Denso (5309) IXU24 Iridium Power Spark Plug, (Pack of 1)

Denso Iridium Spark Plugs, IXU24Tested on Ducati Monster 696These are a direct replacement for NGK DCP8RE or Champion RA6HC spark plugs, which are used on a variety of motorcycles mostly the air-cooled Ducati L-Twin engines, such as the one in my Ducati Monster 696.The fine wire tip is 0.4mm in diameter, which many people confuse as the gap. The OEM gap for my DCP8RE plugs was listed as 0.7-0.8mm, however many people on the Internet recommended 0.9mm as a minimum gap when using Iridium spark plugs. They recommended upgrading the spark plug wires as well to handle the higher voltage for jumping that larger gap.Fine wire iridium plugs are mainly used on automotive engines due to their hardness, resistance to erosion, and overall durability in order to survive 100k miles. Since Ducati motorcycles are rather high maintenance (7500 mile interval for valve adjustments and timing belt replacements), copper plugs are used. I have never had copper plugs last longer than 10k-15k miles before the center electrode showed significant erosion.On a motorcycle, the fine wire iridium plug is supposed to require less voltage to arc across the gap, which means a larger gap is needed/required/recommended. I set my IXU24's at 0.9mm and installed Magnecor 2582 spark plug wires. These wires have a 8.5mm insulation versus the original 6.7mm wires from Ducati.I did not notice an easier time starting the 696, although it is inherently troublesome to start below 50 degrees F. Once the engine fired up and remained idling, the throttle response was slightly better with these Denso iridium spark plugs. I did not notice any increase in power though, and the Magnecor wires did nothing for throttle response or power either. The Denso Iridium plugs by themselves did improve throttle response slightly.I recommend upgrading to the Iridium plugs for reduced maintenance and more consistent spark. I use OEM iridiums on my Ford modular engines and firmly believe in their capabilities.These directly replace the factory plugs. Note that the terminal is threaded, but it comes from Denso with the standard spark plug terminal screwed on. Some plugs like the NGK copper, have a permanent terminal end. Bottom line is that you're good to go with the IXU24 plugs.Overall: 5/5 stars, less expensive than OEM Ducati spark plugs (although 3 times more expensive than OE-replacement NGK copper plugs), proven durability on automotive engines, slightly better throttle response, direct fit.

My 2011 Ducati Monster 796 had a lot of backfire and rough running to low speeds..below 3000 rpm. Now it runs perfectly...low speed is steady...high speed is very strong. Highly recommended

I bought this specific spark plug for my (bone stock) 2011 HD Road King. I was having pinging issue under certain conditions. After researching the issue and from previous experiences, I decided to try one heat range cooler spark plug. This is an old school fix, but it worked perfectly. No plug fouling or dark discoloration. It cut back on the pinging dramatically.

I bought a pair of these Denso IXU24 Iridium spark plugs for my Harley Davidson. Mechanics said I couldn't use anything other than 'Harley' branded plugs, which I knew to be marketing bunk. I looked this plug over and discovered close similarities to H-D 'Screaming Eagle' branded plugs. Work great! I'm most happy with the purchase.

Work great

Installed these on my can am defender HD10. Runs smoother and revs faster.

WORK AND FIT IS GOOD

Strong and long-lasting spark plugs.