Honda AFRICA TWIN XRV750 (1987-2002) [79/291] 30 engine clutch and transmission
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Honda AFRICA TWIN XRV750 (1987-2002) [79/291] 30 engine clutch and transmission

Honda AFRICA TWIN XRV750 (1987-2002) [79/291] 30 engine clutch and transmission

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2 30 Engine clutch and transmission 12 25 Tighten the nuts and bolts as described to the specified torque setting 26 Install all other components that have been removed in a reverse of the removal procedure referring to the relevant sections where necessary On XL600V H to K 1987 to 1989 models blow through the external oil pipe and its bolts using compressed air if available then install the pipe using new sealing washers and tighten its bolts to the specified torque setting 27 If removed install the engine as described in Section 5 13 Valves valve seats valve guides servicing 1 Because of the complex nature of this job and the special tools and equipment required most owners leave servicing of the valves valve seats and valve guides to a professional However you can make an initial assessment of whether the valves are seating correctly and therefore sealing by pouring a small amount of solvent into each of the valve ports If the solvent leaks past any valve into the combustion chamber area the valve is not seating correctly and sealing 2 You can also remove the valves from the cylinder head clean the components check them for wear to assess the extent of the work needed and unless a valve service is required grind in the valves see Section 14 The head can then be reassembled 3 A dealer service department will remove the valves and springs replace the valves and guides recut the valve seats check and replace the valve springs spring retainers and collets as necessary replace the valve stem seals with new ones and reassemble the valve components 4 After the valve service has been performed the head will be in like new condition When the head is returned be sure to clean it again very thoroughly before installation on the engine to remove any metal particles or abrasive grit that may still be present from the valve service operations Use compressed air if available to blow out all the holes and passages 14 Cylinder head and valves disassembly inspection and reassembly SV 1 As mentioned in the previous section valve overhaul should be left to a Honda dealer However disassembly cleaning and inspection of the valves and related components can be done if the necessary special tools are available by the home mechanic This way no expense is incurred if the inspection reveals that overhaul is not required at this time 2 To disassemble the valve components without the risk of damaging them a valve spring compressor is absolutely essential Make sure it is suitable for motorcycle work 14 3 Valve components 1 Collets 2 Spring retainer 3 Inner spring 4 Outer spring 5 Spring seat 6 Stem seal 7 Valve components in such a way that they can be returned to their original locations without getting mixed up see illustration A good way to do this is to obtain a container which is divided into six compartments and label each compartment with the location of a valve i e left intake valve right intake valve or exhaust valve If a container is not available use labelled plastic bags an egg carton also does very well 4 Clean all traces of old gasket material from the cylinder head If a scraper is used take care not to scratch or gouge the soft aluminium Disassembly 14 5a Make sure the compressor locates correctly on the valve 14 5b and the spring retainer 3 Before proceeding arrange to label and store the valves along with their related 14 5c Remove the collets as described 5 Compress the valve spring on the first valve with a spring compressor making sure it is correctly located onto each end of the valve assembly see illustrations On the underside of the head make sure the plate on the compressor only contacts the valve and not the soft aluminium of the head if the plate is too big for the valve use a spacer between them Do not compress the springs any more than is absolutely necessary Remove the collets using either needle nose pliers tweezers a magnet or a screwdriver with a dab of grease on it see illustration Carefully release the valve spring compressor and remove it Remove the spring retainer

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