Harley 6-Volt 6V Ignition Coil Panhead Knucklehead Flathead UL Black 31604-48Part #: 31604-48 V-twin part # 32-1338
Harley-Davidson part number 31604-48 is a 6-volt ignition coil primarily used on vintage "Big Twin" motorcycles from 1948 to 1964.
It is a "square-style" coil and is a standard component for Panhead, Knucklehead, and Flathead models.
- Primary Resistance: 0.85 – 0.95 Ohms
- Secondary Resistance: 17.5 – 18.5 Ohms
- Input Voltage: 6V
- Ignition Type: Mechanical (Points)
- Fire Method: Dual Fire (both cylinders fire at the same time)
Fitment: This part is specifically for the following Harley-Davidson series:
-
Panhead (1948–1964):
- EL (Hydra Glide): 1949–1952 (61 cu. in. models).
- FL (Hydra Glide / Duo Glide): 1948–1964 (74 cu. in. models).
- FLH (Duo Glide): 1955–1964.
- Knucklehead: Late 1947 and 1948 models (transitioning to the new coil style).
- Flathead (U Series): 1948 Big Twin Flatheads.
Please make sure of fitment before buying.
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