Kit includes a dial indicator with extensions and a 14 mm spark plug thread adapter
Allows inspection and adjustment of ignition timing
Scaled in millimeters
Designed to clear frame tubes on most recent water cooled models
Gauge face size 48mm
Due to limited space between the cylinder head and upper frame rails, Two stroke timing kit 890133 with adapter kit 890134 does not fit on Yamaha RD two stroke twins with the engine installed in the frame. It does work on Yamaha RD two stroke twins with engine out of frame.