12:12

HITLIS - Adjusting Governor

4:39

Yamaha YZ 250 Power Valve Rebuild the Easy Way

6:18

How the Power Valve works | Offroad Engineered

4:44

What is HITLIS?

12:21

Rebuilding A 2 Stroke Power Valve | RM250 Rebuild 13

27:39

Yamaha YZ250 & YZ250X Bottom End Rebuild | Part 1: Engine Disassembly

34:26

YZ250 powervalve rebuild

16:32

YZ250x vs YZ250 series Clutch comparison and general inspection.