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CLYMER VF500C 500F (1984-1985)
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Honda CLYMER VF500C 500F (1984-1985) [61/350] Chapter three

Honda CLYMER VF500C 500F (1984-1985) [61/350] Chapter three

52

CHAPTER

THREE

carburetors

must be

synchronized

to it.

The carburetors

are numbered

in

the

same

manner as

the cylinders

as shown

in

Figure 84.

6. Start

the

engine and

let it idle at

1,300

rpm

+

100 rpm.

7. lf the difference

in

gauge

readings

is

60

mm

Hg

(2.4

in. Hg) or

less among all

4

cylinders,

the

carburetors

are

considered

synchronized.

If not,

proceed

as

follows.

NOTE

Figure 86 is

shown

with

the carburetor

assembly

removed

for

clarity.

Do not

remove

the carburetor

assembly

to

perform

this

procedure.

8.

Using the

special

tool described

in the

introduction

to the

procedure,

turn the

adjusting

screw

on the

No. 3 carburetor

(A,

Figure 86).

Turn

the adjusting

screw

until the

reading

is the same

as

that on

the

No.

4

carburetor.

Open

the

throttle

a

little and close

it

back

down after

each

adjustment.

CAUTION

If

your

carb-sync

tool is not equipped

with

restrictors, open and

close

the

throttle

very

gently

to avoid sucking

mercury into

the

engine.

If

this

happens,

it

will not harm the

engine but

will

render

the

tool useless.

9.

Repeat Step 8

for

the

No. I

(8,

Figure 86) and

No.

2

(C,

Figure 86) carburetors.

Repeat Step

8

until

all carburetors

have the same

gauge

readings

as the

No.

4

carburetor.

NOTE

To

gain

the

utmost in

performance

and

fficiency

from

the engine,

adjust

the

carburetors

so

that the

gauge

readings

are

as close

to each other

as

possible.

10.

Shut

off

the engine

and

remove the

vacuum

lines.

Install the

screws and

washers

into

the

vacuum

ports

in the cylinder

heads

(Figure

85).

Make sure they

are

in tight

to

prevent

a

vacuum

leak.

I

l. Install the

side covers.

12. Restart the

engine and

readjust the

idle

speed

if necessary

as

described

in this chapter.

Interceptor

models

1.

Start

the

engine

and

let it warm up

to

normal

operating

temperature.

Ten

minutes of

stop-and-go

riding

is usually sufficient.

Shut

off the

engine.

2. Place the

bike

on the centerstand.

3.

Remove both

side

covers.

4. Remove the

vacuum

plug (consisting

of

a

screw

and

flat washer)

from the

No. 2,

No. 3 and

No.

4

cylinder

heads

(Figure

85).

5. Connect

the

vacuum

lines

from

the

carb'sync

tool,

following the

manufacturer's

instructions, to

these 3 cylinders

only.

Be sure

to

route the

vacuum

lines to the correct

cylinder.

Most carb-sync

tools

have

the cylinder

number

indicated

on

them

next

to

each tube

containing

mercury.

6.

Restart the

engine

and

let it

idle.

7. Pinch the

vacuum

line

going

to the

fuel shutoff

valve from

the

No.

I

cylinder.

This

line must be

pinched

off completely

so

the

vacuum

will not be

lost.

If

the

vacuum

is lost the

fuel

shutoffvalve

will

close,

shutting

off the

fuel supply,

and

the

engine

will

stop

running.

8.

Disconnect

the

vacuum

line from the

No. I

cylinder.

9. Connect

the

last

vacuum

line

from the

carb-sync

tool

to the

No.

I

cylinder.

Connect

the

vacuum

line directly

to

the special

fitting on the

cylinder

head or

remove

the

fitting and

connect

the

vacuum

line

as

specified

by

the

manufacturer.

NOTE

The

No.

4 carburetor

has no

synchronization

screw;

the

other

3

carburetors

must

be synchronized

to

it.

The carburetors

are

numbered

in

the

same

manner

as the

cylinders

as shown

in

Figare

84.

10. Start the

engine

and

let it

idle

at

1,300 rpm

+

100

rpm.

11. If

the

difference

in

gauge

readings

is

60

mm

Hg

(2.4

in.

Hg) or

less among

all

4

cylinders,

the

carburetors

are

considered

synchronized.

If not,

proceed

as

follows.

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