THIS GEAR HAS BEEN UPDATED TO A STEEL GEAR- Out of stock
HiSun does Not offer this Gasket, so the Yamaha is the Exact Same. 
Same Impeller 19721-003-0000 Fits 250, 400, 800, 1000
This Metal Pipe Fits into the Water Pump and routes water to the Cylinder and has a Rubber Hose (Water Pump, Pipe 3, # 19273-115-0000) to Connect it.
This is a 'L' Shaped Rubber Hose from Metal Pipe to Cylinder
Same As Part # P01300039100000
