Article by Ryan
I took some measurements from my original 1972 SL125 gas tank for proper placement. This is for 1972 only, 1971 and 1973 used different decals. This tank has some "knee" dents on it so hopefully that won't affect the measurement too much.
Center stripe width: 3.285"
Center stripe to side stripe: 1.505"
Left Side Stripe to H center: 1.300
1972 Honda SL 125 Gas Cap Opening to Warning Label: 1.100
Right Side Top of A to Back of Stripe: 1.550
Right Side Bottom of A to Back of Stripe: 1.215
Left Side Top of H to Back of Stripe 1.240
Left Side Bottom of H to Back of Stripe: 1.575
Front of tank center to Left Stripe Edge: 1.112
Top of A to Bottom of Stripe 1.040