ive got a similar problem, exept my right arm is smaller and weaker then my left, instead of the other way around. (no im not a lefty) and im curling with 20 pounds more in each hand. its still the same thing though, ill do the stuff you guys suggested next time i do arms (3 years from now, ).

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age: 18
height: 5'9"
weight: 198bs
bench 1RM: 275
parallel squat 1RM: 385
deadlift 1RM: N/A
hang clean 1RM: N/A

i wish i could live on crack and protien shakes...