Redline 53H engine noise

[Suzuki_kid_1984]

Which fuel brand BASS? Coolpower?

[BASS 666]

OPTIFUEL OPTIMIX 20 super slv mate. its the only fuel i can get over here.. but if you use any 20% fuel you should shim the head with the shim provided with the engine..

[Raptormad2]

Hi most of us at our club use optifuel 20% slv, i run both my redline 53s as they come with no extra shim on the head with no problems,

[BASS 666]

it will run fine.. it just says to put the shim in if you use 20%....