1987 Honda Fourtrax TRX 250X Service Manual, Page 26Get this manual
MAINTENANCE
SPARK PLUG
Disconnect the spark plug cap and remove the spark plugVisually inspect the spark plug electrodes for wearThe center electrode should have square edges and the side electrode should have constant thicknessDiscard the spark plug jf there is apparent wear or if the insulator is cracked or chippedMeasure the gap wi th wire-type feeler gauge and adjust by carefully bending the side elec-
0.6 -07 mm -L !O.024-0.028 in
m SID ELECTRODE
trode SPARK PLUG GAP: 0.6-0.7 mm (O.0240.02S in)
RECOMMENDED SPARK PLUG: DRSESINGK) X24ESR(NO)
(4) CHECK DEPOSIT DIRT WEAR (3) CHECK' DAM',G' CRACKS
CHECK SEALING DAMAGE