My yamaha scooters Reviews

Our Featured yamaha scooters Writer



Let's Look At More yamaha scooters

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.
Buy electric scooters today!

Compression check. If you just acquired the scooter, you should first do a full inspection before you try to get it running. Please see this page on restoration. If this is the case, I'd do a compression check first because it's easy. First check the quantity and condition of the engine oil. Add oil as necessary. I wouldn't change it unless it's terribly dirty. The engine could be bad so you'd waste the oil change. Hook up or purchase a good battery. Leave out the spark plug and crank the scooter for ~5 seconds. This helps to circulate the oil. Let it set for ~15 seconds and do it again. It's not a good idea to continuously crank the starter because it can overheat and wear prematurely. Most scooters need a minimum of 100 psi in compression to run start and properly. Compression should be checked when the engine is warm, but that's kind of hard to do if the scooter is not running. So just hook up a compression gauge and open up the throttle all the way. Crank the scooter until the needle on the compression gague stops moving. This should take no more than 5 seconds. Very roughly, 100-125 psi is good, 125-150 psi is very good, and 150+ psi is great. If you don't have this level of compression then you have bad valves and/or bad piston rings. If you want, you can add a teaspoon or so of oil to the engine through the spark plug hole. Then try the compression test again. If compression is higher, then it's likely you have bad rings. The oil will seal the rings and give you better compression. If compression is the same, then you have bad/misadjusted valves.
Buy motor scooters today!

The Latest yamaha scooters News

BMW R900RT

Thu, 12 Jun 2008 19:04:12 +0200
Did you know that there has been a BMW R900RT for a year or so? Well, there is...



But it's only sold to Government Agencies, for Police and Emergency agencies, not for the gernal public.

...

Advertisment: .. Motorbiker.org: database of 1,000+ movies with motorcycles in them

Minnesotans scooting around gas prices - Minneapolis Star Tribune

Mon, 16 Jun 2008 23:09:00 GMT
Some find the small, relatively speedy and easy to maneuver mopeds a good way to get around campus. Tired of high gas prices, some consumers are leaving the Buick in the garage and ...

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. ...

::

50cc used scooter