Recent content by Matias

  1. M

    Kubota 400 ci backfire issue

    I'm back on the mission and, surprisingly, actually made some progress. I adjusted the valves and then took it for a spin with no change. There was a bit of extra slack I had to take out, but nothing excessive. Only 456 hours on this Kubota btw. I then added regular Seafoam into the gas tank...
  2. M

    Kubota 400 ci backfire issue

    Looks like it's .11 to .16 mm (.0044 to .0063 in) for both. Screenshot attached. Also, here is a link to the workshop (service) manual: https://www.kubota.cz/data/soubor/WSM_RTV400_EN.pdf I'm having the same issue here. So far I've done engine oil change, transmission/differential oil change...
  3. M

    Kubota 400 ci backfire issue

    Any updates on this? Having same issue with backfiring and low power at higher speeds. Changed engine oil & filter, changed transmission and diff oil, both air filters, spark plug (BR6HS), fuel injector (FBYCG50), added inline fuel filter, and swapped out battery. Slight improvement, but issue...