Carburetor
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Typical JDJetting Kit with Custom Machined Needles

Carburetor Throttle Circuit Range Effects

Carburetor Tuning Range Chart

Keihin Needle Chart with Small Needle Tip Notation

Suzuki DRZ400S BSR Carburetor

FCR-MX Carburetor Parts

Eploded View 1

Eploded View 2

Carburetor Clamps and Fittings

FCR1 Single Carburetor Parts

Accelerator Pump Diaphragm Spacer in Jet Kit JDK015, JDK013, and JDK002

Needle Clip Positions for FCR carburetor needles

FCR-MX Float Level Setting

Float Level PWK Short Body

PWK Air Striker Float Level Setting- Yamaha & KTM, 2 screw cap

Air Striker Float Level Setting- Screw Cap Version

FCR1 Float Level Setting

Vacuum Plate Seal Orientation

Vacuum Plate Seal Orientation 4

Vacuum Plate Seal Orientation 2

Vacuum Plate Seal Orientation 5

1990 Keihin PWK Float Height and FUEL Level

FUEL Level

TPS Resistance Check #1

TPS Resistance Check #2

2011 YZ450F TPS Setting

Jets and Needle Clip Positions

Pilot screw (Fuel Screw)

Accelerator Pump

Accelerator Pump Linkages 1

Accelerator Pump Linkages 2

Carburetor Bottom with Pilot Screw, Spring, Washer, and O-ring

Carburetor Slide and Plate (Square End is Down on Plate)

Carburetor Cables, Hoses, and Clamps

Setting the Pump Timing Start point

FCR Single Taper Needles

PWK/PJ Single Taper Needles

Keihin PWK PJ Single Taper Needles

FCR Needles list.gif

Yamaha YZ426 Needle Info.jpg

Power Bowl with Adjustable Pump

FCR Carb disassembly for clearing pump nozzle

FCR Carb disassembly for clearing pump nozzle

FCR Carb disassembly for clearing pump nozzle

FCR Carb disassembly for clearing pump nozzle

FCR Carb disassembled

Two small passages flow fuel from the pilot jet, however, only the lower opening is metered by the fuel screw

IMG_3275.JPG

IMG_3267.JPG

IMG_3270.JPG

IMG_3278.JPG

Accel Pump Nozzle and Pilot Jet Passages.jpg

Keihin FCR Gaskets at Middle of Carburetor.jpg

FCR Mid-Body Gasket Set #JDKH17

Gaskets at Middle of Carburetor - JDJetting part JDKH33

Mid Body Gasket with Bubble Shape Included- JDKH33

Standard Nozzle with Single Passage

Dual Spray nozzle #JDKH27

FCR Carb Disassembly for Pump Nozzle Access and Dual Spray Installation

Dual Spray Nozzle Installed, #JDKH27

Standard Accelerator Pump Nozzle Compared to Dual Spray Nozzle from #JDKH27

Standard Accelerator Pump Nozzle

Dual Spray Accelerator Pump Nozzle from #JDKH27

Mid Body All Gaskets FCR-MX, Upper gaskets are in #JDKH17, JDKH33, and Dual Spray Nozzle #JDKH27

Mid Body Gasket JDKH17 Cut to Fit FCR Carb with Removeable Flange

JDKH17 vs JDKH33 -Use JDKH17 to Cut and Fit

JDKH17 vs JDKH33 -Use JDKH17 to Cut and Fit

3M Scotch Weld 847 KTM Recommended Product to Seal the Mid-Body Gasket

3M_Adhesive_847

Keihin FCR Mid-Body Gasket Set #JDKH17

FCR Mid-Body Gasket Set #JDKH17 (1 of the 2 large gaskets included is shown)

FCR Mid-Body Gasket Set #JDKH17 (1 of the 2 large gaskets included is shown)

Gasket and Rebuild Kit #JDKH20

Slide Plate #JDKH22 and Seal #JDKH19

FCR Mid-Body Gasket Set #JDKH17

Dual Spray Accelerator Pump Kit #JDKH27

NOTE- THESE ARE PICTURED UPSIDE-DOWN: Pump Diaphrams- Standard #JDKH18 (on left), and Honda Diaphragm #JDKH04 (on right)

