Naraku spark plug as fitted ex works in the vehicle. Thermal value and spark plug design correspond to the original.
Produced according to OEM guidelines of Japanese vehicle manufacturers for a perfect repair and long service life.
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 screwable
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 a perfect repair and long service life.
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 screwable
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
