Molly Ayala
Installing an electric start on a YZ450F is possible but may be costly and time-consuming. The process involves purchasing a donor WR450, dismantling both the WR450 and YZ450F motors, and transferring specific components from the YZ450F motor to the WR450 motor. These components include the crank, clutch transmission cylinder, and head. Finally, the modified WR450 motor is installed into the YZ450F, along with the necessary electrical system and battery. An alternative suggestion is to sell the YZ450F and purchase a WR450, which already has electric start hardware. This option may be more cost-effective and less complex.
| Characteristics | Values |
|---|---|
| Is it possible to put an electric start on a YZ450F? | Yes |
| What year is this applicable to? | At least 2003 and 2006 models |
| What is required? | A case with a mount/hole for the starter, a WR450 donor bike, a new battery, a new airbox, new side cases, a different ignition, flywheel and gears. |
| Is there an easier alternative? | Yes, it is much easier to buy a Yamaha WR450 and turn it into a YZ450. |
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What You'll Learn
Buy a WR450 and dismantle the motor
To put an electric start on a YZ450F, one option is to buy a Yamaha WR450 and dismantle the motor. The WR450 comes with all the electric start hardware already attached, and it will be cheaper than buying the individual components and installing them on the YZ450F.
Buy a Yamaha WR450
Locate and purchase a Yamaha WR450. This model already has an electric start system in place, which will save you time and money in the long run.
Dismantle the WR450 Motor
- Refer to the Yamaha WR450 Owner's Service Manual for detailed instructions on dismantling the motor. The manual provides model-specific information and diagrams to guide you through the process safely and effectively.
- Prepare the necessary tools and a workspace before beginning the dismantling process. Ensure you have a basic understanding of motorcycle engine mechanics and follow safety protocols to avoid injury or damage to the vehicle.
- Start by removing the engine components that surround the starter motor, following the instructions in the service manual. This will expose the starter motor and provide access for removal.
- Carefully disconnect any attached electrical systems and components, making note of their placement for reassembly. This includes disconnecting the starter motor's electrical connections and ensuring the battery is disconnected.
- Remove the starter motor from the engine, taking note of its mounting position and any attached components. The specific process may vary depending on the year of your WR450, so refer to the appropriate section in the service manual for your model year.
By following these steps, you will have successfully dismantled the WR450 motor and extracted the electric start components necessary for your project. Remember to keep all parts organized and safely stored for future use.
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Switch the crank, clutch, transmission cylinder and head from YZ to WR
To switch the crank, clutch, transmission cylinder and head from a YZ to a WR, you'll need to follow a few careful steps. Here's a guide to help you through the process:
Firstly, it's important to understand the scope of the task. While it is possible to put an electric start on a YZ450F, it will be a significant undertaking. The 2003 Yamaha YZ450F cases, for example, have the necessary openings to accept an electric starter, but the costs of the conversion would be high. The project would require a new airbox, side cases, ignition, flywheel, and gears.
Now, for the step-by-step process of switching the crank, clutch, transmission cylinder, and head:
Step 1: Prepare and Understand the Process
Before you begin, it's crucial to have a clear understanding of the task at hand. Refer to your Yamaha manual to familiarize yourself with the specific steps involved in the gear swap. The manual will provide diagrams and detailed instructions that you should carefully study.
Step 2: Lay Out the New Gears
It is recommended to keep your new gears in their bags until you are ready to install them. This helps prevent confusion during the process. You can also place the old gears back into the bags for safekeeping.
Step 3: Work on the Front Shaft (Main Axle)
The front shaft, also known as the main axle, is where the clutch mounts. Begin by focusing on this component and ensuring that you have the necessary tools and knowledge to work on it effectively.
Step 4: Remove the Crank
Using a hammer, you can carefully smack the crank out of the engine. This will allow you to access the bottom end of the engine and begin the process of swapping the necessary components.
Step 5: Swap the Crank, Clutch, Transmission Cylinder, and Head
With the engine open and the crank removed, you can now start the process of switching these components from the YZ to the WR. Carefully follow the instructions in your Yamaha manual to ensure that each part is installed correctly and in the proper sequence. Pay close attention to the gears, collars, snap rings, and shift forks, ensuring they are all correctly aligned and installed.
Remember, this is a complex process, and it is always recommended to have mechanical experience or expertise before attempting such a conversion. If you are unsure about any steps or feel uncomfortable proceeding, it may be wise to consult a professional or seek advice from experienced individuals in forums or communities dedicated to motorcycle modifications.
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Install WR motor into YZ
Installing a WR motor into a YZ bike is possible, but it is a complex process that requires careful planning and consideration. Here is a step-by-step guide to help you through the installation process:
Step 1: Understand the Differences Between the WR and YZ Motors
Before beginning the installation, it is important to understand the differences between the WR and YZ motors. The WR motor is designed for electric start, while the YZ motor typically relies on kick-starting. The WR motor may also have different cams, gears, and carburettor settings compared to the YZ motor. Additionally, the WR motor may require a different airbox, side cases, ignition, flywheel, and gears to be compatible with the YZ bike.
