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Got spark? First check for spark. There are a few ways to do this. The easiest way is to remove the spark plug and put it back in the spark plug cap. Then ground it to the engine - you should be able to lay it against a non-painted portion of the engine. Make sure there is good metal-to-metal contact. In a semi darkened area, attempt to start the scooter. You should see a definite spark at the tip of the spark plug. It's hard to see in direct light. If the color of the spark is blue, that means it's a strong spark. A white color is less strong, and a yellow color is weak. Most scooter starting systems are a bit weak (compared to cars). Even a yellow spark should start your scooter just fine. Next, the spark must occur at the right time. Just about all scooters made since around 1980 have electonic ignition. These systems rarely can be set. This is good news. After working on maybe 50 scooters, I've never seen one go out of time. Scooters with points are another matter. You'll have to follow the timing procedure in the manual to get the timing correct. In general, the spark occurs just before the piston reaches the top of it's stroke. There is a slight delay between the spark plug fire and the fuel-air mixture ignition. That's why the spark occurs a little early. Most ignition systems have an advance unit build in, so that as the engine speeds up the time of the spark retards a little bit and helps the engine fire the mixture at the proper time.
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Assuming you have sufficient compression, try to squirt in a bit of starting fluid and then see if your scooter will start. If so, that's great! That means that you have sufficient compression and the proper spark. You should get the scooter to run for a second or so on starting fluid. If so, there's a good chance you can keep it running. One caution here - do not run your engine for very long on starting fluid because it's hard on the scooter engine.
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Next, you'll have to remove the carburetor and clean it. There are a low of tiny fuel and air passageways in the carb that must be clean it order for your scooter to run right. Carefully take the carb apart. This can be relative easy (on a 50cc scooter) or quite difficult (a Riva 180-200 has limited carb access and 8 separate hoses running to the carb). The carb has tiny passages that get gummed up. The scooter just will not run correctly if the carb is not completely clean, so take your time. I use a gallon container of carb dip (you can get a gallon at your local auto supply store for ~$10).
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motor scooter News From Around The World
XMAS 2008: Aprilia Balls
Tue, 9 Dec 2008 09:43:49 +0200
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After all the festivities around Christmas, you'll need exercise. What better way than going on the basket ball court for a bit of one-on-one with an Aprilia branded basket ball??
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Second area motorist dies in scooter accident - Maryland Gazette
Wed, 03 Dec 2008 15:45:11 GMT
Second area motorist dies in scooter accident Maryland Gazette, MD - By SEAN PATRICK NORRIS Staff Writer A Pasadena woman was killed Sunday, the second motor scooter rider to die in a crash in less than a week. ... |
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