THIS GY6 157QMJ ENGINE RIGHT CRANK CASE COVER NOT ONLY FOR HAMMERHEAD,YERF DOG,TOMBLIN CROSSFIRE....150CC GO KART, BUT ALSO FOR ALL BRAND CHINA MADE ATVS, SCOOTERS BY USING GY6 157QMJ, 152QMI ENGINES

if you need center oil seal, please order ebay item# 160652700794  20 x32 x6