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
   
N17C
B5HS
N15C
B6HS
NR15C
BR6HS
N15YC
BP6HS
NR15YC
BPR6HS
   
N14C
B7HS + B8HS
NR14C
BR7HS + BR8HS
N14YC
BP7HS + BP8HS
NR14YC
BPR7HS + BPR8HS
   
N12C
B9HS

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

Brisk Spark Plug
NGK cross reference
L17C
B5ES
LR17YC
BPR5ES
L15C
B6ES
LR15C
BR6ES
L15YC
BP6ES
   
L14C
B7ES + B8ES
LR14C
BR7ES + BR8ES
L14YC
BP7ES + BP8ES
LR12C
BR9ES
   

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

Brisk Spark Plug
Champion cross reference
   
N17C
L86C + L90C
N15C
L82C + L86C**
NR15C
RL82C + RL86C**
N15YC
L87YC
NR15YC
RL87YC
 
N14C
L78C + L82C**
NR14C
RL78C
N14YC
L78YC + L82YC
NR14YC
RL82YC
 
Note ** = alternative for hard or summer use

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

Brisk Spark Plug
Champion cross reference
L17C
N5 + N5C
LR17YC
RN11YC + RN12YC
L15C
N4 + N4C + N5C**
LR15C
RN4C
L15YC
N9YC + N10YC
 
L14C
N2C + N3C
LR14C
RN2C + RN3C
L14YC
N7YC + N8YC
LR12C
RN1C
 
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
£3.00
£1.20
 
Any 2 N or L series plugs
£6.00
£1.80
 
Any 3 N or L series plugs
£9.00
£1.80
 
Any 4 N or L series plugs
£12.00
FREE
     
Any 6 N or L series plugs
£18.00
FREE
 
Any 10 N or L series plugs
£30.00
FREE
 
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 + late R100 mono shock
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 Guzzi V50 small block twins
L14C
Moto Guzzi 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.

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

Make and Model
Brisk Plug
Alfa Romeo Alfasud 1.3 + 1.5
L14C
Austin Allegro all engines
L15YC
Austin Mini 850, 1000, 1275
L15YC
Citroen 2CV 602cc
N15C 
Fiat 126 air cooled
NR14YC
FSO 125P + Polonez
L15YC
Jaguar XJ6 2.8 Series 1
L14YC
Lada 1200, 1300, 1500
LR17YC
MGB 1.8
L15YC
Reliant Robin 750 + 850 pre 1996
LR17YC
Renault 4 750, 850, 1100
N15YC
Make and Model
Brisk Plug
Rover P6 2000, 2200
L15YC
Saab 99 Turbo
L14YC
Skoda Estelle 105, 120, 130
N15YC
Trabant 601 2-stroke
NR14C
Triumph Spitfire 1300
L15YC
Vauxhall Viva HB, HC, 1200, 1300
L15YC

If you require resistor plugs simply insert the letter R after the L or N
In most cases the small additional resistance will not weaken the spark.

If your vehicle is not listed but you know the recommended NGK plug
please use the cross reference near the top of this page


The not very small print. Cross references are supplied for information only, we have trawled the internet and spent many hours cross referencing plugs back and forth, looking up vehicles and taking notes of various recommendations in owners forums. However owners make changes to vehicles over time, for example raising the compression, skimming heads or fitting different cams. Also vehicles are driven differently, one owner may potter about and require a plug that gets up to temperature quickly (Hotter Plug) where as another owner may spend all of their time at higher speeds doing longer journeys so would benefit from a colder plug. When ever you change plugs we would always advise to have a quick look at it after a trip of 15 to 20 miles. If it is spotlessly clean with no deposits at all even where the base of the thread is touching the head, you should move to one grade colder (from L15C to L14C for example). If the plug is dry and sooty, even at the hottest part of he electrode tip you should consider riding harder, or changing a plug one grade hotter (from N14C to N15C for example. F2 Motorcycles Ltd are not responsible for any damage caused by incorrect plug selection.

We are always happy to learn from real life experiences and keen to hear your feed back, so if you see any plug reference for a vehicle you own that you feel may be incorrect please let us know.

 

Order by phoning 01945 410165 - 2pm to 5pm Tuesday to Saturday

 

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