25/03/2008
Owning a Honda CB350 H'ness or CB350RS is a delightful experience, offering a blend of classic aesthetics and modern reliability. These machines, whether you know them as the H'ness in India or the CB350 in other markets, share a robust 348cc single-cylinder engine that's designed for simple, enjoyable riding. However, like any precision-engineered machine, its longevity and performance depend heavily on diligent maintenance, with lubrication being paramount. Understanding how to properly lubricate your CB350 isn't just about pouring in oil; it's about safeguarding your investment and ensuring countless miles of trouble-free motoring across the UK's diverse roads.
The Lifeblood of Your Engine: Engine Oil
The engine oil in your Honda CB350 plays a multifaceted role: it lubricates moving parts to reduce friction and wear, cools the engine by carrying away heat, cleans by suspending contaminants, and helps seal piston rings. Neglecting your engine oil is akin to running a marathon without water – it will eventually lead to catastrophic failure. For the Honda CB350 H'ness and CB350RS, Honda specifically recommends Pro Honda GN4 10W-30 engine oil. This viscosity grade is crucial for ensuring optimal performance across various temperatures typical of the UK climate, providing excellent cold-start protection whilst maintaining stability when the engine reaches operating temperature.
Engine Oil Change Intervals
Adhering to the recommended service intervals is non-negotiable. For the Honda CB350, the engine oil needs to be replaced every 4,000 miles (6,000 km) or annually, whichever comes first. Even if your mileage is low, contaminants can build up and the oil can degrade over time, losing its protective properties. Therefore, an annual oil change is essential, even if your mileage counter hasn't hit the 4,000-mile mark. Regular oil changes are the single most important maintenance item you can perform to extend the life of your engine.
Checking Your Engine Oil Level
Before every ride, or at least weekly if you're a frequent rider, you should perform a quick check of your engine oil level. This is one of the crucial pre-ride checks recommended by Honda. Ensure your motorcycle is on a level surface and upright (not on its side stand). The CB350 typically has a dipstick or a sight glass to check the level. Consult your owner's manual for the exact procedure, but generally, the oil level should be between the upper and lower marks. If it's low, top it up with the recommended oil type. Running with insufficient oil can lead to severe engine damage.
The Essential Engine Oil Filter
Unlike some older Honda models, such as the CB250RS which utilised a wire sieve, your Honda CB350 H'ness/RS is equipped with a modern engine oil filter (part number 15412-K0N-D01). This filter is vital for trapping contaminants and metallic particles that accumulate in the oil, preventing them from circulating and causing wear. The oil filter should be replaced every second oil change, meaning every 8,000 miles (12,000 km) or every two years. Always use a genuine Honda filter or a high-quality aftermarket equivalent to ensure proper filtration and fitment. Failing to replace the filter can lead to clogged oil passages and reduced oil flow, severely compromising engine lubrication.
Engine Oil and Filter Service Schedule
| Service Item | Interval (x 1000 km) | Interval (x 1000 mi) | Interval (Months) | Action |
|---|---|---|---|---|
| Engine oil (Pro Honda GN4 10W-30) | 6, 12, 18, 24, 30, 36 | 4, 8, 12, 16, 20, 24 | 6, 12, 18, 24, 30, 36 | Replace (R) |
| Engine oil filter (15412-K0N-D01) | 12, 24, 36 | 8, 16, 24 | 12, 24, 36 | Replace (R) |
Keeping the Power Flowing: Drive Chain Lubrication
While not strictly 'engine' lubrication, the drive chain is a critical component for transmitting power from your engine to the rear wheel. A well-lubricated chain ensures smooth power delivery, reduces wear on sprockets, and extends the chain's lifespan. Given that many CB350s are ridden in areas with varying road quality and weather conditions, especially in the UK, consistent chain maintenance is paramount.
Recommended Chain Lubricants
Honda recommends using a good-quality chain lubricant. Products like Motul chain paste or a complete Motul chain care kit are excellent choices, often coming with tools to aid the process. Alternatively, a heavy-weight gear oil can also be used. The key is to use a lubricant specifically designed for motorcycle chains, as it needs to withstand high speeds, resist fling-off, and protect against corrosion.
