Question about Motorcycles
I was on my way home from work and was doing about 40kpm and my scooter turned off and wouldnt turn back on .i did notice a bit of smoke comming out of the belt housing can you please help
I have a 150 sunl scooter when is cold the bike work but when is hot it starts to smoke and then when i give gas it shut of but it stay on running it only shut of when i give gas need some help
Posted on Oct 21, 2013
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Posted on Jan 02, 2017
first of all, was the bike running, then parked for a signifigant period of time? if so, the first thing your going to want to check is the fuel system. theres a fuel hose running from the fuel tank to the carburetor. remove the fuel line from the carb to check the condition of the fuel. fresh gas has almost a clear look. if it appears to be fine, then proceed by checking the carb to see if there is fuel in the reservoir. at the bottom of the carburetor, there should be a small screw. turn it out counterclockwise to see if gas comes out from one of the overflow fittings on the carb. if it begins to leak, then you most likely have enough fuel in the carb to start it. if it comes out of the hose looking dark, or smelling kind of funny, then youll need to clean the fuel system. to do that, you must drain all of the old fuel, flush the fuel tank a bit with fresh fuel, refill it with fresh fuel, and also clean out the carburetor. if youve never done this before, i would reccommend having a technician do it for you. lost parts or mis-adjusted carburetors can not only cause mechanical damage, but also be a potential safety hazzard due to performance problems.
if the fuel looks and smells fresh, then your going to want to check for ignition next. remove the spark plug from the cylinder head, attatch the boot to the top of the plug, make sure the electrode end is touching a good grounding point on the engine, and press the start button. BE CAREFUL on this step. if the plug sint grounded well, it could lead to you getting an electrical shock from the ignition system. its a good idea to hold the spark plug or boot with insulated pliers during this step, just as a precaution. while the engine is turning over, watch the gap on the spark plug end to see if there is a noticable spark. it should be fairly easy to hear as well. if there is spark, then your ignition system is most likely in good condition, so move on to the next step. if there is no spark, try this process over with a new spark plug. if the new one still doesnt spark, there is a problem with one of the components in the electrical system, and that should be further diagnosed by a certified technician.
I hope this helps you out a little bit. these are the first things that I would check. If you know the fuel system is in good condition, and you can see that there is a good ignition source, then you have a mechanical problem that would require more information to attemp to diagnose. if you have any questions, feel free to contact me. Ill be happy to further clarify or explain anything that I mentioned here.
Posted on Jul 28, 2009
Here's the deal. I have never even heard of your bike brand but I have 18 years in bike repair. If you promise not to give me anything less than a "helpful" rating I will tell you how to do the fix based on the assumption that the bike has a standard carb and not a CV carb. The standard carb has a top "cap" that unscrews from the center of the carb body.
ALWAYS have a fire extinguisher on hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).
Drain the carburetor. There should be a screw on the lower side or bottom of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine. Now unscrew the top cap and pull the slide out of the throat of the carb. When you re-install the slide, be sure the long notch on the side of the slide lines up with the small pin inside the throat of the carb.
Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Before putting the slide back in the throat of the carb, move the clip on the jet needle one notch lower. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.
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Posted on Jun 09, 2009
I found that if I run 87 octane gasoline the engine accelerates up to full speed without the skipping and bogging down at any point it is running. It is worth trying. also try putting some "Sta-bil" fuel stabilizer in the gasoline - it has the ability to keep the carbureator cleaner. Not just during the time you are storing it, but rather all the time.
Posted on Jun 03, 2009
SOURCE: 150CC Roketa Scooter
Hi and welcome to FixYa,
On most versions of Roketa 150cc engines, the choke is automatic and electrically driven.. It is integrated with the carburetor.
Good luck and thank you for asking FixYa.
Posted on Jun 29, 2009
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