We have been getting good feedback from the KAMAs we have brought in. The KAMA is made by Shandong, the dominant supplier of tractors in the 30HP class in the Chinese home market. Yancheng, who make Jinma and the rebaged Jinmas sold under a cornicopia of names ships most of its production to the USA and is little known to the Chinese home market. The larger Jinma is a new design, the KM series KAMA has been around longer and was developed with the cooperation of Duetz-Fahr, hence constant mesh transmission gears, wet disk brakes and planetary final drive, all are unusual on Chinese tractors today.
We sell a lot of JInma tractors too up to 30 HP. The TaiShan models sort of overlap the Jinmas, but are heavier built and sell for a little more money than the JInmas. The 200 series JInma was originally designed as an 18HP tractor where the 25HP TS series from Shandong was originally designed for 30 HP, so there is about 400lbs of weight difference, in some cases this is an advantage in others not. so we sell both.
It is true that there are more stocking locations of Jinma parts than KAMA, but we have worked hard to build a viable spare parts supply here in Akransas for the tractors we import. We have been able to supply parts on a special order basis for older TS tractors, going back into the early 90s also, don't see many older Jinmas. We are not the only source for KAMA parts in the USA.
The big thing is that TaiSHan made only 2 cylinder tractors till a little over a year ago when they addopted the Y 385 and the 485 engines, which along with new fiberglass hoods make this tractor a great value today.
Hope this helped, its getting too long if there is a specific question, I will try to answer...