Question about 1982 Yamaha XJ 400
You may have issues with;
Fuel flow, check filter for blockage, line for obstructions and floatbowl needle and seat for dirt.
Air/fuel mix. Clean carby with a aerosol carby cleaner and check operation of slide needles (rise/fall in unison)
Sparkplug; Reset gaps or replace if wary.
Top End, is camchain tensioner working, any undue valve train noise, has it been serviced at all.
Electrical. Check wiring connections and plugcaps, coil earthed and pluglead free of other wiring.
Posted on May 30, 2010
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Posted on Jan 02, 2017
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