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F U EL S YSTEM CARBURETTER OVERHAUL S.U. HIF 44 - Right hand DISMANTLE Remove the carburetters from the engine and clean t h e exteriors with a suitable solvent. 2. Remove the two nuts and spring washcrs and withdraw t h e air intake adaptor and joint washer. 3. Unscrew and remove piston damper assembly and drain the oil. 4. Remove the three screws and lift-off t h e suction chamber complctc with piston and spring. 5 . Remove spring clip from the top of the piston rod and withdraw the piston and spring. 6. Unscrew the fuel metering needle guide locking screw. If t h e needle cannot be removed from the piston as possible, in a soft jawed and with a sharp pull withdraw the needle, guide and spring . 7. Remove the four screws and withdraw the float chamber cover plate and sealing ring. Remove the jet adjusting lever screw and spring. bi-metal lever and seperate the lever from t h e jet. Unscrew and remove the float pivot spindle and plain washer, and remove the float. 11. Lift-out the valve. 12. Unscrew and remove the needle valve and filter. Unscrew and the jet bearing nut. Invert carburetter body to allow the jet bearing to fall out. If the bearing sticks, carefully tap it out from bridge side. . 15. Remove the piston guide Remove the suction chamber-to-body sealing ring. 17. Unscrew and remove the mixture adjusting screw and seal. Use thin nosed pliers to finally withdraw screw. 18. Bend-back the cam lever nut lock tabs and remove the nut and lock washer. 19. Removc the cam lever and spring. 20. Remove the end seal cover and seal. valve body and seal together with the valve spindle. collect the paper joint washer. 22. Note the position of the throttle levers and return spring. 23. Bend-back the lock washer tabs and remove the throttle nut. 24. Removc the lock washer, bush washer and throttle actuating lever. 25. the throttle return spring and remove the throttle adjusting from the throttle butterfly spindle and remove the return spring. 26. Hold the butterfly closed and mark the relationship of t h e butterfly to the carburetter flange. 27. Remove the butterfly two retaining screws and withdraw the from the spindle. . 28. Withdraw the throttle butterfly spindle from the carburetter body together with two seals. 29. Clean all components with petrol or de-natured alcohol ready for inspection. Do not use abrasives for the removal of stains or deposits. INSPECTION 30. Examine the throttle spindle and bearings for excessive axial 31. Check the float needle and seating for wear and the float for punctures and renew if necessary. 32. Check the condition of all rings and joint washers and renew if necessary. The float seal must be renewed. 33. Examine the carburettcr body for cracks and damage. spin the piston. The piston should spin freely i n the 35. the metering needle wear, scores and distortion. Check also that i t has the correct - see Engine Data, Section 05. 36. Examine the bi-metal jet for cracks. 37. Check all springs for cracks and distortion. ASSEMBLE Fit throttle butterfly 38. Fit the throttle spindle to the carburetter body and the throttle disc into the spindlc in its original position. Secure t h e disc with new screws and the screws to turning. 39. Fit new seals to both ends of throttle spindle that they are fitted the way round. Fit cold start assembly Fit a new ring to the valve body and assemble valve spindle to the valve body. 43 40 41. Fit a paper joint washer to the valve noting that the half-moon cut-out in the washer is tinued 3 |