IAbovel A technician and a translator explain computerized test to
determine the natural vibration frequency of a frame. The frame is set on a
foam pad and wired to the computer. Then a wired hammer lIeftl is
tapped on the frame.IBelowl The computer analyzes and displays the
vibration frequencies. That's Allan Girdler of Cycle World at the hammer.
The test allows designers to make sure engine natural frequency does not
match that of the frame, thus minimizing"overall vibration.
--.
ILeftl XS650s head thrciugh the air to meet packing crates for export. ILeft,
belowl Some of the Yamaha Motor Co., Ltd. Directors. From left, H. Eguchi
Isales), President H. Koike, F. Nemoto lengineering and manufacturingl,
S. Tanaka (four-stroke engine and motorcycle engineeringl and N. Hata.
Iresearch and developmentl.IBelowl Editor asks question while Cook
Neilson of Cycle ponders.
/
27
