Question about 1987 Yamaha XS 400 DOHC
2.3 4 cyl? if so ,bet on the ignition coil adapter,they crack and let the spark go crazy,easy to change,about 50 bucks for a new one,
under the ignition assembly,4 bolts and you can look at it,if it's white
it's most likely factory and had it.
Posted on Nov 25, 2013
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Posted on Jan 02, 2017
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