Yanmar YM1900 Clutch, Transmission, PTO Parts. If you need help finding a pressure plate, clutch disc, bearings, or even alignment tools for your Yanmar, contact us here.. Most parts listed below are new, but we can also provide remanufactured clutch part or often rebuild your core. Call for details. Also be sure to view the wide variety of parts available for your YM1900 beyond transmission components.