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surge
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Surging engine, hanging RPMs, black spark plugs?
Howdy again! The old boy's developed fun new issue after a cold snap kept me off two wheels for a week. Last change I made was checking my plugs and noticing they had a healthy dry black soot deposit on them, so I wire-brushed them off and adjusted my idle mix screws 1/4 turn out to help lean it...- avemachina
- Thread
- air leak black spark plugs high rpm jetting surge
- Replies: 11
- Forum: The Garage
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Charging system mystery!! Professional help needed!! it's....complicated
Hey guys... Really need some help trying to sort out my '79 XS400. I've had some major issues along the way since day one with this machine and I'm close to calling it quites. If I don't soon my wife is going to force it!!! Background: I bought a 1979 Yamaha XS400 with 18000 kms on it. Has...- motoman1979
- Thread
- backfire charging choke difficulty starting rectifier regulator stator surge wiring harness
- Replies: 8
- Forum: The Garage