一、黄河川崎250型摩托车,更换气门导管时,要将气缸盖加热到____度。在更换气门导管时,同时更换导管____。导管压入的高度要与原来的一样。 二、黄河川崎250型摩托车的正时链条张紧力是____调整的,但在怀疑正时链条是否张紧时,可以____正时链条张紧器的锁紧螺栓, First, the Kawasaki 250 motorcycle in the Yellow River, when changing the valve guide, the cylinder head should be heated to ____ degrees. When replacing the valve guide, change the catheter ____ at the same time. The height of the catheter should be the same as the original. Second, the Yellow River Kawasaki 250 motorcycle timing chain tension is ____ adjustment, but in doubt when the chain is tightened, you can ____ timing chain tensioner locking bolts,