Suzuki RM-Z250 - ECM Tuning Map Selection

4-6 MACHINE TUNING
Jet needle clip position
To adjust the air/fuel mixture 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 main nozzle becomes, resulting
in a richer air/fuel mixture ratio.
Needle number
Changing the needle itself controls air/fuel mixture ratio particu-
larly on lower mid-throttle opening. The smaller the O.D., the
richer the air/fuel mixture becomes.
* Included alternated parts
Air/fuel mixture Needle type and clip position
Lean NLDT-1st
NLCT-1st
NLDT-2nd
NLCT-2nd
NLDT-3rd
NLCT-3rd
NLDT-4th
NLCT-4th
NLDT-5th
NLCT-5th
NLDT-6th
NLCT-6th
NLDT-7th
Rich NLCT-7th
Air/fuel mixture Needle Number Part No. O.D.
Lean NLDV 13383-10H90
2.795
NLCV 13383-10H80
NLDU 13383-10H70
2.785
NLCU 13383-10H60
* NLDT 13383-10H50
2.775
NLCT 13383-10H40
NLDS 13383-10H30
2.765
NLCS 13383-10H20
NLDR 13383-10H10
2.755
Rich NLCR 13383-10H00
Lean
Rich
1
2
3
4
5
6
7
NLCT
O.D.