Step 2: Check for Mounting Compatibility
Ensure that your YZ bike's case has a mount or hole that can accommodate the electric starter. This is crucial for a secure fit.
Step 3: Source the Necessary Parts
You will need to purchase the WR motor, the electric starter, and any additional components identified in Step 1. This may include a new airbox, side cases, ignition, flywheel, and gears. Additionally, consider the lighting requirements. The WR motor may require a lighting coil for the headlight, so ensure you have the necessary parts for a functional lighting system.
Step 4: Disassemble the YZ Bike
Carefully disassemble the YZ bike, removing the existing motor and any components that will be replaced. Keep the frame and suspension, as these will remain intact.
Step 5: Install the WR Motor
Place the WR motor into the YZ bike's frame, ensuring that the motor mounts line up correctly. Secure the motor in place, following the manufacturer's instructions or seeking guidance from a professional mechanic.
Step 6: Connect the Electrical System
Hook up the electrical system, including the electric starter. Find a suitable location for the battery and ensure all electrical connections are secure and properly routed.
Step 7: Test and Adjust
Once the installation is complete, test the bike to ensure proper functionality. You may need to make adjustments to the jetting/settings to optimize performance.
Step 8: Registration and Compliance
Finally, ensure that your modified bike complies with local registration and emissions standards. In some regions, you may only need to change the engine number on your registration, while in others, you may need to obtain an exemption or comply with additional ADR and emissions rules. Consult with local authorities or a transport specialist to ensure your bike is legally compliant.
Please note that this process may vary depending on your specific YZ bike model and the WR motor you are installing. Always refer to the manufacturer's instructions or seek professional assistance if you are unsure about any steps.
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Find a place for the battery
To install an electric start on your YZ450F, you will need to find a place for the battery. Here are some detailed instructions and considerations to help you with this process:
Firstly, it is important to note that the process of converting your YZ450F to electric start can be complex and costly. A more cost-effective solution may be to purchase a Yamaha WR450, which comes with electric start hardware, and convert it into a YZ450F. This option might save you time and money in the long run.
However, if you choose to proceed with converting your YZ450F, you will need to source a battery that fits your bike. The battery's dimensions should be considered to ensure it can be securely placed without affecting the bike's performance or handling. A common suggestion is to purchase a donor WR450 and transfer its components, including the battery box, to your YZ450F. This ensures compatibility and a neat installation.
When finding a place for the battery, consider a location that is easily accessible for maintenance and inspection. It should be secured firmly to handle vibrations and rough terrain without shifting or becoming loose. Some motorcycles have designated battery compartments, but if your YZ450F does not, you may need to fabricate a custom battery box or modify existing components to accommodate the battery securely.
Additionally, ensure that the battery is placed away from direct heat sources or areas that may be exposed to fuel or oil leaks. The battery should be adequately ventilated to prevent overheating and potential damage. Keep in mind that the electrical connections to the battery must be secure and insulated to prevent short circuits or electrical failures.
Finally, when deciding on the battery placement, consider the weight distribution of your YZ450F. Placing the battery too high or too far forward may affect the bike's handling dynamics. Aim for a location that maintains a low center of gravity and balanced weight distribution to ensure optimal performance and handling characteristics. Remember to refer to your motorcycle's manual or seek advice from experienced mechanics or forums for specific guidance on your YZ450F model.
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Switch the WR wiring harness into the YZ
To switch the WR wiring harness into the YZ, you will need to source the wiring harness from a Yamaha WR450F. The 2003 Yamaha YZ450F cases have the necessary openings to accept an electric starter, but it would be expensive to mount the WR450 starter.
A more cost-effective solution is to purchase a Yamaha WR450, which comes with all the electric start hardware already attached, and convert it into a YZ450. This option will save you money in the long run and won't be as challenging to execute.
When sourcing the wiring harness, ensure that it is in good working order. All plugs and pins should be intact and functional. You can find used parts from the 2005 Yamaha WR450F model, but keep in mind that this part is no longer available from Yamaha directly. Check the part number for fitment before purchasing to ensure compatibility with your bike.
Additionally, be aware that you may need to pay import duties or taxes upon delivery, depending on your country's customs regulations. Refer to the relevant authorities for more information on potential additional costs.
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Frequently asked questions
Yes, it is possible. However, it is an extensive process and may be costly.
You will need a donor WR450. Dismantle the motor, switch the crank, clutch transmission cylinder, and head from the YZ motor to the WR motor. Install the WR motor in the YZ and switch the wiring harnesses.
It is much easier to buy a Yamaha WR450, which comes with all the electric start hardware already attached, and turn it into a YZ450.
The process is complex and time-consuming. You will need to find a place for the battery and make changes to the motor and electrical system. The costs can also be high, including the need for a new airbox, side cases, ignition, flywheel, and gears.
