If you own a scooter and cannot get it to commence, you know how absolutely frustrating this can be. If you find yourself in this status keep reading for effective tips and insight.

Initially you need to calm and focus on the problem you are having so you can narrow it down to something specific. This will help you know closely what solution to pursue.

In order for a scooter to work efficiently and routinely, there are truly only 3 essential effects required. These are spark at the correct time, the correct 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 need is toachieve a entire inspection before you start operation it. You should start with a compression test as this is relatively simple to achieve. commence by checking the quantity and quality of the engine oil. If the oil is really soiled you might want to change it. Only do this if absolutely required 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 cleanly add an appropriate amount.

Once you have inspected the oil, hook up a good battery orpurchase a new one if required. Now you must to check out the spark plug and turnover the scooter for approximately 5 seconds. This will help circulate the oil. Let the scooter sit for about 15 seconds and then turnover the scooter again for about 5 seconds. Be careful not to turnover for more than 5 seconds and not pausing as this will initiate the starter to overheat and will display the starter out. The majority of scooters require a lowest of 100 psi in compression to operate properly. To correctly test this number the engine needs to be hot and the scooter needs to be operating. join a compression gauge and open the twist-grip completely. turnover the scooter pending the needle on the gauge stops tender. 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 superb. If your reading is below this reach you may have something out of spec 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 higher output this time, this is an indication that you might have bad rings. If you get about the same output as the first check, you possibly have bad valves.

Spark Check:

Now its time to test for spark. There are a few ways 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 partly dark region, try to turn over the scooter. You should detect a spark at the tip of the spark plug. If the spark is blue, it means it is a nice deep spark. A pale spark is less good and a golden one is weaker still. Most scooters have a relatively weak starter system compared to automobiles so even a golden spark should be ok. Now that you know you have spark, you need 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 matter. On these, in order to get the timing proper you will need to follow the timing procedure mentioned in the manual. generally, just before the piston reaches the top of its stroke, the spark occurs. There is small waiting time 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, brilliant! 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 gamble of making your scooter to work properly. Be cautious 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 closing thing to check is the mixture of fuel and air. It's important to have the right mix of each. Too much or too little of either 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 manifested. Try to resolve 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 empty out all the old gas. Now add fresh fuel and make sure it flows efficiently through the petcock on the floor 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 cases the lesser 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 wash the petcock. The gas flow should stop when you remove the vacuum.

Next you should remove the carburetor and thoroughly wash it. There are a lot of really 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 quite complicated on a Riva 180-200. The Riva only has partial access and 8 separate hoses running to the carburetor. The carburetor has very small passages which may get bunged. The scooter won't activate properly if the carburetor is not wholly clean, so be unwearied and thorough. I propose employing about a gallon of carburetor dip which you can get at your nearby supply store for about $11 dollars.

Initially take out all rubber and gaskets or they may get stained. This is important. Make sure these are detached before proceeding. Now infuse 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 modified. 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 automatic 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 increased by around 1/8th inches.

In our next series of articles we will cover how to inspect your exhaust system for problems. We hope you find this information useful.