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:

Cushion rod removal and installation
Removal Remove the right side cowling and side frame covers. Refer to “exterior parts removal and installation” in section 9d . Support the motorcycle with a jack to relieve load on the cushion rod. Remove the muffler chamber. Refer to “muffler / muffler chamber / exhaust ...

Oil pressure regulator / oil strainer inspection
Refer to “oil pan / oil pressure regulator / oil strainer removal and installation” . Oil pressure regulator Inspect the operation of the oil pressure regulator by pushing the piston with a proper bar. If the piston does not operate smoothly, replace the oil pressure regulator with a new on ...

Camshaft inspection
Refer to “engine top side disassembly” . Refer to “engine top side assembly” . Camshaft identification The exhaust camshaft has the embossed letters “ex” and the intake camshaft has the embossed letters “in”. Cam wear Check the camshaft for wear or damage. Measure the cam height “a” w ...