The denso iridium spark plug for laverda 1000 rgs 1982-1985 is part of the latest collection from denso.Features: six times harder than platinum, iridium withstands temperatures up to 4,000â f because the iridium electrodes of these plugs can be shrunk to only 0.4Mm, voltage requirements decrease while firing performance improves 360â laser welding of electrode provides a seal that resists wear even in the worst conditions ground electrode features a tapered cut and u-groove that form a large volume area for the flame's center specifications: center electrode projection: non-projected center electrode type: fine wire electrical resistance: 5k ohms electrode tip material: iridium ground electrode shape: grooved taper cut heat range: 27 hex size imperial: 13 16 hex size metric: 20.6 Mm hex size: 20.6 Mm 13 16 model: iw27 product name: spark plug research value: finalized to fit: aprilia af1 50 1991 futura european models aprilia af1 50 1992 futura european models aprilia classic 125 1997 european models aprilia classic 125 1998 european models aprilia classic 125 1999 european models aprilia classic 125 2000 european models aprilia classic 125 2001 european models aprilia etx 125 1998 european models aprilia mx 50 2003 all models aprilia mx 50 2004 all models aprilia pegaso 50 1992 european models aprilia pegaso 50 1993 european models aprilia pegaso 50 1994 european models aprilia pegaso 50 1995 european models aprilia pegaso 50 1996 european models aprilia pegaso 50 1997 ...