Gearbox sprocket oil seal dimensions needed please! › Forums › Technical › Two Stroke: Help needed › Gearbox sprocket oil seal dimensions needed please! This topic has 0 replies, 1 voice, and was last updated 3 years, 7 months ago by Neil Wisbeach. Viewing 0 reply threads Author Posts March 21, 2021 at 4:36 pm #13922 Neil WisbeachParticipant Hi everyone! I think the gearbox output shaft oil seal (behind the gearbox sprocket) on a ES125/1 is 35x25x7. Can anyone confirm this? Kind regards, Neil Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In