Yamaha YZ250R Service Manual

Contents

6-3IGNITION SYSTEM ELECEC622001SPARK GAP TEST1. Disconnect the spark plug cap from sparkplug.2. Connect the dynamic spark tester 1 (igni-tion checker 2 ) as shown.9Spark plug cap 39Spark plug 4A For USA and CDNB Except for USA and CDN3. Kick the kick starter.4. Check the ignition spark gap.5. Start engine, and increase spark gap untilmisfire occurs. (for USA and CDN only)EC624000COUPLERS AND LEADS CONNECTIONINSPECTION1. Check:9Couplers and leads connectionRust/ Dust/ Looseness/Short-circuit Repair or replace.EC625002“ENGINE STOP” BUTTON INSPECTION1. Inspect:9“ENGINE STOP” button conductNot continuous while being pushed Replace.Continuous while being freed Replace.Minimum spark gap:6.0 mm (0.24 in)Tester (+) leadBlack/White lead 1Tester (–) leadBlack lead 2B/W B1 2PUSH INFREETester selec-tor positionΩ × 1ååB