Honda AFRICA TWIN XRV750 (1987-2002) [74/291] Engine clutch and transmission 2 25
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Honda AFRICA TWIN XRV750 (1987-2002) [74/291] Engine clutch and transmission 2 25

Honda AFRICA TWIN XRV750 (1987-2002) [74/291] Engine clutch and transmission 2 25

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Engine clutch and transmission 2 25 9 21a Measure the diameter of the shaft 9 21b and the internal diameter of the bore 9 22a Locate the arms and fit the wave washers Specifications If the oil clearance is greater than specified measure the diameter of the camshaft bearing journal with a micrometer If il is within specifications replace the cylinder head and cam holders with new components If the journal diameter is less than the specified limit replace the camshaft with a new one and recheck the clearance If the clearance is still too great also replace the cylinder head and cam holders Before replacing any worn parts with new ones bear in mind the information in the Note preceding Step 9 17 Except in cases of oil starvation a cam chain wears very little If a chain has stretched excessively which makes it difficult to maintain proper tension it must be replaced with a new one see Section 10 18 Check the sprocket for cracks and other damage replacing it with a new one if necessary Note that If a new sprocket is installed a new cam chain must also be installed If the sprockets are worn the cam chain is also worn and also the sprocket on the crankshaft which can only be remedied by renewing the crankshaft If wear this severe Is apparent the entire engine should be disassembled for inspection 19 If available blow through the oil passages in the rocker arms and camshaft holder with compressed air Inspect the rocker arm contact points for pitting spalling score marks cracks and rough spots If the rocker arms are damaged they must be replaced along with the shafts as a set 20 Check the condition of the wave washers and replace them if they are damaged or deteriorated 21 Measure the diameter of the rocker arm shafts in the area of contact with the rocker arms see illustration Also measure the internal diameter of the rocker arm bores see illustration Compare the measurements to the specifications listed at the beginning of the Chapter If any components are worn beyond their limits replace all the shafts and arms as a set 22 If removed apply a smear of molybdenum disulphide grease to the contact faces of each rocker arm then install the arms and their wave washers into the camshaft holder making sure they are returned to their original positions see illustration The wave washers fit on the inside of the intake rocker arms and on the left hand side of the front cylinder exhaust rocker arm and the right hand side of the rear cylinder exhaust arm adjacent to the triangular mark on the holder see illustration 23 Apply a smear of molybdenum disulphide grease to the rocker arm shafts then slide the shafts into the camshaft holder making sure they are Installed In their original positions and that they pass through the rocker arms and wave washers see illustration Position the shafts so that the grooves in the ends of the shafts are vertical and the holes in the shafts align with the boll holes in the camshaft holder see illustration Check that the arms move freely on the shafts 24 If only the front camshaft has been removed position the crankshaft at TDC on the compression stroke for the rear cylinder see Step 2 then rotate the crankshaft anticlockwise 488 at which point the FT mark on the rotor will align with the notch in the inspection hole This positions the front cylinder at TDC and the front camshaft can be installed If only the rear camshaft has been removed position the crankshaft at TDC on the compression stroke for the front cylinder see Step 2 then rotate the crankshaft anti clockwise 232 at which point the RT mark on the rotor will align with the notch in the inspection hole This positions the rear cylinder at TDC and the rear camshaft can be installed If both camshafts have been removed Install the front one first with the crankshaft positioned so that the FT mark on the rotor aligns with the notch in the inspection hole then rotate the crankshaft anti clockwise 232 at which point the RT mark on the rotor will align with the notch In the inspection hole This positions the rear cylinder at TDC on the compression stroke and the rear camshaft can be installed Caution Keep the cam chains taut when rotating the crankshaft 25 Check that the cam chain Is engaged around the lower sprocket teeth on the crankshaft and that the crankshaft is positioned as described in Step 24 Apply a smear of molybdenum disulphide grease to the camshaft journals Position the camshaft sprocket with the sprocket s IN mark facing inwards the Index lines on the sprocket 9 22b making sure they are correctly positioned 9 23a Slide the shaft in aligning the arm as you do 9 23b and align the cutout in the shaft A with the bolt hole B Installation

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