
When it comes to maintaining and servicing a KTM 300 electric start, lubrication is key. From the clutch to the starter-drive gears and even the spokes, proper lubrication ensures smooth performance and prolongs the lifespan of the bike's components. While KTM recommends specific products like Motorex, riders often seek alternatives that offer better value without compromising performance. This includes conventional automotive oils, copper grease, and even unconventional solutions like graphite powder. With regular maintenance and the right lubricants, KTM 300 owners can ensure their bikes are ready for any terrain.
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What You'll Learn

Starter-drive gears lubrication
Lubricating the starter-drive gears of a KTM 300 electric start is a crucial aspect of maintenance. While the process may vary slightly depending on the specific model and year of your KTM 300, here are some detailed instructions and recommendations for lubricating the starter-drive gears:
Annual Cleaning and Regreasing:
It is recommended to annually clean and re-grease the flywheel gear and Bendix gear with wheel bearing grease. The Bendix body, which is located behind the ignition cover on the engine's left side, should also be lubricated with a silicone spray. This maintenance step ensures the optimal performance and longevity of these critical components.
Grease Recommendations:
When it comes to choosing the right grease for the starter-drive gears, several options are available:
- Copper Grease: Some KTM owners recommend using copper grease on the bushes to keep them in good condition.
- Marine Grease: In addition to copper grease, a general marine grease can be applied to the cog teeth.
- Molybdenum Disulphide Assembly Lube: This type of lube has been mentioned as an alternative to the more expensive KTM-recommended grease. It is effective and available at sensible prices from brands like Liquimoly and Halfords.
- Graphite Powder: Graphite powder is another option for lubrication. It lubricates well and has the advantage of not being sticky, which means no issues with water, mud, or buildup. However, it should not be used near electrical components as it is highly conductive.
KTM Manual Recommendations:
While the KTM manual may suggest specific lubricants, some owners find them expensive and prefer alternative options.
Additional Tips:
- It is important to regularly check the starter mechanism, especially after riding in wet and challenging conditions, to ensure that all components, including the bushes and cog teeth, are in good condition.
- Some KTM 300 owners have shared experiences with intermittent electric starter issues, which may be related to earthing problems. Troubleshooting and addressing these issues can help ensure the starter functions as expected.
By following these instructions and recommendations, you can effectively lubricate the starter-drive gears of your KTM 300 electric start, ensuring smooth and reliable performance.
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Transmission fluids
KTM recommends Motorex transmission fluid, but other name-brand, transmission-specific fluids like Maxima or Motul will also work well. Some budget-conscious individuals use 10w40 automotive oil, but it's important to note that these oils lack polymers that cushion the gears and clutch plates. While automotive engine oil can be used, it needs to be changed two to three times more often to provide adequate protection.
When it comes to starter bush lubricants, there are a few options to consider. Some people recommend using copper grease on the bushes and general marine grease on the cog teeth. Others suggest Molybdenum disulphide assembly lube or graphite powder, which lubricates well and is not sticky, so it doesn't cause issues with water and mud. However, it should not be used near electrical components as it is highly conductive and could cause a short circuit. Silicone spray is also recommended for lubricating the Bendix body.
Additionally, it's important to note that some KTM owners have experienced issues with the electric start on their 300 models. In some cases, the problem may lie in a bad earth connection, which can be addressed by creating a separate earth lead. However, converting a kick start to electric start can be challenging and may require new cases or an aftermarket conversion kit.
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Chain lubrication
One option is to use a dedicated chain lube, such as the KTM-recommended Chain Lube Road Strong. This lubricant is designed specifically for motorcycle chains and can provide protection and lubrication to help keep the chain in good condition. Another option is to use a general-purpose lubricant such as oil or grease. However, it is important to choose a lubricant that is compatible with the materials used in the chain and to avoid using too much, as excess lubricant can attract dirt and debris, which can damage the chain.
In addition to choosing the right lubricant, it is also important to properly clean and maintain the chain. Over time, the chain can become contaminated with dirt, grease, and other debris, which can reduce its effectiveness and lead to premature wear. It is recommended to clean the chain regularly using a degreaser or a similar product to remove built-up contaminants. It is also important to check the chain for any signs of wear or damage and to adjust or replace the chain as necessary.
