It's the greats spark plug that ever was. It changed my life even. Wait a minute, what am I reviewing here? Oh yeah, the stock plug for my 690. It's due for replacement, and KTM-Twins haven't let me down before, and their pricing is on point, so my 690 now has a new plug in it. I would support my local KTM shop, but they refuse to carry anything I actually need in-stock, so in the same amount of time, I support a KTM shop across the country, right?