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  • Burning Oil

    January of this year i removed my 1600 engine and completely disassembled it to replace the 2nd/3rd pinion gear in the transmission due to all 3 gear dogs that had broken off. Prior to that the engine never blew any smoke. I replaced both compression rings and the oiler ring on both pistons since i had the engine apart that came in a kit together. The bike now runs beautiful with lots of power and shifts like butter and i'm very pleased. But in the past few days when starting it cold its smoking bad from the exhaust pipe but then disappears once the engine warms up and the choke is pushed in. Yesterday out for a ride a friend was following me and said he noticed smoke coming from the exhaust only happening when i roll off the throttle and not on acceleration. When i had the engine apart i did not replace the valve seals. Does this sound like a valve seal issue or maybe something else? When i replaced the rings i staggered the openings to 70 degrees on both compression and oil ring so i'm sure the oil is not coming up from the bottom. Hopefully. Thanks.
    "It's not the destination...it's the ride"

  • #2
    If you didn't touch the valves, I would say they are not your problem.
    Sounds like the rings to me. Did you follow the procedure in the service manual. Rings have a top and bottom to them and it does make a difference. Also should be markings for the order they are installed.
    Click image for larger version

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    • Sharpman66
      Sharpman66 commented
      Editing a comment
      Yes i installed them correctly to the procedure in the Clymer Service manual. Checked and rechecked. I've checked the oil level and it hasn't changed and i don't smell burnt oil when i'm riding.

  • #3
    Are you sure it is oil? Re-ringing the engine may have changed (improved) the compression and vacuum. Could it be black smoke instead of blue smoke? You are only seeing smoke when the enricher (choke) or the coast enricher is engaged.

    Comment


    • MikeyC
      MikeyC commented
      Editing a comment
      On decel as also. Sounds like valve guides but wondering about rings, right side up or up side down.

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