. The oil pump is not a super high tech technology. It simply has the ability to use the throttle setting to alter the oil to gas ratio.
This works great for idle or low throttle applications for when the engine doesn't as much oil. 80:1 or even 100:1 works better and keeps excess oil from gumming up the exhaust pipe and fouling the spark plug at lower engine speeds. At WOT that 49cc oil pump is probably set to (you guessed it) 50:1.

The thing is most of the time you ride a 49cc two smoke using 75 -100% throttle and the CVT keeps the rpms in a narrow range. 50:1 premix for all practical purposes will work just as well as the oil injection system
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Old 12-12-2013, 02:42 PM   #102
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OK then 125cc's. On a two-stroke scooter the principle is the same. 40:1 or maybe 36:1.
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Old 12-12-2013, 04:32 PM   #103
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I've run bikes up to 175cc with 40:1. It seems about perfect. A 125cc scooter will likely be run full throttle most of the time. I have two 125 4 strokes, and they get ridden mostly at full throttle. Only way to keep up with traffic in town. I also ride them WOT on the highway (not freeway) They don't keep up with traffic, I'd just rather ride at 55 mph than 40 mph.

There really can't be much wrong with that carb. Other than a lawn mower carb (no float setup), it's about as simple as it gets. Simple round slide, no CV diaphragm or coasting enricher. Almost exactly like the old Bing on my Puch moped.

One thing I would double check, is how the slide, throttle cable, spring, and needle fit together. If I remember correctly, I had an issue with a Tomos moped (also converted from oil injection to premix) not running right, had the carb apart several times, couldn't find anything wrong, and finally discovered I had something assembled wrong after looking at a diagram of it. Can't remember what it was though.
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Old 12-12-2013, 06:57 PM   #104
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Wow, I didn't expect the ENTIRE peanut gallery to chime in. This is exactly the kind of input I was hoping for. Thanks, guys.

I think before I was running probably a bit too rich, although I have yet to pull the plug to confirm this. I was running about 36 to 1, which seems excessively heavy on the oil side if I get what you're telling me. So 40 to 1 or 50 to 1 would be better?

As far as returning the oil induction to original specs, it is possible with a trip through the land of Ebay, where all the bits are to be had; all except the split cable that controls both the throttle and the oil pump. This could of course be jury rigged, so a complete resurrection is possible. Question is, would it be worth the $ and effort? Seems like maybe the answer is no.

So, this is what happened today: I checked my newly charged battery and that was OK. Then I put the carb back on, and this time ran a bit of grease around the two O-rings that hold the carb onto the intake. The PO had taken the scoot into the shop for the exact same problem that I've been having dying after warming up and then refusing to idle after that and all they did was replace the O-rings thinking that maybe there was an air leak. When I pulled the carb to clean it, it didn't seem particularly dirty, but I did run an electric guitar e string through the jet holes just to be sure.

So I put the carb back, set the mixture screw 1 and 3/4 turns out per specs, and hit the start button. She fired right up and sounded great! I guess the third time was the charm.

I spent the rest of the afternoon exploring the neighborhood, still not wanting to venture too far just in case I had to push her home, but nothing bad happened and I even crossed my first railroad tracks and got my first low five from a fellow motorcyclist! She is so fun to ride I can barely stand it, and can't wait to get back and ride her some more.

It's great to see how she was intended to ride and sound like, because since I've had her, she's always had one sort of problem or another. Maybe it's as you said, that these two stokes are really sensitive to air-fuel ratios. I squirted some WD-40 around the carb, airbox and intake to see if I had an airleak, but there was no indication of one.

So here are some beauty shots I took to mark my first trouble-free day on my Aero. It was colder than it looks, although my body temp never dipped to 94.9 like someone I know.

Thanks, all for helping me get back on the road and hopefully, staying there.



Santa Cruz, CA pier and the great Pacific Ocean.



Coconut Grove in background, where all the big bands used to appear back in the day.



Santa Cruz Beach Boardwalk in background. My new scoot with new luggage handling device attached.
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Old 12-13-2013, 11:30 AM   #105
baloneyskin daddy
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I've heard from various sources that the ethanol in todays gas is has an ill effect on premix and pretty much renders the oil useless or at least compromises its ability to lubricate as intended.It however does not have near as much effect on injected oils.
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