1969 - 1989
YAMAHA FS1
Iridium spark plug
| DENSO
DENSO
Fits to:
YAMAHA FS1 50 E W/Pedal [1973 - 1981]
YAMAHA FS1 50 W/Pedal [1970 - 1974]
YAMAHA FS1 50 DX [1976 - 1984]
YAMAHA FS1 50 W/Footrest [1972 - 1975]
YAMAHA FS1 50 [1970 - 1989]
YAMAHA FS1-E 50 DX W/Pedal [1973 - 1974
YAMAHA FS1 80 DX [1980 - 1980
YAMAHA FS1-E 50 W/Pedal [1970 - 1981
YAMAHA FS1 50 SE Yankee [1981 - 1982]
YAMAHA FS1 50 SE Sheriff [1981 - 1982]
YAMAHA FS1 50 [1970 - 1970]
YAMAHA FS1 50 DX W/Pedal [1973 - 1975]
YAMAHA FS1 50 DX W/Footrest [1973 - 1981]
YAMAHA FS1 50 W/Footrest [1969 - 1989]
Specifications
| Manufacturer | DENSO |
|---|---|
| Heat range | 22 |
| Model | Iridium Power |
| Terminal configuration | threaded Stud |
| Thread size | 14 mm |
| Style | IWF22 |
| Type | Resistor Type |
| Units | Each |
| Center electrode type | Fine Wire |
| Electrode tip material | Iridium |
| Center electrode projection | Non-Projected |
| 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