Buying A Used Gas Scooter
Tips for Scooters
If you own a scooter and cannot get it to start, you know how absolutely frustrating this can be. If you find you are in this position keep with us for caring tips and insight.
Initially you have to calm and focus on the quandary you are having so you can narrow it down to something precise. This will help you know just what answer to pursue.
In order for a scooter to operate efficiently and typically, there are genuinely only 3 leading effects desired. These are ignition at the approved time, the approved air and fuel mixture with correct exhaust flow and finally sufficient engine compression. If you can master and learn to maintain these, you will be in good shape.
Compression Check:
If you have just purchased a scooter one of the first effects you must have is tooperate a broad inspection before you commence running it. You should commence with a compression test as this is relatively simple to operate. start by checking the quantity and quality of the engine oil. If the oil is extremely soiled you might want to change it. Only do this if absolutely wanted because you might find out later that the engine is hurt and then you will have wasted new oil in the change. If the oil level is low, then minimally add an appropriate quantity.
Once you have inspected the oil, hook up a good battery orobtain a new one if wanted. Now you need to inspect out the spark plug and crank the scooter for approximately 5 seconds. This will help circulate the oil. Let the scooter sit for about 15 seconds and then crank the scooter again for about 5 seconds. Be cautious not to crank for more than 5 seconds without pausing as this will make the starter to roast and will grind the starter out. The majority of scooters expect a minimum of 100 psi in compression to activate properly. To properly test this number the engine wants to be warm and the scooter wants to be operating. join a compression gauge and open the throttle completely. crank the scooter pending the needle on the gauge stops stirring. This should take around 5 seconds. Make a note of the gauge reading. In general 100-125 psi is good, 125-150 psi is very good, and 150 or more psi is admirable. If your analysis is below this reach you may have something wrong with your valves or piston rings. You might try adding one teaspoon of oil to the engine through the spark plug hole. After this, try the compression test again. If you get a increased reading this time, this is an indication that you might have bad rings. If you get about the same reading as the first test, you maybe have bad valves.
Spark Check:
Now its time to test for spark. There are a few tests to accomplish this. The simplest way is to take out the spark plug and place it back in the spark plug cap. Next, ground it to the engine. You can do this by laying it on a non-painted part of the engine. Make sure you have metal-to-metal contact. Now in a partially dark vicinity, try to turn over the scooter. You should note a spark at the tip of the spark plug. If the spark is blue, it means it is a nice sound spark. A white spark is less good and a blond one is weaker still. Most scooters have a relatively weak starter system compared to automobiles so even a blond spark should be ok. Now that you know you have spark, you have to make sure it is happening at the right time. Almost every scooter manufactured after 1980 has an electronic ignition If this is the case, this is good news. These systems cannot be set and seldom go out of time. If your scooter has points, this is another situation. On these, in order to get the timing correct you will have to follow the timing procedure mentioned in the guidebook. routinely, just before the piston reaches the top of its stroke, the spark occurs. There is small waiting phase between the spark plug fire and the fuel-air mixture ignition. This is why the spark occurs somewhat early. Most ignition systems have a spark advance built in so that as the engine speeds up the spark time is adjusted accordingly. This helps make sure the mixture ignites at just the right time.
Starting Fluid:
Next you need to test the starting fluid. arrogant there is enough compression, spurt in a little starting fluid and see if the scooter will fire up. If so, wonderful! This lets you know you have both enough compression and the right spark. Let your scooter run for just a short time on starting fluid. If this succeeds it means you have a good risk of making your scooter to work properly. Be sensitive however. You do not want to run your engine very long on starter fluid as it is hard on the engine.
Fuel/Air mixture:
The ending thing to check is the mixture of fuel and air. It’s important to have the right balance of each. Too much or too little of whichever will be a hindrance. If the scooter has not been used for more than 3 months, sludgy deposits left over from evaporated gas may be present. Try to determine how long it has been since the scooter was last operated. If it has been more than 3 months, the fuel system and the carburetor should be cleaned out. Detach the fuel line and clear out all the old gas. Now add new fuel and make sure it flows efficiently through the petcock on the underside of the fuel tank. If vacuum controls the petcock, then you may have to draw a vacuum on the line to get the fuel toflow to start. In these instances the slighter line on the petcock is the vacuum line. Is the flow of gas good and steady? If so, great! If not, you will need to remove and clean the petcock. The gas flow should terminate when you remove the vacuum.
Next you should detach the carburetor and thoroughly clean it. There are a lot of extremely small air and fuel passageways in the carburetor that have to be clean in order for your scooter to run properly. With care, dismantle the carburetor. This can be fairly simple on a 50cc scooter or totally complicated on a Riva 180-200. The Riva only has partial access and 8 single hoses connecting to the carburetor. The carburetor has very small passages which may get stopped. The scooter won’t maneuver properly if the carburetor is not perfectly clean, so be enduring and thorough. I advise employing about a gallon of carburetor dip which you can acquire at your local supply store for about $11 dollars.
Initially take out all rubber and gaskets or they may get blemished. This is important. Make sure these are detached before proceeding. Now saturate the carburetor for about twenty minutes and use compressed air to blow it out. It is crucial for you to get the passageways and jets clean. guarantee the jets are clean particularly the starter jet. Occasionally carb cleaner won’t unclog these small jets. If this happens, make use of a guitar/piano wire, copper electrical wire or a tiny drill bit pin vise to finish the job. Be sure that the hole in the starter jet is not enlarged or the tuning will be changed. Put everything back together, looking for any cracks in the gaskets or rubber carb boots. If they are old and cracked, it’s a good idea to get them replaced.
If there is an electric choke, make sure that it works. The resistance between the wires should be around 10 ohms or less on the assembly. Take the choke from the carb and the wires should be plugged into a 12V source for about 15 minutes. The choke body should be welcoming to the finger. Now measure again. The length should have amplified by around 1/8th inches.
In our next series of articles we will cover how to inspect your gas tank for problems. We hope you find this information useful.
By: Roberto Bell
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