1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 207Get this manual
IGNITION SYSTEM
IGNITION COil
REMOVAL
Remove the spark plug cap from the spark plugDisconnect the ignition coil primary wire and remove the igni tion coil
INSPECTION
CONTINUITY TEST
Measure the primary coil resistanceRESISTANCE; 160.2
Remove the spark plug cap from the wire and measure the secondary coil resistance RESISTANCE; 3.6-4.5 kO
PERFORMANCE TEST (Except .S.A.I
Check the ignition coil with COl tester(1) BLACK TERMINAL