Motion Pro Adapt Kit for Air-Cooled Engine

Kit includes an extended thread adapter and dial indicator extension. Allows Water-Cooled 2-Stroke Timing Kit (08-0250) to be used on air cooled engines with 14mm spark plugs. Adapter kit does not allow two stroke timing kit 08-0250 to be installed on Yamaha RD two stroke twins when the engine is in the frame. Adapter kit 08-0249 with two stroke timing kit 08-0250 does work with engine out of frame. Adapter length installed is 55 mm. Outside diameter is 19 mm.