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The Basic Details of Disassembling a Motorcycle Engine


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The Basic Details of Disassembling a Motorcycle Engine

Daniel Roberts

Have a classic motorcycle that desperately needs an engine overhaul?  

Classic motorbike offers a reminiscence of a classy, stylish and mysterious era. And like everything else, bikes are also prone to pricey surprises.

Rebuilding engines is considerably an easier since the basic rules and procedures imply on every type of engine, regardless of size.

Rebuilding engines can be required for several reasons, such as damage caused by accident or if rust has collected on it overtime. Often times just the replacement of worn out parts is required while other procedures requires upgrade or tuning.

Carrying out a full engine rebuild is a work of professionals as it requires a planned and efficient mechanism to perform the task.

As with other mechanical tasks engine rebuild requires preparations they are key to a successful result. Sequencing the procedure for full rebuild is essential.

To prepare the workplace, having the essential for this task is important for the ultimate result such as motorcycle lift or containers for parts. If you wish to perform this task in your garage, you might not have several essential tools to begin with— letting professionals do this job is of course more cost-efficient.

To start off, the engine first needs to be disassembled, keeping in mind the systematic process to avoid any damage. Professionals follow this process  religiously.

Securing the Bike

Securing the bike before attempting to remove the components of the bike is essential. The front wheel  should be secured in a wheel clamp and ratchet clamp must be utilized to stop the bike from moving.

Remove All Fluid

Use appropriate containers to remove oil and other fluids from the bike. It is best to leave the bike overnight to remove all the fluids and to ensure that it the bike has dried out. Meanwhile, soak the bolts and pipes in WD40 spray to remove any grease or dirt.

Disconnect Wires & Battery

Disconnecting all battery wires and remove the battery.

Discconnect wires and batteries.png


Motorcycles commonly have a color-coded system that helps you reassemble them as well. This noted, mechanics should mark the wires appropriately so that when reassembling, they can be reattached to the correct connectors.


Remove Muffler & Head Pipe

Removal of these components requires meticulous precision since all nuts and bolts need to be removed simultaneously to avoid putting any pressure on adjacent parts. Loosening one end of the head pipe completely while the rest is screwed on could lead to dents and scratches.

Remove Carburetor

Even though the carburetor seems relatively simple, there are a lot of intricate parts within it. To remove it, the first step should be to drain the fluid chambers. Remove all the nuts and bolts cleanse them with WD40 and keep them in separate container. Be extra careful—you don’t want to lose those tiny springs and components.

Remove Cases & Other Parts

After removing the hard parts, removing the cases at this point will help dissemble the engine, as it is much easier to access the engine frame. Removing the clutch plate and oil lines will add to the feasibility of removing the engine. Note that when removing the clutch, it’s essential to use the specific tool for clutch removal known as clutch cage holding tool.

Loosen the Engine Mounting Bolts

Engine Mounting Bolts.png


It is important to remove the engine mounting bolts simultaneously because the engine might drop due to its weight, making it difficult to unbolt the other nuts. Using proper tools to carry the weight of the engine is important for the safety of mechanic.

Dissembling and assembling the engine requires several professional tools and heavy operations for the removal of weighted objects. For this purpose it is important that the tasks for rebuilding or repairing the engine be left in the hands of professionals.

Classic Cycles Ltd. – Preserving Vintage and Classic Motorcycles in New Jersey

Classic Cycles Ltd offers comprehensive and hassle-free vintage motorcycle restoration services in New Jersey. From tune-ups to maintenance and advice, they cover a variety of motorcycles, vintage motorcycle repairs including American, Japanese, and British bikes.

For further information, contact them today, or call at (908) 996-5337.