Suzuki GSX-R 1000 Service Manual: Valve seat repair

Suzuki GSX-R 1000 Service Manual / Engine / Engine mechanical / Repair instructions / Valve seat repair

The valve seats (1) for both the intake and exhaust valves are machined to three different angles. The seat contact surface is cut at 45°.

Suzuki GSX-R. Valve seat repair

Intake valve
Exhaust valve

Suzuki GSX-R. Valve seat repair

Caution

the valve seat contact area must be inspected after each cut.
Do not use lapping compound after the final cut is made. The finished valve seat should have a velvety smooth finish but not a highly polished or shiny finish. This will provide a soft surface for the final seating of the valve which will occur during the first few seconds of engine operation.
The titanium valves are coated with an oxidized membrane treatment to resist wear but the membrane tend to removed if lapped after valve seat servicing.

Note

after servicing the valve seats, be sure to check the valve clearance after the cylinder head has been reinstalled. Refer to “valve clearance inspection and adjustment” in section 0b .

Valve guide replacement

Remove the cylinder head. Refer to “engine top side disassembly” . Remove the valves. Refer to “cylinder head disassembly and assembly” . Using the valve guide remover, drive the va ...

Engine bottom side disassembly

Note the crankcase must be separated to service the crankshaft and conrod. Remove the engine assembly from the frame. Refer to “engine assembly removal” . Remove the e ...

Other materials:

To sensor removal and installation
Removal Remove the ap sensor. Refer to “ap sensor removal and installation” . Disconnect the coupler (1) and remove the to sensor (2). Installation Install the to sensor in the reverse order of removal. Pay attention to the following point: when installing the to s ...

Ect sensor inspection
Refer to “dtc “c15” (p0115-h/l): ect sensor circuit malfunction” in section 1a . Inspect the ect sensor in the following procedures: remove the ect sensor. Refer to “ect sensor removal and installation” . Connect the ect sensor (1) to the circuit tester and place it in the o ...

Crankshaft thrust clearance inspection and selection
Refer to “engine bottom side disassembly” (page 1d- 49). Refer to “engine bottom side assembly” . Inspection With the crankshaft’s right-side and left-side thrust bearings inserted into the upper crankcase. Measure the thrust clearance “a” between the leftside thrust bearing and ...