I'm having a hard time locating the NGK plug you guys are recommending. As a rider living in the 4th largets US city, I find it hard to believe its that difficult. I'e been to my local Auto Zone, Advance, Bap Geon, and NAPA. When I look at the thread reach, its good but the cap is a push on type and the one I need for my coil wire is a threaded type. As you know, it does not thread on it just grips it different. In the old days, the cap would spin off and you could use it either way, but not anymore?