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Helpful Tips JDJetting Carburetor Parts -Picture Gallery

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PWK 38 AG Short Body with Air Screw and Idle Speed Screw
PWK 38 AG Short Body with Air Screw and Idle Speed Screw		 JDJetting Jet Kit Package
JDJetting Jet Kit Package		 4-Stroke Fuel Screw Mixture Lean to Rich in 1/2 Turn Steps
4-Stroke Fuel Screw Mixture Lean to Rich in 1/2 Turn Steps		 Air Fuel Screw Mixture Lean to Rich
Air Fuel Screw Mixture Lean to Rich
Diaphragm and Leak Jet Effects on Accelerator Pump Flow
Diaphragm and Leak Jet Effects on Accelerator Pump Flow		 Approximate Pump Timing Gap to Check, Allowing Full Pump Refill and Immediate Squirt with Throttle Use
Approximate Pump Timing Gap to Check, Allowing Full Pump Refill and Immediate Squirt with Throttle Use		 Setting Pump Timing screw
Setting Pump Timing screw		 Route the bottom overflow tube to reduce spilled fuel in rough terrain
Route the bottom overflow tube to reduce spilled fuel in rough terrain
Leak Jet and Diaphragm Effects on Accelerator Pump Flow Volume
Leak Jet and Diaphragm Effects on Accelerator Pump Flow Volume		 Accelerator Pump with O-ring Wrapped Around Linkage as Described in Kit
Accelerator Pump with O-ring Wrapped Around Linkage as Described in Kit		 Yamaha and Kawasaki Fuel Screw Block
Yamaha and Kawasaki Fuel Screw Block		 Float Bowl and Leak Jet- JDJetting part #JDKH05
Float Bowl and Leak Jet- JDJetting part #JDKH05
Punching out Fuel Screw Cover
Punching out Fuel Screw Cover		 Removed Fuel Screw Cover
Removed Fuel Screw Cover		 NOTE- THESE ARE PICTURED UPSIDE-DOWN: Pump Diaphrams- Standard #JDKH18 (on left), and Honda Diaphragm #JDKH04 (on right)
NOTE- THESE ARE PICTURED UPSIDE-DOWN: Pump Diaphrams- Standard #JDKH18 (on left), and Honda Diaphragm #JDKH04 (on right)		 The Float Needle Seat is Removable and Can Be Replaced with This Version FCR-MX
The Float Needle Seat is Removable and Can Be Replaced with This Version FCR-MX
Float Seat and pin parts.jpg
Float Seat and pin parts.jpg		 Slide Plates:FCR-MX (M Stamp) Slant-FCR (L Stamp:DRZ400E, 99-02 KTM, 98-99 YZ/WR400) and FCR-Small (CRF150R)
Slide Plates:FCR-MX (M Stamp) Slant-FCR (L Stamp:DRZ400E, 99-02 KTM, 98-99 YZ/WR400) and FCR-Small (CRF150R)		 Engine side view with slide plate correctly oriented in the carb and on the bench
Engine side view with slide plate correctly oriented in the carb and on the bench		 FCR Carburetor slide and Vacuum Release Plate (square end MUST be oriented down)
FCR Carburetor slide and Vacuum Release Plate (square end MUST be oriented down)
Vacuum Plate Seal Orientation 6
Vacuum Plate Seal Orientation 6		 Vacuum Plate Seal Orientation 4
Vacuum Plate Seal Orientation 4		 Vacuum Plate Seal Orientation 2
Vacuum Plate Seal Orientation 2		 Vacuum Release Plate (square end down)
Vacuum Release Plate (square end down)
Disassebled FCR Carburetor Body - Note - The body gasket is only available for newer models
Disassebled FCR Carburetor Body - Note - The body gasket is only available for newer models		 Leak Jet Effects on Air/Fuel - Blocked Jet, #50, and #80
Leak Jet Effects on Air/Fuel - Blocked Jet, #50, and #80		 Fuel Screw Effects in 1/2 Turn Steps
Fuel Screw Effects in 1/2 Turn Steps		 Linkage-closeup- as the screw is turned inwards, the rod touch-point is delayed
Linkage-closeup- as the screw is turned inwards, the rod touch-point is delayed
BKMod to Reduce the FCR-MX Accelerator Pump Stroke
BKMod to Reduce the FCR-MX Accelerator Pump Stroke		 Turn the Choke Knob on PJ and PWM carburetor to set the idle speed
Turn the Choke Knob on PJ and PWM carburetor to set the idle speed		 FCR-MX Accel Pump Linkage- as the screw is turned inwards, the rod touch-point is delayed
FCR-MX Accel Pump Linkage- as the screw is turned inwards, the rod touch-point is delayed		 FCR-MX 2000 Yamaha Version
FCR-MX 2000 Yamaha Version
Honda TMX versions, with Throttle Position Sensor on left
Honda TMX versions, with Throttle Position Sensor on left		 2004-2007 Honda TMX compared to 2001-2003
2004-2007 Honda TMX compared to 2001-2003		 2004-2007 Honda TMX vs 2001-2003
2004-2007 Honda TMX vs 2001-2003		 Mikuni TMX Slide 1989
Mikuni TMX Slide 1989
Mikuni TMX Slide 1989
