Simple Ways to Fix Motorcycle Engine Noise When Accelerating

The noise from your motorcycle engine in the course of acceleration is a huge part of what makes it classic. At the same time, the noise from your motorbike’s engine when accelerating tells a lot about the health of your engine. However, if you hear weird from your engine when accelerating, then it means something isn’t right with your engine. 

The engine is an integral part of your motorcycle, if the noise from your engine is left unchecked your motorcycle performance will suffer considerably and may lead to total engine seizure 

Some of the effective ways to fix the engine noise when accelerating are; to use premium quality oil, get a tune-up, check the oil and use engine coolants.

In this article, we’ll talk about this in detail, including types of engine noise, causes of engine noise, and solutions to help you remedy this problem.

Some Common Motorcycle Noise When Accelerating and What They Mean 

Ticking Noise

If you are cruising your motorbike downtown and notice weird intermittent noise coming from your motorbike’s engine, then it’s time to send your motorcycle for servicing. You may also notice that the noise comes from the chassis, but it is difficult to point out the exact source.

However, if your exhaust pipe is properly sealed, then the noise is probably induced by engine valves or a valve train issue. 

Any time the valve clearance opens up, the engine valve lifters may rattle down the valve tops and make ticking noise on the end tops in the course of accelerating. 

Knocking Noise 

Hearing knocking noises that emanate from deep inside your motorbike’s engine when accelerating can be unpleasant news. The noise is frequently linked to your engine motorbike’s bottom end. Usually the crankshaft and the con rods. However, if you were to collapse the bearings or the big end shells when riding you will possibly hear this noise that might cause engine seizure.

Clattering and Slapping Noise

If you detect clattering and slapping noise from the throttle or predominantly at tick-over, then it indicates that your tensioner or cam chain needs to be replaced. Similar to your drive chain, over time the cam chain may stretch out and reach its wear limit. However, when this occurs the chain may flap and induce noise. In some extreme cases, the chain may skip some teeth. If you experience this in your motorcycle, you will probably have acceleration issues that can damage your engine. 

Grinding Noise

Hearing grinding noise from your motorcycle’s engine when accelerating may indicate a bearing failure somewhere in the engine.   which require immediate troubleshooting. 

Similar Read:

Ways to fix bike clicking and creaking noise when pedaling

How to fix Motorcycle Clicking, Rattling, and Whining  Noise When Accelerating 

Possible Causes of Motorcycle Engine Noise When Accelerating 

Untimely Denotation 

One of the reasons why your motorcycle makes clicking when accelerating is due to premature donation. Most motorcycles come with four-stroke-engine systems. Inside these four-stroke engines, there is an intake and outlet valve.

The intake valve takes up air and fuel. Once the fuel and air enter the chamber the mixture is tightened by the piston and pressure within the chamber increases as the fuel-air mixture cannot escape. Due to the pressure within the chamber, a spark is created and the piston moves up and down.

However, this is linked to untimely denotation when the spark ignites the fuel-air mixture before the piston cylinder gets to the top. That is the piston diverts and collides with the walls of the cylinder.

The inordinate piston force clashing on the cylinder walls is what causes the knocking or whirring you hear from your motorbike’s engine when accelerating. The untimely denotation usually occurs as a result of the unsuitable timing of the spark plug.

The Uneven Shape of the Cylinder Walls

If you have been using your motorcycle for several years the cylinder walls may get deformed. They will lose their perfect shape as a result of this. And as a result of this, the cylinder wall may go in between the track of the piston cylinder. 

As you may already know that the piston moves up and down continuously and due to the deformity of cylinder walls, the piston may collide with the walls as it goes up and down, creating a knocking sound in the engine when you accelerate. 

The main reason why the cylinder walls buckle is due to the overheating of the engine. There are high temperatures inside the engine that can even melt the metallic walls of the cylinder but usually, they get deformed.

The deformed cylinder wall can get in the way of the piston and create a barrier. Anytime there barrier in the way of pistons it results in a ticking noise usually known as engine known knocking. 

