BMW R71 Instruction Download Page 20

When it is pressed down, the horn operates and when it is released, the horn stops 
operating.

5.2.2.4

 Turn light switch-when it is turned to left, left turn light comes on and to 

rights, right turn light comes on.

5.2.3

 Electric starting pushbutton -press down this button is to conduct electric 

starting. Attention should be paid not to making continous starting for over 3 seconds, 
otherwise the battery may be damaged.

5.3 Battery Servicing

T

he battery used on CJ-750 engine powered motorcycle is lead acid battery 3-M-14, 

whose voltage is 6V. The one used on CJ-750D engine powered motorcycle is dry 
storage battery 6-MA-28 whose voltage is 12 V.

5.3.1

 Make up electrolyte with relative density of 1.28+/-0.01g/cm3 ( measured at 15 ) 

by mixing distilled water or purified water with pure battery sulphuric acid.

5.3.2

 Clean battery surface, take off electrolyte filling cap, make air vent unblocked 

and pure the ready-made electrolyte into the battery to a level of 5-10mm above the 
plate.

5.3.3

 The dry storage battery 6-MA-28, after being charged with electrolyte, should 

be put at a standstill for 20 min. before operation. The exterior of the battery should 
be cleaned with water and electrolyte filling cap tightened before operation.

5.3.4

 The lead acid battery 3-M-14 should be precharged for 3-5 hours after filling 

electrolyte. The current for the first phase of precharging is 0.8A. The current can be 
changed to 0.4 A when voltage of each cell reaches to 2.4V. The charging can be 
stopped when charging voltag and electrolyte relative density keep unchanged for 3 
hours.

5.3.5

 In charging the positive pole of the battery should be connected to positive pole 

of DC power source and the battery negative pole to negative pole of DC source. At the
same time, electrolyte filling cap should be removed to let gas escape. The charging 
should not be done near tinder to avoid causing explosion. If temperature of 
electrolyte exceeds 45, the battery should be cooled and then charged again.

5.3.6

 If it is found that the electrolyte level is lower than plate in charging or using of 

battery, distilled water or purified water should be added.

5.3.7

 On completion of charging, tighten the electrolyte filling cap and clean exterior 

of the battery with water. 

Summary of Contents for R71

Page 1: ...AL AND PERFORMANCE DATA 2 RUNNING IN OF MOTORCYCLE 3 OPERATION OF MOTORCYCLE 4 MOTORCYCLE COMPONENTS CHECKING AND ADJUSTING 5 MOTORCYCLE ELECTRIC SYSTEM 6 MOTORCYCLE LUBRICATING 7 LONG TERM STORAGE OF...

Page 2: ...1 MAIN STRUCTURAL AND PERFORMANCE DATA 1 1 Components 1 2 Main Dimensional Data...

Page 3: ...1 3 Main Weight Data 1 4 Main Performance Data 1 5 Modes and Technical Data of Main Parts...

Page 4: ...avoid engine temperature rising Keep on checking temperature of the engine gear box rear drive and brake drum In the meantime check all parts and components for fixation adjust gap and tighten loosen...

Page 5: ...he oil drain threaded plugs for being tightened 3 1 3 After gasoline and oil filling check handle bar brake and clutch for reliability and flexibility Check pressure of tyres fixation of wheels connec...

Page 6: ...set I hen it should be reset The engine can be started only when the neutral gear position is properly set 3 2 3 Press down the button attached on the float chamber cover until the gasoline spills ou...

Page 7: ...l shorten the life of battery and starting mechanism 3 2 9 After the engine is started slowly open the air valve according to the engine operating condition 3 2 10 According to the operation sound of...

Page 8: ...or is to be used due to engine flameout caused by improper operation to the motorcycle hold the clutch lever to disengage the clutch then start the engine with motor It is not necessary to neutral pos...

Page 9: ...on and poor acceleration So the valve opening must be properly adjusted 4 2 1 Open the valve chamber cover Item 4 in Fig 7 4 2 2 Apply kickstarter to operate engine crankshaft so as to make the cylind...

Page 10: ...el for 360 when the O scale line of flywheel appears again in the center of observation hole check and adjust the right cylinder mixture valve opening with the above method 4 3 Distributor Platinum Co...

Page 11: ...left of front crankcase Its adjusting methods are as follows see Fig 9 4 3 2 1 Remove distributor cover 4 3 2 2 Rotate ignition camshaft by applying kickstarter to push the movable arm of platinum co...

Page 12: ...to make piston reach the point 0 5 1mm to its upper limit in cylinder Rotate the distributor till the indicating light just comes on Then tighten the securing bolt reoperate the crankshaft to make th...

Page 13: ...oosen securing bolt Item1 in Fig 9 turn on ignition switch rotate distributor till the indicating light just comes on at this moment the platinum contacts are just setting apart to the extent of a pap...

Page 14: ...ling 4 5 1 1 Start the engine carry out the following steps after the engine warms up to normal temperature 4 5 1 2 Turn outwards throtte twist grip fully home 4 5 1 3 Screw in the idling adjusting sc...

Page 15: ...r about a quarter stoke Alternately remove high tension cable from cylinders and listen to the operation sound of the other cylinder Remove rubber cover from carburett er upper cover of lower speed cy...

Page 16: ...ear to proper position If trip stop still exists after using hand gear shift lever joint sleeve driving fork and sector plate should be repaired or replaced If trip stop disappears after using hand ge...

Page 17: ...tion Adjusting The side car is connected to main body with two ball couplings and to upper frame with two rods In order to have a smooth and steady travel a 2inclination and a 10 12mm toe in are provi...

Page 18: ...ELECTRIC SYSTEM 5 1 Ciruitry 5 1 1 Generator complemented with engin CJ 750 is a positively grounded DC generator MZF 12 whose rated power is 65w rated voltage is 6v The motorcycle circuitry is given...

Page 19: ...cal parts as ignition switch horn pushbutton turn switch brake signal switch and starting pushbutton For night operation insert a key into the ignition switch and turn it clockwise to cut in switch pi...

Page 20: ...er being charged with electrolyte should be put at a standstill for 20 min before operation The exterior of the battery should be cleaned with water and electrolyte filling cap tightened before operat...

Page 21: ...it is corrode easily the battery wires after being secured should be coated with vaseline or grease 5 3 10 The dry storage battery can keep its dry charg within half a year It should be recharged for...

Page 22: ...ble Standard lubes for the motorcycle are Oil HQ 6 HQ 10 HQ 15 and GB485 72 Calcium grease ZG 1 ZG 2 ZG 3 ZG 4 ZG 5 andGB491 65 Sodium base grease ZN 2 ZN 3 ZN 4 and GB492 65 The shock absorber oil wh...

Page 23: ......

Page 24: ...e carburetter rotate throttle twist grip to move throttle valve up and down for 3 4 times 7 3 Remove air filter coat air valve with engine oil open and close the valve 3 4 times and refit the air filt...

Page 25: ...8 MOTORCYCLE PERIODIC MAINTENANCE The motorcycle should be periodically maintained as described in the following table...

Page 26: ...9 MOTORCYCLE TROBLESHOOTING Trobleshoot the motorcycle according to the following charts NOTE Smoking is prohibitted and fire is not allowed nearby in checking fuel system...

Page 27: ...140 MOTORCYCLE ELECTRICAL DIAGRAM...

Reviews: