Yamaha Motor Co., Ltd. YFM7FGPW — CRANKCASE

EBS00332 SEPARATING THE CRANKCASE 1. Separate: right crankcase left crankcase MMM M M MMM M M MMM M M MMM M M MMM M M MMM M MMM a. Remove the lead holders and crankcase bolts. NOTE: _ Loosen each bolt 1/4 of a turn at a time and after all the bolts are loosened, remove them. Loosen the bolts in numerical order (see numbers on the illustration). И И Left crankcase Й Right crankcase b. Remove the right crankcase. CAUTION: _ Use a soft hammer to tap on one side of the crankcase. Tap only on reinforced portions of the crankcase. Do not tap on the crank- case mating surfaces. Work slowly and carefully. Make sure that the crankcase halves separate evenly. Й c. Remove the dowel pins.

LLL L L LLL L L LLL L L LLL L L LLL L L LLL L LLL EBS00335 CHECKING THE TIMING CHAIN AND GUIDE 1. Check: timing chain Cracks/stiff Replace the timing chain and camshaft sprocket as a set. 2. Check: intake side timing chain guide Wear/damage Replace. 4 CHECKING THE RELIEF VALVE 1. Check: spring seat 1 spring 2 relief valve body 3 relief valve 4 Damage/wear Replace the defective part(s). 3 2 1 4 - 72 CRANKCASE ENG