Valve Tapping Issues 

These days modern motorcycle engines are best-known known as interference engines, in that the piston impinges on the valves when they are open. So with this, you need to properly adjust the time the piston will impinge on the valve.

However, if the timing is wrong the piston can hit the valve and bend it and this may induce noise in your motorcycle engine. 

The valve tapping can happen as a result of the untimely denotation or overheating of the engine. Anytime the valve experience pressure within the chamber it can lose its shape, so it is advisable to keep a valve clearance. 

If you hear a knocking or whirring noise from your motorcycle engine when accelerating then is likely the valve is slamming.

Loose Bearings Within the Engine 

There are several bearings used in your motorcycle’s engine to keep it running.  These bearings spin freely around the engine to perform their respective. The crankshaft is no exception, in that the crankshaft has a bearing that helps it to spin the arm. The crankshaft controls movement within the engine, so if by any means the crankshaft doesn’t work it can’t stay in its normal position.

Due to this the crankshaft goes in the way of the piston and collides with them. This is common in bearings that have been used for a long time and are near the end of their life span. Which at this stage may be worn-out, loose, malfunctioning improperly, and causing problems. One of the reasons why the bearings wear out is improper engine oil viscosity. This may induce a rattling noise in your motorbike’s engine. 

Lack of Lubrication

Inadequate oil in your motorcycle engine can cause end knock bottom noise. This happens when friction builds up between the crankshaft and crankshaft bearing leading to a significant mechanism. Too much oil may also cause end knocking noise.

How to Stop the Noise from Your Motorcycle Engine When Accelerating 

To solve the noise problem you need to start with the things you have got a better understanding of, You can take out the side panels and find out if the spark plug has enough space or not.

There is a simple trick that you can use to calculate the adequate space for the plug.

There is a gauge that you can use to calculate the plug gap. This gauge is relatively like half a dollar. However, if you are trying to calculate the plug’s gap and the coil doesn’t sit in the gaps then it simply means you are using a bad plug.

Above all try changing your engine oil and add up a considerable amount of coolant.

Next inspect the engine carburetor if you realize it is in some way inappropriately placed, tighten it up screws. 

Use Premium-Quality Oil

In most cases, people like to use cheap oil and save some bucks. But this must not be the case. This cheap oil usually contains ethanol which is very dangerous for your engine. 

Regular Check-Ups of Your Motorcycle 

The oil in your engine needs to be changed regularly after a certain period. Using oil for a long period can have detrimental effects on the motorcycle and the engine. Even though you may not ride your motorbike but you still need to replenish the oil. Also, ensure to use the right spark plugs for your motorbike.

Get a Tune-Up 

Getting your motorcycle tuned up every two years will help keep your motorcycle in a stable condition. During the tune-up process, the motorcycle is often cut up and everything part is tested. So in case, there is any problem inside the engine it will be worked on. The timing is also adjusted during the tune-up process. 

Use Engine Coolant

Another essential thing you can do to quiet down the noise from your motorbike’s engine when accelerating is to avoid overheating Overheating induce the valve in the engine. This is why it is very necessary to use engine coolant for optimal engine temperature.

Check the Oil

Check out the level of oil in your motorbike and replenish it if needed. When the oil runs too low the engine components lose that protective coat of lubrication. When this occurs the engine parts will run together and cause a racket of metal clunking noise, louder than its regular sound. To remedy this problem, ensure to replenish the right amount of oil. 

Adjust the Drive  Chain 

Inspect the drive and adjust, it if it is misplaced as it can also cause a ticking noise when it becomes loose.


Hearing unusual noise from your motorcycle’s engine when accelerating indicates an underlying problem that needs to be solved immediately. Ignoring these red flags may lead to serious damages and huge repair costs in the future. In this article, we have discussed some of the best approaches to help you fix the engine noise issue.

If after trying all these procedures and the noise hasn’t stopped, the best solution is to take your motorcycle to a professional mechanic for a quick fix. 


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