Rebuild a Yamaha Autolube Oil Pump

Reader Contribution by The Motorcycle Classics Staff
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As a rule, we try to focus our How-Tos on repairs we think the weekend mechanic can aspire to, so we’ll kick this one off with a qualifying statement: Rebuilding a Yamaha Autolube oil pump requires more than average care and attention.

Our factory Yamaha manual specifically says of the pump, “Make no attempt to disassemble it,” yet it can be rebuilt. Pump failure is typically due to bad seals or, as we found with our 1974 Yamaha DT125, sludged or stuck parts. In our case the spring for the pump shaft had rusted in the compressed position. A previous owner bypassed the pump in favor of premixing the fuel/oil, likely because the pump couldn’t stroke with a stuck spring.

  • Updated on Jun 15, 2016
  • Originally Published on Jan 1, 1753
Tagged with: how-to, July/August 2016, Reader Contributions
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