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NGK BPR4HS spark plug will be excellent for running in, adjusting the engine or driving every day in winter with its very hot thermal index (4). Above all, it offers better ignition spark thanks to its prominent insulation.
NGK's BPR4HS spark plug is a very solid, original type short-base spark plug. Use it during your break-in and your engine adjustments, very hot, it has the right temperature to make the adjustments and break-in or to run your original engine all the time or even pushed (kite). It is not made for extreme performance. This spark plug has a 5kOhm resistance (to be accompanied by a 5kOhm resistive interference suppressor), supplied with olive, it has a central copper electrode (normal ) with prominent insulation providing better ignition spark. 
What does BPR4HS mean:
B = Ø14mm base (to be tightened with 20.8mm key)
P = prominent insulation
R = With 5kOhm resistance
4 = very hot thermal index
H = thread length 12.70mm (short base)
S = Central copper electrode
Installs as standard on:
-Moto 50cc
-Quads
-Handling gear ...
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NGK BPR4HS spark plug will be excellent for running in, adjusting the engine or driving every day in winter with its very hot thermal index (4). Above all, it offers better ignition spark thanks to its prominent insulation.
