2005-2009 Kawasaki Brute Force 650/KVF 650 4x4 Service Manual, Page 128Get this manual
5-20 ENGINE TOP END Camshaft
KACR Inspection
The Kawasaki Automatic Compression Release (KACR) momentarily opens the exhaust valves on the compression stroke at very low speedsThis allows some of the compression pressure to escape, making it easy to turn over the engine during starting Due to the simplicity of the mechanismno periodic maintenance is neededThere are only two symptoms of problems with the KACR mechanism [A]: compression is not leased during starting, and compression is released during running (1) If compression is not released during starting, the weights are not returning to their rest position Remove the camshaft (see Camshaft Removal) Remove the KACR unit (see KACR Removal) Visually inspect the springIf damageddeformed, or missing, replace the spring Remove the spring and move the weights back and forth If the weights do not move smoothly, replace the KACR unitAlso inspect the exhaust rocker arm for any damage, and replace the rocker arm if necessary[A] Rest Position (compression is released) [B] Weights [C] Spring