Page 14 - Mikuni Carburetor Catalog 21

TMX Series Carbs
TMX
TMX35/38mm CARBURETORS FOR DIRT BIKES and ATVs
The TMX features a flat slide design in a smooth bore venturi to provide improved throttle response and wider powerband. The float system with independently moving floats, working with a main jet enclosed in a baffle chamber, allows the TMX to perform smoothly without hesitation on the roughest terrain. TMX Series Carburetors are available in 35mm bore sizes for 125cc race engines, and in 38mm bore sizes for use on 250cc race engines.
STANDARD SETTINGS
CARB NO.
TM35-1
*(Kit No. TMX35-1-k)
TM38-18 370 *(Kit No. TMX38-18-k)
TM38-27 370 *(Kit No.TMX38-27-k)
MAIN JET 4/042
PILOT JET VM22/210
20 20 20
JET THROTTLE NEEDLE VALVE
6EN11-53 999-832-014-6.0 6EJ12-55 999-832-014-3.5 6EJ12-55 999-832-014-3.5
350
TMX/TMS SERIES
CARBURETOR DIMENSIONS (mm)
*NOTE: COMPLETE KIT INCLUDES AIR BOOT ADAPTER, INNER THROTTLE CABLE WIRE, CABLE END, MAIN JETS, PILOT JETS, JET NEEDLE, CLAMPS, HOSE AND INSTRUCTIONS.
Mikuni TMX Series Carburetors are intended for off-road riding and racing use only. Not legal for sale or use in California or other locations where similar pollution laws may apply.
IMPORTANT TUNING CHARACTERISTICS
JET NEEDLE
The Jet Needle is the tapered rod that is positioned in the throt- tle valve by the 'E'-Clip. The taper of the needle increases the clear- ance between the Jet Needle and the fixed Needle Jet outlet as the throttle is opened. As the air flow volume increases past the throttle slide, the fuel volume is also increased to maintain the correct air/fuel ratio.
NEEDLE 'E'-CLIP POSITION
'E'-Clip Position
1 Leaner 2
34
5 Richer O.D.
Straight Portion
First Taper
Second Taper Third TaperSS
JET NEEDLES
To correct the fuel mixture at 1/8th to 1/4th throttle slide position it may be necessary to change the Jet Needle. The Jet Needle will have a series of numbers stamped on it.
Example: 6EJ12-55. The numbers 55 indicate that the outside diameter (O.D.) of the Jet Needle is 2.55mm. A smaller O.D. number gives a richer mixture. A larger O.D. number gives a leaner mixture.Typical Jet Needles available:
ADC
B
MODEL DIMENSION
TOTAL WIDTH
A
B
C
D
TMX/006 Air Boot Adapter for TMS
Air Filter Boot
30mm
TMX/001
Air Boot Adapter for TMX
TMX/TMS CARB-AIR BOOT ADAPTER
An option available for TMX Carburetors, is this Air Boot Adapter, required for some applications when replacing a stock OEM carb with the TMX Carb.
The position of the 'E'-Clip in the Jet Needle is used to correct or change the air/fuel ratio between 1/4th and 3/4th throttle valve position. The 'E'-Clip can be raised or lowered on the Jet Needle.To richen the fuel mixture the 'E'-Clip is lowered on the Jet Needle, raising the Jet Needle. To lean the fuel mixture the 'E'-Clip is raised on the Jet Needle.
TMX35
6EN11-58 6EN11-57 6EN11-56 6EN11-55 6EN11-54 6EN11-53 6EN11-51
Leaner
Richer
TMX38
6EJ12-60 Leaner 6EJ12-59 6EJ12-58 6EJ12-57 6EJ12-56 6EJ12-55 6EJ12-54 6EJ12-53 Richer
TMX35 TMX38-27 TMX38-18 -1
40 44 47
76
164
62
76
14