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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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What changes to I need for high altitude? This doesn't come up very often, but I though I'd throw it in anyway. At high altitudes (above ~4000 ft), your scooter will start starving for air. You'll need to place a smaller main jet in the carb, so that it will take in less fuel. A good rule of thumb is to reduce the size of the main jet by ~10% and see if that works.
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Would You Spend US$300 K For This Motorcycle?

Mon, 11 Aug 2008 14:00:00 +0200
On eBay at this moment you'll find a OCC produced motorcycle for sale. It's the Shelby Cobra chopper.



Is any motorcycle worth US$300,000? Maybe for a special technology one, like the turbine driven motorcycle, the MT Y2K, but for a chopper?

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Ducati At MCN London Motorcycle Show 2008londonbikers.com, UK - 51 minutes agoHot on the heels of the 848 is the 1098R, this 180hp, 165kg race bike, homologated for the road and will lead the charge in the Superbike and Superstock ...Fri

Sun, 27 Jan 2008 15:46:20 +0100
Contra Costa Times, CA -But the highlight of the night is stuntman Clint Ewing's attempt to race his motorcycle through a 300-foot tunnel of fire. Kids, do not try this at home. ...

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US Stocks Head for Strong OpenLongview Daily News, WA - 5 minutes agoHarley-Davidson Inc. said Friday its fourth-quarter earnings fell 26.3 percent as motorcycle sales weakened in the US amid a slowing economy. ...US Stock Futures Climb;

Fri, 25 Jan 2008 14:14:47 +0100
Euro2day, Greece -Harley-Davidson Inc. said Friday its fourth-quarter earnings fell 26.3 percent as motorcycle sales weakened in the US amid a slowing economy. ...

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posted by Vespa Scooter @ 6:45 PM