Sudco Vol 38

Setting Part

To Make Richer

Recommended Increment

ForChange

Main Jet

use larger number

2 or 3 numbers

Main Air Jet

use smaller number

10 numbers on Primary

Slow Jet

Use larger number

2 or 3 numbers

Air Screw

turn clockwise

1/4 turn

Throttle Valve Cutaway

use smaller number

.5mm

Jet Needle

use skinner one

see Jet Needle section

FUNCTION OF JETTING COMPONENTS

CONTRIBUTION OF JETTING COMPONENTS

Each calibration part controls fuel low at a different throttle opening.

The diagram below will give you an idea which calibration part is the

key at various throttle openings.

NOTE:

Some gas tanks have one fuel line and another for vacuum. Eliminate the vacuum

line (usually thinner), connect the fuel line to the carb and ind a position on the petcock

(usually PRIME) where fuel lows at all times.

THROTTLE OPENING

Idle 1/8 1/4 1/2 3/4 Full

CONTRIBUTION TO FUEL FLOW

CR Special Racing Carburetors

535

Fuel Screw, Slow Jet

Jet Needle Diameter

Jet Needle Clip (step), size:L1

Main Jet,

Main Air Jet

Jet Needle Taper