emyrhunnam
New Member
- Messages
- 5
- Location
- Bridgend, Wales
I've recently been restoring an old Polaris D-Bat 400 quad bike that uses a yanmar l100ae. After fitting the necessary parts I was eager to start it up without an air filter, bad idea. A piece of square cloth about 5cm got sucked up and I immediately turned off the engine. Since this I have had no compession at all. I've removed the head and the valves and piston rings seem to be working fine. There are no obvious cracks on the engine and I fitted a new head gasket whilst it was off. I'm only 17 so I really have that much knowlage at all so any help to troubleshoot this will be much appreciated.