Naraku Performance Parts For Scooters - Spark Plug Naraku 14-PR7-SS (BPR7HS) - pack of 10
Pack of 10 Naraku spark plugs 14-PR7-SS: Naraku spark plug as it is mounted in the vehicle ex works. Heat value and candle structure correspond to the original.
Produced according to the OEM guidelines of Japanese vehicle manufacturers for perfect repairs and durability.
The life of a candle is determined by the type of fuel, the condition of the engine, the operating times and the engine temperature. With 4-stroke engines from 250ccm, the candles should be cleaned or replaced after 6000km. With less cubic capacity, especially 2-stroke, about every 2500km. After this mileage, carbon deposits lead to starting difficulties and a loss of power due to the spark plug. Increased short-distance operation and poor engine oil quality can shorten the intervals.
Wrench size: 20.8mm
Thread diameter: 14.0mm
Thread length: 12.7mm
Electrode gap: 0.7mm
Resistance: suppressed, 5kOhm
OEM numbers for comparison purposes:
NGK: BPR7HS
Champion: QL 78 YC
Denso: W 22 FPR / W 22 FPRU
14 = B thread diameter 14mm
P = P advanced insulator tip
R = R (Resistor) resistance plug 5kOhm
7 = 7 heat value
S = H (Short) short candle thread
S = S standard
Pack of 10 Naraku spark plugs 14-PR7-SS: Naraku spark plug as it is mounted in the vehicle ex works. Heat value and candle structure correspond to the original.
Produced according to the OEM guidelines of Japanese vehicle manufacturers for perfect repairs and durability.
The life of a candle is determined by the type of fuel, the condition of the engine, the operating times and the engine temperature. With 4-stroke engines from 250ccm, the candles should be cleaned or replaced after 6000km. With less cubic capacity, especially 2-stroke, about every 2500km. After this mileage, carbon deposits lead to starting difficulties and a loss of power due to the spark plug. Increased short-distance operation and poor engine oil quality can shorten the intervals.
Wrench size: 20.8mm
Thread diameter: 14.0mm
Thread length: 12.7mm
Electrode gap: 0.7mm
Resistance: suppressed, 5kOhm
OEM numbers for comparison purposes:
NGK: BPR7HS
Champion: QL 78 YC
Denso: W 22 FPR / W 22 FPRU
14 = B thread diameter 14mm
P = P advanced insulator tip
R = R (Resistor) resistance plug 5kOhm
7 = 7 heat value
S = H (Short) short candle thread
S = S standard