1976 - 1984
YAMAHA XS 250
Iridium spark plug
| DENSO
DENSO
Fits to:
YAMAHA XS 250 SP W/Cast Wheels [1980 - 1981]
YAMAHA XS 250 [1983 - 1983]
YAMAHA XS 250 [1979 - 1980]
YAMAHA XS 250 SP [1982 - 1982]
YAMAHA XS 250 [1982 - 1984]
YAMAHA XS 250 SP [1981 - 1982]
YAMAHA XS 250 W/Cast Wheels [1978 - 1981]
YAMAHA XS 250 W/Cast Wheels [1977 - 1981]
YAMAHA XS 250 W/Spoke Wheels [1976 - 1977]
YAMAHA XS 250 SE [1980 - 1982]
Specifications
| Manufacturer | DENSO |
|---|---|
| Thread size | 14 mm |
| Center electrode projection | Non-Projected |
| Heat range | 7 |
| Model | Iridium Power |
| Terminal configuration | threaded Stud |
| Style | IW22 |
| Type | Resistor Type |
| Units | Each |
| Center electrode type | Fine Wire |
| Electrode tip material | Iridium |
| Thread reach | 19,1 mm (3/4") |
| Hex size | 20,6 mm (13/16") |
| Spark gap | 0,8 mm (0,031") |
| Ground electrode shape | Grooved| Taper Cut |
| Electrical resistance | 5k Ohms |
| Spark gap imperial | 0.031" |
| Spark gap metric | 0.8 mm |
Product description
Six times harder than platinum, iridium withstands temperatures up to 4,000°F Because the iridium electrodes of these plugs can be shrunk to only 0.4mm, voltage requirements decrease while firing performance improves 360° 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