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My Eternal Project, or the Scooter That Refuses to Live. Any Ideas?

4330 Views 59 Replies 11 Participants Last post by  Unkle Krusty
And the scooter is dead for a third time now...I’m running out of things to replace.

If you’ve not been following my CF Moto saga, here’s a recap:

First Revival

Acquired in November from a fellow Gambler 500 team member. I replaced the battery, the carburetor, and learned the starter solenoid was installed backwards by a previous owner. It sat for roughly two years without running and I made a gamble that I can make the old fuel burn again. While I was successful in that, I made two critical errors:

1. I didn’t replace the fuel filter.

2. I rode it every day for a month, not really ever allowing it to get to running temperatures.

Despite that, the scooter was good for 75mph, impressive acceleration, and it all around it ran absolutely perfectly. I felt I had myself a good score and with actual fresh fuel I’d probably even break 80mph. I proceeded to daily it for a month, taking it everywhere.

Fixing my Original Mistake

I made sure I ran all the bad fuel out of the tank and made sure the tank wasn’t rusty. Then I filled it with good fuel.

I then replaced all the fuel lines, the fuel filter, and the carburetor. I then installed a pod filter. I also closed off the crankcase vent to the airbox. Instead, the crank vents out into the outside. The original problem with not being able to start after getting hot remained, but at least I was no longer fouling my air filter and carb with particulate matter (air filter material) and oil. Top speed was about 40. Figured I would get more speed from restricting the pod filter, but first I really wanted to address the problem with not being able to restart with a warm engine.

Take Three

I decided to replace basically everything else I didn’t touch. I took the panels off and replaced the air filter so I can ditch the pod filter and go back to the factory setup (I still have the crank venting to the outside, though) and not have to jet the carb. Then I replaced any old vacuum lines that remained. All this work resulted in no change. It does cold starts well, but introduce any heat and it’s dead. The engine tries to fire, but it just won’t.

You can get it to start on starting fluid, and then it will go on to run like it’s misfiring and it’ll die as soon as you stop moving...then fail to start again.

Only thing I haven’t replaced is the spark plug (because the bloody thing has a spark plug that requires a bigger socket than the one I have for my smarts), but I fear it’ll be a waste of time.

Is there anything else I’m missing or do you think the spark plug will be my magic bullet?

This was supposed to be an easy project, but it certainly has taught me a lot about motorcycle/scooter repair! If the spark plug doesn’t fix it I’ll probably get rid of it. I’m just not sure how much I would be able to trust it at that point..And I'd hate to do that because when this thing was running well it was an awesome way to get around. 75mph top speed and everything.

For a TL;DR - here’s everything I replaced:

- Battery
- Fuel Lines
- Vacuum Lines
- Carburetor (built in electric choke)(2 times)
- Air Filter
- Fuel Filter
- Oil
- Fuel

Only thing I can think to replace now is little sparky..
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Good luck with it Miss M. :thumbsup:
I second the "get rid of the POS quick". I swear the Chinese are working on us at every possible level. Getting us to question are abilities is just another dig.

You better find out why your oil is so thin. That may be the cause of your problems if maybe only a round about reason.

Hang in there Miss M. :thumbsup:
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You are having the kind of luck I have when it comes motorcycle engines. Give me an old Ford tractor any day. Those I can make go. :smile:
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If you're able, pull the cover off of the magneto area and pull the bolt out which holds the rotor on. Look carefully and see if there is any evidence the flywheel key has sheared and rotor moved its position.
That's good cmon but what would cause it to shear if that turns out to be the case. Just poor Chinese metal or something more catastrophic? Yeah, I try to learn something about these motorcycle engines and how they run now and then.:grin:
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Well once again you get another super find. You are beginning to irk me you know. (just kidding):grin: And good for you on your new attack plan on the Chinese Ruckus clone. Hope it finally gets that puppy working.
After I get something running I always worry about it the next. Will the darn thing start and run like it did? Good luck!!!

So did I get that correct, you are not out any money on the Sym? That's really too bad. That was a great deal there.

BTW, looking at that picture of the engine, there is a hose right on top that has a heck of a kink in it. Probably a vacuum line which means something may not work correctly or change if it is un-kinked.
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Sounds like your clone will do what you want until you find something, so good luck on both.:thumbsup:
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