When lubricating the chain, it is important to follow the manufacturer's recommendations and to use the correct amount of lubricant. Applying too much lubricant can attract dirt and debris, while applying too little may not provide adequate protection. It is also important to allow the lubricant to penetrate the chain and to wipe off any excess before riding.
Overall, proper chain lubrication and maintenance are crucial for the performance and longevity of a KTM 300. By using the appropriate lubricants and following the recommended maintenance procedures, riders can help ensure their bike's chain remains in good condition and performs optimally.
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Grease and sealants
When it comes to grease and sealants for your KTM 300 electric start, there are a few options and considerations to keep in mind.
Firstly, it is important to choose a high-quality grease that will effectively lubricate the components of the starter mechanism. Some riders have recommended using copper grease on the bushes and general marine grease on the cog teeth. Another option is to use Molybdenum disulphide assembly lube, which is similar to the grease recommended by KTM but at a more reasonable price point. Liquimoly offers Moly grease at a sensible price, and while Halfords also offers Moly grease, the quality may not be as good as the Liquimoly product.
Additionally, you may want to consider using a waterproof grease, such as Bell Ray, to protect the components from water and mud. This is especially important if you plan to ride in wet and muddy conditions.
Another option for lubrication is graphite powder, which lubricates well and has the advantage of not being sticky. However, it is important to note that graphite powder should not be used near electrical components as it is highly conductive and could cause a short circuit.
When it comes to sealants, there are a variety of products available on the market that can be used in conjunction with your KTM 300 electric start. Sealants help to protect and preserve the components, ensuring a longer lifespan and better performance.
Remember to always refer to your KTM manual for specific recommendations and guidelines, but keep in mind that some riders have found the recommended products to be overly expensive.
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Brake fluids
It is important to use the correct type of brake fluid for your KTM 300 electric start to ensure optimal performance and safety. While some sources recommend using mineral oil for the clutch master cylinder, others caution against using normal brake fluid as it can damage the seals. Instead, consider using a product specifically designed for motorcycles, such as the KTM/Motorex Brake Fluid 5.1, which is available from Amazon.com and other automotive retailers. This product is designed for use with KTM motorcycles and ensures compatibility and optimal performance.
There are several types of brake fluids available on the market, each designed for specific applications. One common type is DOT 3 brake fluid, which is suitable for most everyday vehicles. It has a dry boiling point of around 205°C, making it effective for general use. However, for high-performance vehicles or racing applications, DOT 4 brake fluid is recommended. DOT 4 brake fluid has a higher dry boiling point of approximately 230°C, providing increased resistance to heat and ensuring consistent braking performance under demanding conditions.
When choosing a brake fluid, it is crucial to consider the specific recommendations provided by your vehicle's manufacturer. Different motorcycle models may have varying requirements, and using the incorrect type of brake fluid can lead to reduced braking performance or even damage to the braking system. Always refer to your owner's manual or consult a qualified mechanic if you are unsure about the appropriate brake fluid for your KTM 300 electric start. Additionally, pay attention to the colour of the brake fluid. Most brake fluids are coloured to make them easily identifiable, and using a fluid that matches the colour recommended by your vehicle's manufacturer can help ensure compatibility and safety.
It is also important to regularly check and maintain your brake fluid levels. Over time, brake fluid can absorb moisture, reducing its boiling point and affecting its performance. It is generally recommended to replace your brake fluid periodically, typically every two years or at specific mileage intervals, to ensure optimal braking performance and safety. By following these guidelines and selecting the appropriate brake fluid for your KTM 300 electric start, you can confidently maintain your vehicle's braking system and enjoy a safe and reliable riding experience.
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Frequently asked questions
KTM recommends using Motorex lube, but any name-brand, transmission-specific fluid like Maxima or Motul will also work well.
Some alternatives to the official KTM lube include copper grease, marine grease, Molybdenum disulphide assembly lube, graphite powder, and silicone spray.
It is recommended to annually clean and re-grease the flywheel gear and Bendix gear with wheel bearing grease.
If the starter mechanism is slowing down, it may be time to check and lubricate the mechanism.
While it is possible to convert a kick start to an electric start, it may be more cost-effective to purchase a different e-start bike or a new electric start model.

































