Suzuki RM125H

44 MACHINĘ TUNING

JET NEEDLE

NEEDLE CLIP POSITION

The jet needle is linked to the throttle valve by means of the needle clip. Its lower part is tapered and it has five grooves cut in the upper part where the needle clip fits.

To adjust the air/fuel rnixture with the jet needle, change position of the needle clip which is set in the 4th groove. The lower groove the clip is moved to, the higher the jet needle rises and the larger the clearance with the needle jet becomes, resulting in a richer air/fuel mixture ratio.

The needle clip position can be changed by half to fine-tune the setting as following manner.

•    Replace the cable holder with the included holder

and included red washer.    \

The two holders are different in color. Thestęn-dard holder is gray. The included holder is yet-low. The included holder and red washer niust be\" installed as a set.    /z"^-' ;i. \

•    Change the red washer loćatiom from over the needle clip to under the needle clip/Th is change will move the needle position by half to the richer side. The original position of red washer is over the needle clip.

By replacing the jet needle with the optional one_? it is possible to perform the same setting as describ-ing above. Change the jet needle from 6CHY17 type to 6CHY16 type. This change will move the needle position by half to the richer side. 6CHY16 type jet needles are availabie as optional parts.

For example, “6CHY17-62-4th” with the red washer installed under the needle clip is the same setting as “6CHY16-62-4th”.

NEEDLE NUMBER 6CHY17-62-4th

O.D. 2.62 mm

Changing the needle itself Controls air/fuel mixture ratio particulary on lovyer mid-throttle opening. (Size 62 indicates thaf O-D,. is 2 62 mm) The smaller the O.D., the richer the air/fuej mixture becomes.

EX.

\ \

\

.

• Needle Number \ *. <	O.D.
\ \6CHY17-64	2.64 mm
\> 6CHY16-64
6CHY17-63	2.63 mm
6CHY16-63
6CHY17-62	2.62 mm
6CHY16-62
6CHY17-61	2.61 mm
6CHY16-61
6CHY17-60	2.60 mm
6CHY16-60

MAIN JET

	Needle type and clip position
Lean i	6CHY17-62-2nd
	6CHY16-62-2nd
	6CHY17-62-3rd
	6CHY16-62-3rd
Rich	6CHY17-62-4th

The main jet, like the slow jet, meters fuel flow. Each jet size is indicated by a number. Larger num-ber means a larger borę diameter and fitting a larger number main jet enriches the air/fuel mixture.