Police said the attack happened on a dirt track near the gas works off Castlegreen Street at about 10.20pm.
The man was taken to Royal Alexandra Hospital in Paisley for treatment. His injuries are considered serious but not life-threatening.
Detectives are appealing for witnesses or any drivers with dash-cam footage in the area at the time to come forward. Specifically, they want to identify two men who are aged between 17 and 20.
One suspect is described as being around 5ft 9ins tall and of slim build. He was wearing dark trainers, dark jogging bottoms and a dark top - either a hoodie or jacket - with the hood up.
The other suspect was around 5ft 5ins tall and of medium build. He was wearing dark trainers, jogging bottoms and a grey jacket with the hood up. The jacket is a synthetic shiny material.
DC Aislinn MacLeod, of Clydebank Police Station, said: "Our enquiries into this incident are ongoing and anyone with information is asked to come forward.
"If you were in the area and saw or heard something suspicious then please get in touch. Similarly if you were driving in the area and may have dashcam footage then please review this and come forward if you believe you can help our investigation.
"Please call 101 with any information, quoting incident 5116 of 17 April, or call Crimestoppers anonymously on 0800 555 111."