Recent Posts  By   (Read times)

Mostly I have got to the point where a scooter is what it is, and if you aren't happy with it, get a different one. People throw these machines away for lots of terrible reasons, but mostly because they don't want to pay to fix them or can't find anyone to do the work. If you can do it, then you can just scoop up what you want. Sell what you have. After a while you learn how to deal with the State registration people.

I have been struggling with this same thing, hesitation, poor starting, power loss at wide open throttle, missing on hills. I tried a lot of things including a new vacuum fuel pump, and finally bought a Carter P60504 electric fuel pump and a Purolator #53 adjustable fuel pressure regulator, both on Ebay, installed them, set the pressure to 1 pound psi, and it started in a flash, idled smoothly, and runs without any problems. I think I fixed the problem. It's been such a long struggle, I am not sure it's really OK, but I've got my fingers crossed.

The fuel pump cost me $30 and the regulator was $21, shipping included.

OK, I patched the diaphragm with Shoe-Goo on both sides of the hole and a piece of nitrile glove as a patch on the carb side, not the vacuum side. I think it works. Adjusted the valves, replaced every hose and joint, cleaned out any grit from the fuel pump, replaced the fuel filter with a nice larger one, new spark plug, new air filter, did my best to adjust the a/f mixture.

Once it gets off the enrichener, after a couple of minutes of warm-up, it still has a hesitation miss when you roll on the throttle quickly from coasting or going downhill. There was a time when it felt like it would cut out just cruising on the freeway and when you gave it some throttle it would hesitate and then catch and run well. It accelerates fine once it gets past the hesitation.

I'm at the place where I think it's either:

1)the fuel pump not providing enough gas at idle or coast. It just seems like it should work better then, because that's when there's the most vacuum generally. I remember my 53 Buick had vacuum operated wipers and they would stop on acceleration and go like crazy downhill. or

2) the carb diaphragm is still leaking.

I hate buying parts and throwing then blindly at a problem, so I thought I'd run it by you.

So, from this manual it looks pretty good. I was looking to see if anyone knew if it was right. My carb is a constant velocity model with a pin and a vacuum powered diaphragm.

A couple of thoughts.

A business park or industrial park is a fine place to practice if you live in a busy urban area. They are pretty quiet on weekends.

Freeways. The way I see it it's somewhat more predictable than city streets. Everyone goes the same direction, at similar speeds. Sure, there are jerks, but they don't turn left in front of you (Gee officer, I never saw that lil moped!) and they rarely just stop and back into a parking space. Almost no one opens a door into me on the freeway. Not too many red light runners crossing in front of me. Here in California we can lane split, and that's an entirely different experience, much more risky and much more fun, but wait a while until you feel ready for it. Otherwise, take a spin on a freeway on a Sunday morning and get a sense of the speed and the sound. You'll be amazed that you survived, and you'll understand that it can be done.

I commute on San Francisco Bay Area freeways every day on an old Honda 250 Elite, and so far it's been OK. I'm 67 years old, I'm not a complete jerk, and I don't think it's crazy.

It's got a head and it's on there. What you need is only the valve cover and gasket and I don't see the timing chain either. The cam has been monkeyed with and the bolts holding together the bearing clamp are loose. You should try to find out why someone took it apart like this.

If there is a timing chain you have to put it together and set the cam so it's timed right. This is a knockoff of a Honda cn250 (Helix) engine and there are service manuals online you can use that show you how to do this. After you do that, then does the engine crank over? Don't try to start it, just crank it over. If it does, check the compression. If there's good compression, keep working on it. If the compression is bad you might need to start taking the top end apart to find out why.

Thanks for the answer. I'm used to restoring mid-80's Honda Elites, and they don't have an accelerator pump.

Is there supposed to be a spring inside, under the diaphragm? I took it apart and cleaned up the tiny passages, but there's no spring in there and the rod doesn't reach to anywhere near the plate on the throttle mechanism.

Thanks again.