Honda TRANSALP XL600-650V (1987-2002) [41/291] I o every 8000 miles 12 000 km

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i 2o Every 8000 miles 12 000 km 16 8 Turn the engine until the line next to the RT mark aligns with the notch not forgetting that on most models there is a difference between the inlet valve clearance and the exhaust valve clearance On completion turn the engine anti clockwise two full turns 720 then align the marks so it is at TDC on the compression stroke as before and recheck the clearances 8 Moving to the rear cylinder rotate the engine anti clockwise using a suitable socket on the alternator rotor bolt until the line next to the RT mark on the flywheel aligns with the notch in the timing mark inspection hole see illustration At this point make sure that the cylinder is at TDC top dead centre on the compression stroke and not the exhaust stroke by checking for some free movement between each rocker arm and the valve There must be freeplay evident in all three rocker arms If not turn the engine anti clockwise through one full turn 360 until the RT mark again aligns with the notch There should now be freeplay in all rocker arms indicating that the engine is correctly positioned Check and adjust the valve clearance as described in Step 7 9 Install all disturbed components in a reverse of the removal sequence referring to the relevant Chapters where necessary Install the valve inspection caps and covers using new O rings if necessary and smear the O rings with clean oil see illustration Install the crankshaft and timing inspection caps using new O rings if necessary and smear the O rings with clean oil see illustration Apply a smear of molybdenum disulphide grease to the threads of the caps and tighten them securely 17 5a Detach the fuel tap vacuum hose from the rear cylinder take off point 16 9a If necessary use new O rings on the valve caps and covers 16 9b and the inspection and end caps you will need a set of vacuum gauges or calibrated tubes to indicate engine vacuum The equipment used should be suitable for a synchronisation twin cylinder engine and come complete with the necessary adapters and hoses to fit the Warning Petrol gasoline is take off points Note Because of the nature extremely flammable so take of the synchronisation procedure and the extra precautions when you work need for special instruments most owners on any part of the fuel system Don t leave the task to a Honda dealer 3 Start the engine and let it run until it reaches smoke or allow open flames or bare light normal operating temperature then check bulbs near the work area and don t work in that the idle speed is correctly set and adjust a garage where a natural gas type it if necessary see Section 2 appliance is present If you spill any fuel on Warning The engine and your skin rinse it off immediately with soap carburettors will be hot With the and water When you perform any kind of restricted access to the screws work on the fuel system wear safety glasses and have a fire extinguisher great care must be taken not to bum youtself while synchronising the carburettors suitable for a Class B type fire flammable 4 Remove the fuel tank see Chapter 4 liquids on hand 5 On XL600V models release the clamp and Warning Take great care not to detach the fuel tap vacuum hose from the burn your hand on the hot engine unit when accessing the gauge take off point on the rear cylinder intake duct take off points on the intake manifolds Do see illustration Undo the blanking screw not allow exhaust gases to build up in the from the front cylinder intake duct and thread work area either perform the check outside a suitable hose adapter in its place see illustrations or use an exhaust gas extraction system 6 On XL650V models release the clamp and 1 Carburettor synchronisation is simply the detach the fuel tap vacuum hose from the process of adjusting the carburettors so they take off point on the rear cylinder intake duct pass the same amount of fuel air mixture to see illustration 17 5a Release the clamp each cylinder This is done by measuring the and detach the PAIR solenoid valve vacuum hose from the take off point on the front vacuum produced in each intake duct cylinder intake duct see illustration Carburettors that are out of synchronisation will result in decreased fuel mileage 7 On XRV750 models undo the blanking increased engine temperature less than ideal screw from each cylinder intake duct and throttle response and higher vibration levels thread suitable hose adapters in their places see illustrations 17 5b and c 2 To properly synchronise the carburettors 17 Carburettors A A 17 5b Undo the blanking screw arrowed 17 5c and thread a suitable adapter in its place