Yamaha XS360 (1976-1982) [15/34] Yamaha xs360 400

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Yamaha XS360 400 sprocket marks face the left side of the engine and set the valve timing as described in the following steps NOTE Using a new camshaft oil seal is recommended Lubricate the seal lips be fore assembly Use a pin to hold the cam chain tensioner spring in place Be sure the O ring is in place around the right rear cylinder stud Install the O ring and dowel pins on the cylinder studs Tighten the cylinder head nuts and bolts in the order shown Installing the camshaft Install the cam sprocket so that the lines are flush with the head surface 5 To set the cam timing first turn the crankshaft so that the alternator rotor LT mark aligns with the timing mark 6 Position the camshaft so that the locat ing pin faces upwards Position the camshaft sprocket so that the two lines on the sprocket align with the cylinder head surface and the O mark on the sprocket is at the top 7 Fit the cam chain over the sprocket without altering the sprocket s alignment 8 The sprocket bolt holes should be aligned with the cam bolt holes at this point Fit one of the cam sprocket bolts tightening it to 13 16 ft lbs Use a small quantity of a nonpermanent thread locking compound on the bolt threads is recommended Turn the engine over until the other bolt hole is acces 17 On breaker point models install the timing advance mechanism being sure to engage the hole in the mechanism with the pin on the camshaft Tighten the bolt to 6 9 ft lbs Fit the breaker point plate The lead wires pass beneath the top cooling fin Adjust the ignition timing after assembly is com pleted 18 On transistor ignition models install the pick up coil assembly Install the rotor and tighten the rotor bolt to 7 ft lbs Check the ignition timing If it is not correct rotate the pick up coil base plate until the timing marks align at the specified rpm as outlined in chapter 3 After fitting the pick up coil cover install a new blind plug Do not force the plug in against determined resistance or the cover may be cracked CRANKCASE COVER COMPONENTS The following sections deal with the removal inspection and installation of those compo nents found beneath the left and right crank case covers These include the clutch alter nator starter drive shift mechanism kickstarter and engine sprocket These com ponents can be serviced with the engine in the frame CHAIN GUIDE 2 Note the following points X CHAIN GUIDE 1 a Crankcase covers are secured with alien screws When installing these screws coat the threads with a bit of lubri cant or antiseize paste to facilitate future removal Tighten the screws evenly b New cover gaskets where appli cable should always be used Remove any traces of old gasket or gasket sealing com pound from the cover and crankcase mat ing surface c During the disassembly procedure it Rotate the crankshaft as shown to Install the cam may be necessary to keep the engine from chain guides turning over while a component is re moved There are several ways to do this sible and fit that bolt torquing it to the same If the engine is in the frame place the value transmission in gear and apply the rear 9 Thoroughly lubricate the cam lobes brake If the engine has been removed and bearings with motor oil from the frame loop a length of old drive 10 Compress the cam chain tensioner chain around the engine sprocket and se spring and hold it in place with a pin inserted cure the end in a vise Engage the trans into the hole provided Install the tensioner mission and the engine will not turn over tightening the bolts to 6 9 ft lbs After prop erly tightening the bolts remove the pin 11 Fit the cam chain guides It is neces Clutch sary to rotate the crankshaft to do this as this REMOVAL will slacken one side or the other of the chain 1 Drain the oil to allow the guides to be slipped into place 2 Remove the right side exhaust system 12 If the rocker arms have been disas sembled lubricate the arms and shafts the rider s footpeg and the rear brake pedal 3 Unscrew and remove the right crank thorougly and install them in the head cover Note that the threaded end of the shafts must case cover bolts Remove the cover If it is stuck tap around the cover with a plastic face outwards Use new o rings 13 Use a liquid gasket on the head cover mallet until it is freed 4 Gradually and in a cross pattern un mating surface then install the cover Tighten the head bolts gradually and in a screw and remove the clutch pressure plate screws Remove the springs the pressure cross pattern Proper torque is 6 9 ft lbs for the 6 mm bolts and 15 17 ft lbs for the 8 mm bolts 14 Install and secure the rocker arm shaft plugs 15 Adjust the valve clearance 16 Carefully turn the engine over to en sure that the valve timing is correct If resis tance is felt when turning the crankshaft stop immediately and determine the cause Do not force the crankshaft or bent valves may result Clutch hub circlip and thrust washer 1277

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