November 16, 20169 yr That's interesting, all 3 of my late model Bultacos have red, I vaguely remember earlier ones having yellow
November 16, 20169 yr The colour is related to the hardness of the alloy. If I remember right... yellow softest, red medium and green hardest.
November 16, 20169 yr My 1981 Ossa gripper has red stickers, yes they relate to the hardness but the harder ones are also heavier.
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