2001-2003 Honda TRX500FA Factory Service Manual, Page 133Get this manual
CYLINDER HEADVAlVE
CYLINDER COMPRESSION
Warm up the engine to ormal ope ati ng temper a-
COM PRESSION GAUGE
ture Sto he enginediscon nect th sp ark lug cap and remov th spa rk plug (page 3-7 )Install the compressio gauge into the spark pl ug
ho leShift the transmission neutra lOp en th ttuortte all th ay and crank the engine wi he starter motor unt il th gauge read ing stops risi ngThe maximum reading is usuenv reached within 4-7 seconds