Valve guide reamer handle

NOTE:

Insert the reamer from the combustion chamber and always turn the reamer handle clockwise.

Yamaha Valve Guide ToolWidth The Valve Seat

VALVE SEAT WIDTH

• Coat the valve seat uniformly with Prussian blue. Install the valve and attach a valve lapper onto it. Tap the coated seat with the valve face in a rotating manner, in order to obtain a clear impression of the seating contact.

froSh 09916-10911: Valve lapper set

• The ring-like dye impression left on the valve face must be continuous without any breaks. In addition, the width of the dye ring, which is the valve seat width, must be within the following specification.

CM Valve seat width ®

If the valve seat is out of specification, re-cut the seat.

VALVE SEAT SERVICING

The valve seats © for both the intake and exhaust valves are machined to two different angles. The seat contact surface is cut at 45°.

45°

INTAKE N-122

EXHAUST N-122

15°

N-121

N-121

froSh 09916-21111 : Valve seat cutter set 09916-20610: Valve seat cutter (N-121) 09916-20620: Valve seat cutter (N-122) 09916-24311: Solid pilot (N-100-5.0)

NOTE:

Use the solid pilot (N-100-5.0) along with the valve seat cutter (N-121 and -122).

A CAUTION

The valve seat contact area must be inspected after each cut.

Bandit 600 Pair System

• When installing the solid pilot ©, rotate it slightly.

Suzuki Marauder With Pair Valve Removed

• Seat the pilot snugly. Install the 45° cutter attachment (3) and T-handle (4).

09916 20620

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