Pack of 10 Naraku spark plugs 14-R9-LS: Naraku spark plug as fitted ex works in the vehicle. Thermal value and plug design correspond to the original.
Produced according to OEM guidelines of Japanese vehicle manufacturers for perfect repair and durability.
The service life of a spark plug is determined by the fuel type, engine condition, operating times and engine temperature. For 4-stroke engines from 250cc, the plugs should be cleaned or replaced after 6000km. For smaller displacements, especially 2-strokes, approx. every 2500 km. After this mileage, oil carbon deposits lead to starting difficulties and loss of power caused by the spark plug. Increased short-distance operation and poor engine oil quality can shorten the intervals.
Width across flats: 21mm
Thread diameter: 14.0mm
Thread length: 19.0mm
Electrode gap: 0.8mm
Resistance: suppressed, 5kOhm
SAE nut can be unscrewed
OEM numbers for comparison purposes:
NGK: BR9ES
Bosch: WR 3 CC / 0 242 255 502
Champion: OE 091 / QN 2 / QN 2 C / RN 2 / RN 2 C
Denso: W 27 ESR / W 27 ESRU
14 = B Thread diameter 14mm
R = R (resistor) resistor plug 5kOhm
9 = 9 thermal value
L = E (Long) long plug thread
S = S Standard
Produced according to OEM guidelines of Japanese vehicle manufacturers for perfect repair and durability.
The service life of a spark plug is determined by the fuel type, engine condition, operating times and engine temperature. For 4-stroke engines from 250cc, the plugs should be cleaned or replaced after 6000km. For smaller displacements, especially 2-strokes, approx. every 2500 km. After this mileage, oil carbon deposits lead to starting difficulties and loss of power caused by the spark plug. Increased short-distance operation and poor engine oil quality can shorten the intervals.
Width across flats: 21mm
Thread diameter: 14.0mm
Thread length: 19.0mm
Electrode gap: 0.8mm
Resistance: suppressed, 5kOhm
SAE nut can be unscrewed
OEM numbers for comparison purposes:
NGK: BR9ES
Bosch: WR 3 CC / 0 242 255 502
Champion: OE 091 / QN 2 / QN 2 C / RN 2 / RN 2 C
Denso: W 27 ESR / W 27 ESRU
14 = B Thread diameter 14mm
R = R (resistor) resistor plug 5kOhm
9 = 9 thermal value
L = E (Long) long plug thread
S = S Standard
