Onroad Micro Builds AMZ BZ 4WD 1/27th Belt Drive Micro 4WD Touring Car This is a build guide with some tips on Atomic RC's AMZ BZ 4WD 1/27th Micro 4WD Touring Car. Click the image to see the build page. AMZ 4WD 1/27th Micro 4WD Touring Car This is a build guide with some tips on Atomic RC's AMZ 4WD 1/27th Micro 4WD Touring Car. Click the image to see the build page.