Analysis of information sources in references of the Wikipedia article "Yamaha YZ450F" in English language version.
{{cite web}}: Cite uses generic title (help)For model year 2006, the Yamaha YZ125 and YZ250 two-stroke and the YZ250F and YZ450F four-stroke motocross motorcycles all carry titanium shock springs, marking the first time production motorcycles from any manufacturer have been fitted with titanium suspension springs as original equipment, reports Timet Automotive, Morgantown, Pa. Yamaha claims the new springs offer "outstanding strength and fatigue tolerance" and reduce unsprung weight for improved suspension performance.
For model year 2006, the Yamaha YZ125 and YZ250 two-stroke and the YZ250F and YZ450F four-stroke motocross motorcycles all carry titanium shock springs, marking the first time production motorcycles from any manufacturer have been fitted with titanium suspension springs as original equipment, reports Timet Automotive, Morgantown, Pa. Yamaha claims the new springs offer "outstanding strength and fatigue tolerance" and reduce unsprung weight for improved suspension performance.