GY6 engine belt, scooter parts, scooter engine belt 1) model:669,743,729,788,842,835 2) ... pass 200 hours test 3) CR or EPDM, GY6 engine belt, scooter parts, scooter engine belt1) model:669,743,729,788,842,8352) pass ... long service life4. EPDM rubber and Kevlar cord available 5. ATV belt for 700-800 CC belt available