Suzuki RM250 Owner's Service Manual page 89

6-14 CYLINDER, PISTON AND EXHAUST VALVE
• Remove the exhaust valve shaft retainer 0.
EXHAUST SIDE VALVE (LH)
• Remove the side valve cap 1 and gasket.
• Remove the spacer, exhaust valve cam and exhaust side
valve in the same manner as the right side.
• Remove the spring cap 2.
• Remove the gasket 3 and return spring 4.
EXHAUST MAIN VALVE
• Remove the exhaust valve cover 1 and gasket.