Quickshot 3 Adjustable Pump Cover- Part #JDAP05

Replacement Float Needle and Seat for FCR-MX Select Models 2000-2005

The Float Needle Seat is Removable and Can Be Replaced with This Version FCR-MX

Quickshot 3 Adjustable Pump Cover- Part #JDAP05

FCR Carb disassembly for clearing pump nozzle

Cleaning Pump Nozzle- Location to Spray Carb Cleaner

KTM Slide with Notch and JDJetting Modified Replacement Slide

KTM Slide with Notch and JDJetting Modified Replacement Slide

KTM Slide with Notch and JDJetting Modified Replacement Slide

KTM Slide with Notch and JDJetting Modified Replacement Slide

KTM Slide with Notch

JDJetting Modified Replacement Slide for KTM

KTM Slide with Notch and JDJetting Modified Replacement Slide

JDJetting Modified Replacement Slide for KTM

Adjustable Pump Cover No Longer Available

CO Content vs AirFuel Mixture

Needle_change_of_fuel_with_clip

Needle_percent_change_of_fuel_with_clip

Needle_change_of_fuel_with_clip_NOZI

Needle_percent_change_of_fuel_with_clip_NOZI

Needle_change_of_fuel_with_clip_N8RH

N8RH VS N3EH 2 and 3

Needle_percent_change_of_fuel_with_clip_N8RH

Keihin Needle Designs N3CA to N3CM

Needle NOZH vs DDJ DEL CEL CCK

Needle NOZH vs DDJ DEL CEL CCK

Keihin PWK Needles NOZE NOZF NOZG NOZH

Needle_and_pilot_jet_Change

Needle_and_pilot_jet_Change Percent

NAFG_vs_N8RG vs Single Taper R1471E

NAFG_vs_N8RG vs Single Taper R1471E

NAFG_vs_N8RG vs Single Taper R1371E

NAFG_vs_N8RG vs Single Taper R1371E

Textbook Richening with needle clip vs taper and main jet

PWK 38mm vs 36mm Engine Side

PWK 38mm vs 36mm Air Filter Side

Jetting Guide Examples of Double and Triple Taper Needles Profiles

Jetting Guide Examples of Double and Triple Taper Needles

N3CW and Richer Needles by Half Clip

N3CW and Richer Needles by Half Clip Percent Change in Fuel
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Keihin 016.167 PWK 38mm Air Striker Carburetor

Carburetor Tuning Range Chart: Keihin Needle Chart with Small Needle Tip Notation: Suzuki DRZ400S BSR Carburetor: FCR-MX Carburetor Parts: Eploded View 1: Eploded View 2: Carburetor Clamps and Fittings: FCR1 Single Carburetor Parts: Accelerator Pump Diaphragm Spacer in Jet Kit JDK015, JDK013, and JDK002: Needle Clip Positions for FCR carburetor. Keihin was asked by the top racing teams to design state of the art carburetors for their factory Super Bike racing machines. The FCR carburetors are the result of that request. Along with the highest level of technology available, the FCRs have proven their advantage with race wins around the world. 1980 Indian AMI50 Indian AMI50 carburetor Keihin PA M0A-A. Late PC50: The carburetor changed from “donut” float to a swinging float, and a NC50-type float bowl and gasket. The 1973-77 PC50K1 and 1973-78 PF50 engine and carb are the same as the Taiwan remake engine and Keihin carburetor used on the 1978-83 Indian moped.

Keihin carburetor manual pdf
  • The Keihin PWK Air Striker two stroke carburetor is refined to perfection and has set the standard among motocross racing carburetors
  • PWK Air Striker directs air to main nozzle for improved signal and throttle response
  • Chromed semi-flat (D) throttle valve for excellent response and more flow at high rpm
  • Available in two popular sizes to cover all your horsepower requirements
  • Throttle bores sized to give maximum power and easy jetting with jetting parts available
Carburetors

The Keihin PWK Air Striker Two Stroke carburetor is refined to perfection and has set the standard among motocross racing carburetors. With these features you can take advantage of Keihin’s superior performance: PWK Air Strikers: Directs air to main nozzle for improved signal and throttle response. Chromed semi-flat (D) throttle valve for excellent response and more flow at high RPM. Throttle bores sized to give maximum power. Easy jetting with Jetting parts available. Available in two popular s
More Info

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Old Keihin Carburetor Diagram

Keihin Carburetors Manual


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Keihin Carburetor Service Manual

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