Triumph spark plug guidance table. This table will give you the original spark plug number code, the gap of the plugs & the modern day equivalent spark plugs from Champion & NGK.

Triumph Spark Plug Guide

 

 

 

 

 

 

 

 

 

Models

Original

Champion

NGK

Gap

 

 

 

 

 

 

 

 

 

 

150cc Terrier, T20, T20C, T20T

 

 

 

 

T20SL, Tiger Cub, T20SH, TR20

L7

L82C

B6HS

0.020"

Trials Cub, Super Cub, Sports Cub

 

 

 

 

TS20 Scrambler

L5

L82C

B6HS

0.020"

3T, 5T Speed Twin, 6T Thunderbird,

 

 

 

 

TR5 Trophy, Cast Iron

L7

L82C

B6HS

0.020"

TR5 Trophy Alloy, TR5A, 6T Alloy

N4

N4C

B7ES

0.020"

T100, T110 Cast Iron

L5

L82C

B6HS

0.020"

T100, T100S, T100T, T110 Alloy

 

 

 

 

21 5TA, T100A, TR7A, TR25

N4

N4C

B7ES

0.020"

Tiger 100C, T120TT (gap 0.16")

N57R

C57R

B10EG

0.016"

Grand Prix 500cc (gap 0.16")

L54R

L84R

 

0.016"

Other Over Head Models 14mm

L7

L82C

B6HS

0.020"

OVH 18mm

K9

D9

A6

0.020"

SV Models 14mm Except TRW

L10

L86C

B6HS

0.020"

SV Models 18mm

7

L82C

B6HS

0.020"

Model TRW SV (army)

L5

L82C

B6HS

0.020"

Tiger 90

N4

N4C

B7ES

0.020"

TR6, T120 pre 1968

N4

N4C

B7ES

0.020"

1968 Onwards

N3

N3C

B8ES

0.020"

T150 Trident

N3

N3C

B8ES

0.020"

T140

N5

N5C

B6ES

0.020"

TR65

N5

N5C

B6ES

0.020"