1987-2004 Kawasaki Mojave KSF250 Service Manual, Page 58Get this manual
ENGINE TOP END 4-11 (2) If compression is released while the engine is running, the weights are not swinging outeRe move the spring and move the weights back and forthIf the weights do not move easily from the retracted position, replace the KACR unit, exhaust camshaft, and exhaust rocker arm as setRetracted or Rest Position (compression is released) If any clearance exceeds the service limit, measure the diameter of each camshaft journal with micrometerCamshaft Bearing Clearance Standard 0.0450.073 mm Service limit0.16 mm
If the camshaft journal diameter is less than the service limit, replace the camshaft with new one and measure the clearance againCamshaft Journal Diameter Standard 22.940 22.955 mm Service limit22.91 mm
If the clearance still remains out of the limit, replace the cylinder head
Camshaft Bearing Oil Clearance Inspection The journal wear is measured using plastigage (press gauge), which is inserted into the clearance to be measuredThe plastigage indicates the clearance by the amount it is compressed and widened when the parts are assembledeCut strips of plastigage to journal widthPlace strip on each journal parallel to the camshaft with the camshaft installed in the correct position and so that the plastigage will be compressed between the journal and camshaft cap, elnstall the camshaft caps, tightening the bolts in the correct sequence to the specified torqueNOTE