my spacer is 1/2" in also i bought a cr125 rad valve so it came with the solid intake. i dont reccommend the rad valve unless you have a cfm box or a custom box that is movable because of how i had to mount the carb. so just get a standard reed cage or vf3's. if you buy the cr intake boot it will fit your carb i believe cr125 carbs are 34mm. if you have any other questions feel free to ask. also n8tesnastyblasty and chutzell are also quite experienced with this
