The denso u-groove spark plug for ktm adventure 640 r 1999-2002 is part of the latest collection from denso.Features: 100 percent pre-fired to ensure reliable operation copper core center electrode for superior thermal conductivity unique five-rib insulator reduces flashover and decreases voltage loss dual copper and glass seal bonds the center electrode and insulator together for a gas-tight seal. Original equipment in automotive applications specifications: center electrode projection: non-projected center electrode type: standard electrode tip material: nickel alloy ground electrode shape: u-groove heat range: 24 hex size imperial: 11 16 hex size metric: 17.5 Mm hex size: 17.5 Mm 11 16 model: x24esr-u product name: spark plug research value: finalized riding style: adventure touring dual-sport atv off-road snow street utv watercraft to fit: adly herkules hurricane 300 xs 2012 european models adly herkules hurricane 300 xs 2013 european models adly herkules hurricane 300 xs 2014 european models adly herkules hurricane 300 2010 european models adly herkules hurricane 300 2011 european models adly herkules interceptor 300 sport 2010 european models adly herkules interceptor 300 sport 2011 european models adly herkules interceptor 300 sport 2012 european models adly herkules interceptor 300 sport 2013 european models adly herkules interceptor 300 sport 2014 european models aprilia etx 350 1985 tuareg european models aprilia etx 350 1986 tuareg european models aprilia etx 3...