2004-2005 Honda TRX450R Factory Sevice Manual, Page 33Get this manual
TECHNICAL FEATURES
U NICAM SYSTEM
OUTLINE
The Hundo UniCorn b""" "inglo "om,hoft (SOKCI ond one-pieco camshaft holdcrThe camshah act5 directly on the into'o valves while tbe exhaust valves are loya U-shaped railer rocker armThis UniCorn de'ign;, lighter nnd mom compact tban dual overhcad cam5hdh WOHC) cylinder head oylinder head incurporilles narrOw "nd deg,ee volw
DECOMPRESSOR ARM
UniGarn
DECOMPRESSOR WEIGHT
U-SHAPED ROLLER ROCKER ARM
The exl,"" mllc, rocker arm is U-shapcd to fit around the centrally
spark plug,
AUTO-DECOMPRESSION SYSTEM
DURING START-UP lOR WHEN ENGINE IS OFFI