What is your opinion of the Kioti engine versus the Kubota engine?
I have had 15 years of almost trouble free use out of my Kubota.
I've heard some stories about the Kioti engine not being any good with all the emissions that have been put on it.
New tractors over 26-horsepower meet stringent Tier IV emission rules, which necessitated two stages of emission upgrades over older models.
Primary Tire IV emission reduction occurs within redesigned engines during combustion. Bonus is an increase of two to four horsepower in redesigned engines.
DPF is the second stage (Diesel Particulate Filter), incinerating diesel soot accumulated during 40 to 60 engine hours of operation to a few grams of carbon/ash during regeneration, ash then exits the DPF in the form of carbon. .
Diesel Particulate Filter supersedes tractor muffler.
At some point in time DPF needs to be replaced.
At some point in time tractors with mufflers need the muffler replaced.
The cost of DPF and the computer chip which monitors soot accumulation increases Tier IV compliant tractor cost. Computer chip also adjusts electronic fuel injection.
Kioti, Kubota and most other tractor engines use DPF to meet Tier IV emission standards. Neither Kioti nor Kubota can be deemed better than the other on the issue of emissions technology.
If you can restrain yourself after firing up your own tractor (few do) you could find a < 25.4794 horsepower / 100 cubic inch, 2,700 pound bare weight tractor with 4-WD and a three (3) range HST transmission sufficient. Tractors < 25.4794 horsepower are exempt (for now) from strict Tier IV emission standards and the associated paraphernalia. Exhaust is dirty.