We have been using Brisk spark plugs for over a decade as they are original equipment fitted to some of our motorcycles.
In the past, when they eventually needed changing we swapped them for easily available alternatives from well know manufacturers.
Strangely the replacement plugs did not last as long and did not run as well.
We contacted Brisk and are now please to offer a range of plugs to suit many traditional motorcycles.
We urge you to try them and find out just how good they are.


Made in Europe, Established 1935

N-Series. M14 x 1.25 short reach.
Y indicates a projected insulator
R indicates internal resistor

Brisk Spark Plug
NGK cross reference
N15C
B6HS
NR15C
BR6HS
NR15YC
BPR6HS
   
N14C
B7HS + B8HS
NR14C
BR7HS + BR8HS
NR14YC
BPR7HS + BPR8HS
   
   
   

L-Series. M14 x 1.25 long reach.
Y indicates a projected insulator
R indicates internal resistor

Brisk Spark Plug
NGK cross reference
LR17YC
BPR5ES
L15C
B6ES
LR15C
BR6ES
L15YC
BP6ES
   
L14C
B7ES + B8ES
LR14C
BR7ES + BR8ES
L14YC
BP7ES + BP8ES
LR12C
BR9ES
Heat Range.
Brisk spark plugs have a very wide heat range, there is no 13 or 16 so they cover most motorcycle needs with just 4 different heat ranges.

This wide heat range is very useful for older type engines running carburetors.

Brisk plugs recover well from over rich mixture due to excessive choke of flooding on start up.

They continue to function well even on a feathered throttle at speed when a carburettor may be a little lean.

They will not cure incorrect carb set up, but they tolerate small variations in mixture very well indeed.

We find this wide heat range also helps them stay cleaner when fitted to classic 2-strokes.

Reliable Spark Plugs at an Affordable Price

   
Price
P&P
 
Any N or L series plug
£2.10
£1.20
 
Any 2 N or L series plugs
£4.20
£1.80
 
Any 3 N or L series plugs
£6.00
£2.40
 
Any 4 N or L series plugs
£7.80
£2.40
 
Any 10 N or L series plugs
£18.00
£6.00
 
 
All prices include VAT

Fitment Guide for just a few motorcycles.
This is a guide only, please double check original specifications in your owners manual or cross reference against the NGK recommendation.

NOTE - If you require resistor plugs simply insert the letter R after the L or N

Make and Model
Brisk Plug
AJS OHV most OHV models taking 14 mm short reach plugs
N15C
Ariel Leader/Arrow
L14C
BMW R80 R80RS R80RT etc
L15YC
BMW R100 R100GS R100RT etc
L14YC 
BSA Bantam D1 - D7 short reach
N15C
BSA Bantam D10 - D14 long reach
L15C
BSA A10 A50 A65 non competition
L14C
Harley Davidson 1340 Carburetor bikes
LR17YC
Jawa - CZ most models to 2010
N14C
Jawa 350 twins from 2010 (electric start models)
NR15C
Matchless most 1950 to 1964 alloy head non competition
L15C
Make and Model
Brisk Plug
Moto Guzzii V50 small block twins
L14C
Moto Guzzii T3-G5 Big twins with carburetors
L15YC
MZ 250 points models
N14C
MZ 250 electronic ignition
NR14C
Royal Enfield (India) 350
N14C
Royal Enfield (India) 500 points
L14C
Royal Enfield (India) 500 fitted with electronic ignition
LR14C
Royal Enfield (India) Electra X 500
LR12C
Triumph T120 650cc
L14C
Triumph T140 750cc
L15C
Ural 650 OHV
NR15YC
Ural 750 OHC carburetor
NR14YC
Ural 750 OHC EFI
NR15YC
Vespa 125E
NR14C
Villiers engines using 14mm short reach non competition
N15C
Internal Resister.
Resistors are fitted to spark plugs to reduce electrical noise, they act as a suppressor.
However many spark plug caps already have suppressors fitted, so you may not need both.
Our advice is as follows.
Bikes running magneto ignition should not have suppressor plugs or caps fitted, unless you are constantly annoying the neighbours, in which case maybe consider using a suppressor plug or cap.
Bikes running coil ignition either with points or electronic ignition should use either a suppressor plug or cap. A good coil will produce so much energy that the strength of the spark at the plug will be almost unchanged by the suppressor. You will not be able to tell the difference.
Bikes fitted with high power ignition systems and sensitive modern electronic dash boards may need both suppressor plugs and caps together.
You should always refer to the original manufacturers recommendations where possible, but note that over time things get changed. For example a manufacturer may specify suppressor plugs because the original motorcycle did not have suppressor caps, but these may have been changed to suppressor caps by a previous owner. Brisk use the letter R after the first letter to indicate it is a suppressed (resistor) plug.
 
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