User manual APRILIA MX125

[. . . ] The catalytic version of the MX125 is fitted with a silencer with metal catalytic converter of the "platinum-rhodium bivalent" type. This device provides for the oxidation of the CO (carbon monoxide) and of the HC (unburned hydrocarbons) contained in the exhaust gases, changing them into carbon dioxide and steam, respectively. Due to the catalytic reaction, the high temperature reached by the exhaust gases results in the burning of the oil particles, thus keeping the silencer clean and eliminating the exhaust fumes. Avoid parking the catalytic vehicle near dry brush wood or in places easily accessible to children, as the catalytic silencer becomes extremely hot during use; be very careful and avoid any kind of contact before it has completely cooled down. [. . . ] The vehicle has a separate lubrication system which includes an mixer oil tank (Fig. 13) (1, 3 l with a reserve of 0, 5 l ) and a variable-capacity oil supply pump (the capacity varies according to the number of revs of the motor and the opening of the throttle). When the oil reaches reserve level, this is indicated by the coming on of the mixer oil reserve warning light "". The capacity is predetermined in the design phase, so there is no need for the user to make any adjustment. It is necessary to bleed air from the pump whenever it has to be dismantled, the mixer oil supply pipe is detached, or when the lubricant in the mixer oil tank is completely exhausted. Proceed as follows: Empty the fuel tank and fill it with 2 ÷ Unscrew the drainage screw (1) and at the same time completely rotate the pump control lever (2) until the oil drains off, then tighten the screw again. Keep the pump lever rotated until all traces of air bubbles have completely disappeared from the carburettor supply pipe. For greater safety we advise using up all the blended fuel in the tank before refilling with only premium grade petrol (see "TECHNICAL FEATURES"). Adjust the motor idling speed, then check that the end play of the oil pump and the carburettor cables is the same; if not, regulate the adjusters provided in order to obtain a clearance of 1 mm. Check that there are no twist in the petrol hose and oil hose. If there are twist then replace the hose. Check that the vertical movement in the lower part of the chain, at a point mid-way between the pinion and the crown, is about 30 mm. If this distance is not correct, proceed as follows: Loosen the rear wheel pin fastening nut. For the wheel centering: Make sure that on both sides the fixed reference on the rear fork corresponds to the number indicated on the chain tightener. From time to time check the wear condition of the chain; make sure that it is not too loose and that there are no angles or seized links. If any faults are found, change the chain. Never fit a new drive chain on a sprocket wheel/ crown gear with very worn teeth; vice versa do not use a worn chain on a new sprocket wheel/crown gear. Every 4000 km, or according to conditions of use, clean the filtering element as follows: Unscrew and remove the saddle locking nut positioned under the mudguard. Wash the filtering element with clean, not-inflammable solvents or solvents with high volatility point, then let it dry thoroughly. Apply a filter oil or a thick oil (SAE 80W-90) on the whole surface of the filtering element, then squeeze it to eliminate the oil in excess. The filter must be well impregnated, though not dripping Reassemble performing all the operations in reverse order, being careful to close the filter box cover correctly. Do not use the vehicle if the coolant is below the minimum allowed level. [. . . ] Before cleaning the vehicle, plug the exit of the exhaust pipe and ensure that the spark plug and the carburettor are properly in place. Before cleaning, degrease the most exposed parts (engine) with suitable additives. Then clean the vehicle with soapy water, using only natural water pressure to rinse it. do not use polishing pastes on matt paints. [. . . ]