Friday, June 6, 2014
How to Troubleshoot a Motorcycle Carburetor
A carburetor is a device responsible for regulating the amount of fuel and air inside the cylinders of a motorcycle engine in order to maximize performance. The carburetor is a very expensive device to replace and it can become damaged from fuel clogs and mechanical failure. It requires regular maintenance to maintain proper function. If a carburetor starts to have problems, troubleshooting it becomes a necessity to keep the motorcycle in prime running condition.
Instructions
- 1
Start the motorcycle. If your motorcycle was running fine the last time it was used but then sat for an extended period of time (during the winter for example), the fuel may have broken down and gummed up the carburetor. The most common symptom of this is that the bike will not start properly after sitting for an extended period of time. If this is the case, you will need to remove and clean the carburetor.
2Run the motorcycle at a low RPM if you are able to. If the bike has trouble running at low RPM when the idle is at 1/4 throttle, the pilot system or the slide valve is the likely culprit.
3Increase the RPM gradually if the bike is still running. The engine is directly affected by the throttle of the carburetor. If the engine starts having problems between 1/4 and 3/4 throttle, the jet needle is more likely the problem and may need replacement. If the problem is happening at more than 3/4 throttle, the main fuel jet in the carburetor is the most likely issue.
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