This is the second time I've used this product. At 19,000 km, the NGK Standard Plug BP5HA, which was installed from the time of delivery, was replaced with NGK's Iridium plugs at 19,000 km It's a different kind of power. I chose Denso because of its reputation as a It's true that compared to NGK, each explosion seems to be more powerful and has more power. I noticed that after about a year and a half of driving about 1,000 miles, the Idling was starting to have some Rose on it. (Only to the extent that one segment of Tachometer, which divides the 1000 rpm into four segments, blinks. The Manufacturer's website recommends that motorcycles should be replaced at 5,000 km. I bought the same Denso because I thought it would be time to replace it if it was 10,000 kilos, even if I was exaggerating Large. It's more expensive than the NGK at 2,200 yen per bottle, but it's a single cylinder so I don't mind. The replacement takes 5 minutes with the Plug socket & ratchet wrench if you remove the Radiator shroud on the Left Side. When I used to drive a BMW, I got fed up with the quality of the OEM specified Champion and Bosch plugs and measured the reach and protrusion and used the same thermal value NGK to solve the problem. "Plug is ngk. But I feel that Denso is also something to be reckoned with.