As a proud owner of a KTM 390 Adventure, I’m always looking for small upgrades that bring out the best in this little beast. I recently decided to swap out the stock spark plugs for a set of NGK Iridium spark plugs, and let me tell you, the difference is noticeable!
Getting the Right Plug: NGK LKAR8AI-9
It’s essential to get the correct spark plug for your specific motorcycle. For the KTM 390 Adventure, the recommended NGK Iridium spark plug is the LKAR8AI-9. Be sure to double-check compatibility for your bike’s model year before purchasing. Using the wrong spark plug can negatively impact performance and potentially damage your engine.
The Benefits of Iridium
Discover how iridium’s properties translate into real-world advantages for your ride.
Durability
Iridium is an incredibly hard metal, meaning these plugs last much longer than traditional copper spark plugs. This saves you time and money on replacements.
Ignition Reliability
Iridium spark plugs create a stronger, more consistent spark. This translates into easier starts and smoother engine operation throughout the rev range.
Performance Perks
I haven’t dyno-tested it, but the bike feels a touch more responsive, especially at lower RPMs. Some riders report a slight improvement in fuel economy as well.
How NGK Iridium Plugs Work
Let’s explore how NGK Iridium plugs optimize combustion for a smoother ride.
Smaller Electrode
The iridium centre electrode on NGK plugs is significantly finer than a traditional copper plug. This allows for a more concentrated and intense spark.
Stronger, More Focused Ignition
This more powerful spark ensures more complete combustion of the fuel-air mixture in the cylinder. Consistent combustion means consistent power delivery.
Improved Combustion Efficiency
More complete fuel burning translates to smoother power transitions and less wasted energy, enhancing throttle response and reducing jerkiness.
My experience
Installation was as straightforward as any spark plug change. After getting the NGK Iridiums in, here’s what I noticed:
Smoother Running
The most noticeable difference is how the engine feels at idle and throughout the rev range. Less vibration and harshness translate into a more refined riding experience.
Improved Throttle Response
With better combustion, your engine reacts more immediately to throttle inputs. This translates to less hesitation and jerkiness, especially when accelerating from low speeds.
Optimized for Cold Starts
The NGK Iridium plugs’ design helps ensure an optimal spark for easier cold starts, which is reassuring even if I haven’t experienced issues in the past.
Would I Recommend Them?
Absolutely! If you’re looking to smooth out your KTM 390 Adventure’s power delivery, NGK Iridium spark plugs are worth considering. For the price, they offer noticeable improvements. I can definitely feel smoother pickups and less jerkiness when accelerating, giving the bike a more refined feel overall.