When and How to Lubricate Your Chain
The drive chain should be inspected for lubrication condition and lubricated if necessary every 600 miles (1,000 km). However, this frequency should be increased if you frequently ride in dusty or rainy conditions. It is also crucial to lubricate the chain immediately after washing your motorcycle, as water can strip away existing lubricant and lead to rust. To lubricate, ensure the chain is clean (use a chain cleaner if necessary) and then apply the lubricant evenly to the inner side of the chain, allowing it to penetrate the rollers and O-rings. Spin the wheel to ensure even distribution and wipe off any excess to prevent dirt attraction.
Drive Chain Maintenance Schedule
| Service Item | Interval (Every) | Action |
|---|---|---|
| Drive chain lubrication condition | 600 mi / 1000 km | Inspect (I), Lubricate (L) if necessary |
Note: Perform these items more often if riding in dusty or rainy conditions. Always lubricate after washing the motorcycle.
Other Important Lubrication Points
Beyond the engine and drive chain, there are other components on your CB350 that require periodic inspection and, where necessary, lubrication to ensure smooth operation and prevent premature wear.
Clutch System
The clutch system, including the clutch cable and pivot points, should be inspected regularly for smooth operation. If the clutch lever feels stiff or sticky, it may require lubrication of the cable and the lever's pivot. A light grease or cable lubricant can be used to ensure the clutch operates freely, contributing to a smoother riding experience and preventing premature clutch wear.
Steering Head Bearings
The steering head bearings are vital for smooth and precise steering. While the maintenance schedule for the CB350 lists lubrication for these bearings at 24,000 miles (36,000 km), Honda suggests that this procedure requires mechanical skill and recommends having it serviced by a qualified mechanic for safety reasons. This is because proper adjustment and lubrication of steering bearings are critical for stable handling and rider safety.
The Benefits of Diligent Lubrication
Adhering to a strict lubrication schedule for your Honda CB350 offers numerous benefits:
- Extended Engine Life: Proper lubrication significantly reduces wear on internal engine components, ensuring your engine runs efficiently for many years.
- Optimised Performance: A well-lubricated engine operates with less friction, translating to smoother power delivery and potentially better fuel economy.
- Enhanced Reliability: Regular maintenance, especially lubrication, drastically reduces the likelihood of unexpected breakdowns due to component failure.
- Improved Riding Experience: Smooth clutch operation and precise steering contribute to a more enjoyable and confident ride.
- Higher Resale Value: A motorcycle with a meticulously maintained service history, particularly concerning lubrication, will command a better price should you decide to sell it.
Frequently Asked Questions (FAQs)
What type of engine oil is best for my Honda CB350?
Honda specifically recommends Pro Honda GN4 10W-30 engine oil for your CB350 H'ness or CB350RS. Always stick to the manufacturer's recommendation for optimal performance and longevity.
How often should I change the engine oil on my CB350?
You should change the engine oil every 4,000 miles (6,000 km) or annually, whichever comes first. Don't skip the annual change, even if you haven't covered much mileage.
Does the Honda CB350 have an oil filter?
Yes, the Honda CB350 H'ness and CB350RS are equipped with a proper spin-on engine oil filter (part number 15412-K0N-D01). This filter should be replaced every 8,000 miles (12,000 km) or every two years. This is a key difference from some older models like the CB250RS, which only had a wire mesh sieve.
How often should I lubricate the drive chain?
The drive chain should be inspected and lubricated every 600 miles (1,000 km). However, if you ride in wet or dusty conditions, or after washing your motorcycle, you should lubricate it more frequently.
Can I use car oil in my motorcycle engine?
It is generally not recommended to use car oil in a motorcycle engine, especially one with a wet clutch like the CB350. Car oils often contain friction modifiers that can cause the clutch to slip, leading to poor performance and premature wear. Always use motorcycle-specific oil that is JASO MA or MA2 certified, indicating it's suitable for wet clutch systems.
Conclusion
Lubricating your Honda CB350 H'ness or CB350RS is a fundamental aspect of its maintenance that should never be overlooked. From the precise viscosity of the engine oil to the regular care of your drive chain, each lubrication task contributes significantly to the motorcycle's overall health and your riding pleasure. By following Honda's recommended schedule and understanding the 'why' behind each step, you're not just performing maintenance; you're investing in the enduring spirit and reliable performance of your beloved CB350. Keep it well-oiled, and it will serve you faithfully on every journey.
If you want to read more articles similar to Mastering CB350 Lubrication: A UK Guide, you can visit the Maintenance category.