Make & Model	Original Champion	Modern Champion	NGK Part	Gap
150cc Terrier, T20, T20C, T20T, T20SL, Tiger Cub, T20SH, TR20	L7 L82C B6HS .020”			.020”
Trials Cub, Super Cub, Sports Cub, TS20 Scrambler				.020”
3T, 5T Speed Twin, 6T Thunderbird, TR5 Trophy, Cast Iron				.020”