background image

Next, the air release valves, located in the top oil filler

caps, should be checked by compressing

forks and

observing air pressure release. The fork should return

to its original

position.

If this is not the case, one

must countersink

the seating of the ball (for the air release valve) lightly,

(app. 150°- 160°). The surface

should have no grooves. Otherwise

the ball should be tapped into the seat lightly.

During

re-assembly of

the forks, care must be taken that there is no pressure on the fork tubes or sliders after re-tightening

the

fork pinch bolts and the front

axle.

18. Changing Fork oil (Draining)

19. Filling

Fork oil

-

9.

REAR WHEEL SUSPENSION

The rear wheel suspension

is produced

by a swinging arm which

is attached

to the frame with

rubber

bushings and either Girling or Koni shocks. A properly

functioning

rear suspension gives maximum

perfor-

mance in difficult

terrain.

It is important

to have both shock absorbers adjusted

to produce

the same dam-

pening. The bushings of the swing arms should be checked for play. (Worn bushings MUST be replaced).

A I ight yellow

or brown color on the dampening

rods of the shocks is proof of too much load on the

shock absorbers. The swingarm

bushings should be replaced if necessary. 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 its lowest setting

(Three different

adjustments

are possible.)

3. The shock rod is extended

completely

and the original

spring is slipped over the shock body oil reser-

voir.

4. The spring is compressed and the retaining

clips are slipped into position.

5. The top and bottom

shock eyes are al igned by rotation

of the top eye

Dampening Adjustment of Koni Shocks

In all Koni ("0"

series) shocks the dampening

is adjustable.

When they are obtained

from

the Koni fac-

tory

they are set on the lowest adjustment,

and can be mounted

immediately.

I f stronger

dampening

is desired, the shocks dampening

can be adjusted.

The spring preload can also be adjusted

to a stronger

setting.

The adjustment

of the shock from extremely

soft to extremely

hard is in 6 different

steps, as

follows:

1. Remove the complete

shock and remove the spring and clips.

2. Extend

the shock rod completely

and push the rubber bumper

to the bottom.

If the bumper

sticks,

pry it loose with a screwdriver.

The retainer

nut (19 mm) is then loosened by securing the top shock

eye with

a screwdriver

or in a vice. The eye, retainer

nut, and rubber bumper

are then removed.

Also

remove the alurnlnum

spacer and do not rB-lnstall it. This will

result in 1/.3

me",?

shock travel.

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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