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I.

PREFACE

The Maico models MC 250, 400, 450 and 501 CCM are constructed

and designed especially

for compe-

tition

and off-road

use. They are suitable for moto-cross

and enduro competition,

and for crossing any

difficult

terrain.

The moto-cross

models are known

for their high horse-power

output,

special frame

geometry

and exceptional

light weight.

Fore these three qualities

to be used fully,

the machine

must

always be tuned and serviced to the highest degree. These instructions,

together

with

basic mechanical

knowledge

will

assure trouble

free performance.

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••

501 CCM

1

91,6

mm

76

mm

501 ccm

12 : 1

51/6900

RPM

Bing Type V 54

38mm

185

285

40

As Required

440 CCM

400 CCM

250 CCM

Air cooled, Piston Port, 2 Stroke

Engine

1

1

1

67 mm

77 mm

82 mm

70 mm

83 mm

83 mm

247 ccm

386 ccm

438 ccm

12:1

12:1

12:1

33/7000

RPM

43/6700

RPM

47/6900

RPM

Bing Type V54

Bing Type V 54

Bing Type V 54

36 mm

36 mm

36 mm

175-180

185

185

280-285

285

285

35

40

40

As Required

As Required

As Required

1 1/2 Turns As Required

Internal

Rotor

Magneto Type Appt.

MZ 465 With Internal

Primary

and External

Secondary

Ignition

Coiis

II. TECHNICAL DATA

Maico MC

Motor:
No. of Cylinders:
Bore:

Stroke:

Displacement

(CCl

Compression

Ratio:

Brake Horse-Power

(Din)

Carburetor:

Diameter:

Main Jet:
Needle Jet:

Low Speed:

Needle Position:

Idler Air Screw:

Ignition:

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-

.•.

Содержание MC 250

Страница 1: ......

Страница 2: ...AfAICO MC250 MC400 MC440 MC501 Instruction book Service manual From January 1974...

Страница 3: ...w Clutch Disassembled 8 g Transmission with Bearings Disassembled 9 10 Carburetor Air Cleaner Boot Air Cleaner Assy 9 11 Frame Bare 10 12 Telescopie Forks Photograph Exploded Drawing 10 13 Front Wheel...

Страница 4: ...nce 501 CCM 1 91 6 mm 76 mm 501 ccm 12 1 51 6900 RPM Bing Type V 54 38mm 185 285 40 As Required 440 CCM 400 CCM 250 CCM Air cooled Piston Port 2 Stroke Engine 1 1 1 67 mm 77 mm 82 mm 70 mm 83 mm 83 mm...

Страница 5: ...ake Trial Ground Clearance Front Suspension Rear Suspension WHEELS Front Rear TIRES Front Rear Tire Pressure Front Brake Rear Brake Fuel Tank Petcocks Air Filter MC 199 152 123 10 1 Liter gear oil 1 q...

Страница 6: ...35 53 15 D 20...

Страница 7: ...o 83 00 400 CC 7695 77 10 77 25 t078 00 250 CC 66 95 67 10 67 25 to 68 00 The MAHLE piston is forged of a special piston alloy containing a large amount of silicon With L shaped piston ring in the 250...

Страница 8: ...which is built in three different models The MC 250 has a clutch which is used in conjunction with the double row prima ry chain It has six toothed outer clutch plates which are 99 mm in diameter and...

Страница 9: ...of the highest qual ity steel 9 Transmission with Bearings Disassembled 10 CARBURETOR AIR CLEANER The carburetor is a concentric type V 54 36 iZ or 38 iZ mm On the 501 wh ich is attached to the cylin...

Страница 10: ...or Koni springs and shocks are available The shocks dampening characteristics are especially developed for Maico 4 SEAT The seat is a one man seat specially fitted and developed after years of moto cr...

Страница 11: ...kes M 4 x 243 mm 18 spokes M 4 x 230 mm On the small end of the hub is a reinforcing ring made of aluminium alloy for strength 13 Frant Wheel 10 REAR WHEEL This rim is also available in chromed steel...

Страница 12: ...hen the proper amount of advance is found and the igni tion points break the circuit at the previously mentioned settings then the screws holding the stator plate in position should be re tightened ev...

Страница 13: ...ion A softened head gasket should be installed and the cylinder head bolts tightened to 18 foot pounds 6 CRANK SHAFT While the cylinder is not on the crankcases the play in the lower connecting rod be...

Страница 14: ...ssary Also a warped or bent swing arm should be replaced Mounting of Koni shock absorbers 1 The retainin9 clips and springs on original shocks must be removed 2 The bottom spring retainer is put on it...

Страница 15: ...elease it from the adjustment mecha nism 6 The shock can then be re assembled in reverse order Be sure to re install the rubber bumper Failing to do so can seriously damage the shock under use Pay spe...

Страница 16: ...y tapping the pin lightly Use caution not to apply any pres sure to the side of the connecting rod 2 4 Lay engine on primary case side and remove timing cover 2 5 Remove stator by loosening and removi...

Страница 17: ...n gear shaft 2 11 Removal of transmission The shift fork shaft is pulled out then the main shaft with slider gears and eventually the lay shaft The spacer ring and three needle bearings are then lifte...

Страница 18: ...he main drive sprocket and the primary chain Be careful not to forget the washer between mainshaft bearing and the clutch housing and body Check to see if plates are warped or the teeth on the plates...

Страница 19: ...ir releasevalves are functioning properly and the top pinch bolts are tightened 2 7 Handlebars and front wheel are mounted 3 Swing Arm Rear suspension disassembly 3 1 The rear wheel is removed by remo...

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