Reasons why motorcycle not starting and the solutions

Reasons why motorcycle not starting

In case that the motorcycle not starting, users can do a simple check first. First, remove the spark plug and spark plug cap, ignite the engine and see if there is high pressure.

If it’s not high voltage, there may be fault in the spark plugs, igniters, and other components. If it is high voltage, check the carburetor for gasoline. It is recommended to loose the oil drain screw at the bottom of the carburetor and see if the oil can drain out. If the oil cannot be drained, there may be no oil in the tank or the fuel tank switch and fuel filter are clogged.

If the oil and electricity are working just fine, users can feel whether the pressure is strong enough when start with the feet. If there is no pressure or motorcycle not starting even if the pressure, oil, and electricity are normal, the carburetor may be clogged. The specific causes and solutions are as follows.

Solutions to motorcycle not starting

1. The battery power is not enough:

When using the battery to start the engine, if the starter cannot drive the engine, it means that the battery power is weak or the starter is faulty. In this case, users can first use a multimeter to check whether the bike battery voltage is sufficient. If the voltage is insufficient, they need to replace the battery or recharge it and try again. Because the motorcycle battery pack is discharged for a long time, the internal plates will be damaged, making it impossible to recharge and use it.

2. Starter failure:

Starter faults include the faults of the starter itself and the starter circuit. If the starter itself is faulty, it will need to be replaced with a new starter. If the starter circuit is faulty, check whether the circuit is aging or falling off, and rewire it, to avoid motorcycle not starting.

3.Insufficient compression of engine cylinder:

Insufficient compression of the engine cylinder or wear of the engine cylinder leads to abnormal cylinder pressure, which can also cause the motorcycle to fail to ignite. Put the hand on the cylinder mouth where the spark plug is installed, and plug it tightly before starting.

If the air rushing out and the finger can feel it at the same time, it means the cylinder is normal. If not, it’s not normal. If no air is flushed out or in, the cylinder pressure is abnormal. Users can also use a cylinder pressure gauge to check the cylinder pressure. If the cylinder pressure is too low, they need to disassemble and inspect the engine to find out the cause and repair it.

4.Carburetor failure:

The carburetor is an important component of the motorcycle’s fuel supply system. If the carburetor fails or the fuel switch is clogged, it will affect the starting performance of the motorcycle, causing motorcycle not starting. This problem can be solved by cleaning the carburetor or replacing it.

5.Spark plug failure:

The spark plug is an important component of the motorcycle ignition system. If the spark plug fails, the motorcycle will not ignite. This problem can be solved by replacing the spark plug.

6.Ignition coil failure:

The ignition coil is another important components of the motorcycle ignition system. It is responsible for converting the low-voltage electricity of the battery into high-voltage electricity, which is supplied to the spark plug for ignition. If the ignition coil fails, it will cause the motorcycle to fail to ignite, thus causing motorcycle not starting. This problem can be solved by replacing the ignition coil.

7.Clutch switch failure:

The clutch switch is an important component in the motorcycle starting circuit. When the clutch is in the disengaged state, the clutch switch disconnects the starting circuit so that the starter cannot drive the engine; when the clutch is in the combined state, the clutch switch closes the starting circuit so that the starter can drive the engine. If the clutch switch fails, motorcycle not starting will happen. This problem can be solved by replacing the clutch switch.

8.Ignition switch failure:

The ignition switch is one of the core components of the motorcycle starting circuit. It is responsible for controlling the power on and off of the ignition system and the starting relay. If the ignition switch fails, it will cause motorcycle not starting. This problem can be solved by replacing the ignition switch.

9.Starting relay failure:

The starting relay is responsible for connecting the starter circuit when starting, so that the starter can drive the engine to run. If the starter relay fails, motorcycle not starting will happen. This problem can be solved by replacing the starter relay.

10.Oil circuit failure:

First unplug the oil pipe under the fuel tank and connect it to the mineral water bottle. If there is a constant flow of oil, the mailbox is not blocked. If it’s clogged, remove the entire mailbox, drain out the oil, flush it with a high-pressure water gun, and allow air to circulate for a few days.

11.Circuit failure:

Test whether the circuit is normal, insert the spark plug into the cap and start it. It is best to turn off the radiator of the inner cylinder and see if there is any spark. Sparks are usually blue. If it is not, or is small, there is a problem with the circuit. Users should go to a repair shop to repair it.

Motorcycle maintenance in winter

From the above, we understand the main reasons why motorcycle not starting. Some users may find that after leaving it for a whole winter, the motorcycle will also be difficult to start when the weather warms up and the motorcycle is used again. This is related to the maintenance during winter.

Entering December, the temperature has dropped significantly in many regions. It is too cold to ride a motorcycle in winter, and many motorcycle users have begun to prepare for maintenance and closure of their vehicles. The correct way to deal with the motorcycle can save a lot of trouble when re-ride it in spring and avoid motorcycle not starting.

1.Change engine oil:

If the motorcycle has been ridden for thousands of kilometers and is running on fuel, it is recommended to change the oil first. If it’s not ridden for a long time, a large amount of carbon deposits, debris and other impurities will precipitate in the engine oil, which will affect the engine performance and the engine oil may deteriorate. Fill the replaced engine oil to half or two-thirds, just keep the oil tank with some oil. If the tank is left empty for a long time, the tank may become rusty.

2.Cut the power

Under normal circumstances, after an electric motorcycle is parked for several weeks, the battery will continue to consume power and the battery performance will also decrease sharply. Therefore, the battery should be removed and placed indoors. If disassembly and assembly are troublesome, users of motorcycle with SLA battery can open the motorcycle seat and remove the negative or positive electrode to form an open circuit to prevent the battery from continuing to consume electricity. When use the motorcycle next year, just reconnect it.

This operation is mainly to prevent the battery from losing power. If it cannot start when reusing the battery, the user can remove it and charge it with a charger. Users who use swappable batteries do not have this concern, because the battery swapping cabinet at swap station can perform centralized and scientific maintenance on the battery, eliminating the trouble of self-maintenance.

3.Maintainance

It is also necessary to perform maintenance on the motorcycle before parking it for a long time. It can maintain the performance of the vehicle. If safety hazards are not dealt with in time after using the vehicle, and the vehicle is parked for a long time, unnecessary trouble may occur when the vehicle is used again. The most basic inspection and maintenance must be essential, such as checking antifreeze, inflating tires, checking brake pads, oiling the chains, etc.

4.Cleaning

The first step after maintenance is to clean the entire body of the vehicle. There must be some motorcycle parts on the vehicle body where dirt and evil practices hide. Be careful to use a soft detergent when cleaning, and wipe dry in time after cleaning. Of course, you can also leave it to a professional motorcycle washing store. Some details such as chains, brake pads and tires can be cleaned more comprehensively with professional cleaning tools.

5.Parking

When parking the vehicle in winter, try to choose a clean and dry indoor space, preferably an underground garage. Motorcycles with large braces should use large braces as possible to avoid uneven stress on the vehicle’s shock absorption for a long time. If there’s no space to park indoors or in a garage, purchase soft and suitable motorcycle clothing to reduce the impact of rain and other external factors.

After completing the above steps, the motorcycle can be leaved for the winter. A few more tedious steps can avoid a lot of unnecessary troubles and ensure the overall performance and quality of the vehicle when use it in the coming year. If still find it troublesome, users can also ride the vehicle regularly to ensure that the motorcycle rides normally.