Honda XR400R Engine Work Photos by ThumperTDC on 4Strokes.com

4Strokes.com Honda Technical: Pictures of XR400R Engine Work by ThumperTDC

Engine with valve cover removed.

Valve cover and all screws on work bench.

Underside of valve cover.

Camshaft and cam gear.

Cylinder head on engine.

Cylinder head removed.

Cylinder head and valves after cleanup.

Close-up of auto decompression mechanism.

After porting. Sorry no before picture.

Piston after cleaning.

Exhaust header with excessive weld removed.

Vise and pipe to remove auto decompression mechanism.

Camshaft with auto decompression mechanism removed.