BONA 90HP Tractor: ISO9001; High transmission efficiency; Low tremble; High traction; High adaptability and easy start. BN900/904 TractorModel: BN900/904Features of BN900/904 Tractor:1. BN900/904 tractors are 90hp tractors, specially used in mountain areas and muddy roads.2. It is adopted Chinese famous brand YTR engine, which has a big rated power, low noise, low emissions, in line with the ...