Mikuni TMX Slide 1989		 Jet Kit Needles with Leaner Taper Position and Clip Offset
Jet Kit Needles with Leaner Taper Position and Clip Offset		 Keihin PWM and PWK Air Striker
Keihin PWM and PWK Air Striker		 KTM 2-Stroke Stock 36mm PWK
KTM 2-Stroke Stock 36mm PWK
KTM 2-Stroke 38mm PWM
KTM 2-Stroke 38mm PWM		 FCR-MX Accelerator Pump Cams and Followers
FCR-MX Accelerator Pump Cams and Followers		 FCR_Pump_Cam_KTM
FCR_Pump_Cam_KTM		 FCR-MX Accelerator Pump Cams and Followers
FCR-MX Accelerator Pump Cams and Followers
FCR-MX Carburetor with Throttle Position Sensor (TPS) Electrical Lead
FCR-MX Carburetor with Throttle Position Sensor (TPS) Electrical Lead		 FCR-MX Carburetor - Yamaha Air Cut Valve to richen on deceleration
FCR-MX Carburetor - Yamaha Air Cut Valve to richen on deceleration		 KTM400EXC Dyno OBCVR with no Main Jet
KTM400EXC Dyno OBCVR with no Main Jet		 Keihin Accelerator Pump Lower/Upper Check Valves
Keihin Accelerator Pump Lower/Upper Check Valves
4 Keihin CB750 Carbs Fed by One Accelerator Pump Diaphragm
4 Keihin CB750 Carbs Fed by One Accelerator Pump Diaphragm		 Sudco Single Taper vs JD Triple Taper
Sudco Single Taper vs JD Triple Taper		 JDJetting Needle Identification- Scribe Lines Below Clip Slots
JDJetting Needle Identification- Scribe Lines Below Clip Slots		 Standard Keihin Needles.jpg
Standard Keihin Needles.jpg
Honda Needle A705.jpg
Honda Needle A705.jpg		 Pinched Linkage - By pinching the linkage almost closed, the pump will only partly refill and squirt less fuel
Pinched Linkage - By pinching the linkage almost closed, the pump will only partly refill and squirt less fuel		 IM001254.JPG
IM001254.JPG		 IM001256.JPG
IM001256.JPG
FCR Carb Accelerator Pump Covers and Pump Timing Linkage Spacer
FCR Carb Accelerator Pump Covers and Pump Timing Linkage Spacer		 Keihin 38mm PWM, 38mm PWK Air Striker, and 38mm PWK AG TP Version Carburetors
Keihin 38mm PWM, 38mm PWK Air Striker, and 38mm PWK AG TP Version Carburetors		 PWK AirStriker PWK AG with TPS Option
PWK AirStriker PWK AG with TPS Option		 Fuel Screw and Pump Parts
Fuel Screw and Pump Parts
FCR Removeable Intake Flange and Pilot Air (LEFT) and Main Air (RIGHT) Jets
FCR Removeable Intake Flange and Pilot Air (LEFT) and Main Air (RIGHT) Jets		 Float Bowl and other associated Parts
Float Bowl and other associated Parts		 Keihin FCR-MX carbs
Keihin FCR-MX carbs		 Keihin FCR-MX carbs
Keihin FCR-MX carbs
FCR-MX Carbs with no Main Air Jet- Only the Pilot Air Jet is visible on the left
FCR-MX Carbs with no Main Air Jet- Only the Pilot Air Jet is visible on the left		 Accelerator pump testing
Accelerator pump testing		 Accelerator pump testing
Accelerator pump testing		 Accelerator Pump testing: Diaphragms, Leak Jets, Covers
Accelerator Pump testing: Diaphragms, Leak Jets, Covers
Accelerator Pump Linkage Safety Wired to be Rigid
Accelerator Pump Linkage Safety Wired to be Rigid		 Test stand for accelerator pump duration and distance
Test stand for accelerator pump duration and distance		 Accelerator Pump Covers
Accelerator Pump Covers		 Linkage springs
Linkage springs
Pump Timing Screw
Pump Timing Screw		 Main Jets 4.jpg
Main Jets 4.jpg		 Main Jet Section.jpg
Main Jet Section.jpg		 FCR Needle Graph0.JPG
FCR Needle Graph0.JPG
FCR Needle Graph1.jpg
FCR Needle Graph1.jpg		 FCR Needle Graph2.jpg
FCR Needle Graph2.jpg		 FCR Needle Graph3.jpg
FCR Needle Graph3.jpg		 FCR Needle Graph4.jpg
FCR Needle Graph4.jpg
FCR Needle Graph5.jpg
FCR Needle Graph5.jpg		 PWK Slides 6 (#JDKH11), 7 (#JDKH12), 8 (#JDKH13), from Left to Right
PWK Slides 6 (#JDKH11), 7 (#JDKH12), 8 (#JDKH13), from Left to Right 		Backwards FCR Slide Plate
Backwards FCR Slide Plate		 FCR_carb.jpg
FCR_carb.jpg
JDJetting
JDJetting		 Air Fuel Screw Mixture Lean to Rich 1.jpg
Air Fuel Screw Mixture Lean to Rich 1.jpg		 Keihin PWK Carburetor Slide Cutaway Described
Keihin PWK Carburetor Slide Cutaway Described		 Keihin Slide Cutaway Height C.A. Measurement (MM)
Keihin Slide Cutaway Height C.A. Measurement (MM)
FCR1 Accelerator Pump Mod
FCR1 Accelerator Pump Mod		 FCR1 Accelerator Pump Mod
FCR1 Accelerator Pump Mod		 FCR1 Accelerator Pump Mod
FCR1 Accelerator Pump Mod		 FCR1 Accelerator Pump Mod
FCR1 Accelerator Pump Mod
35mm FCR1 Carburetor
35mm FCR1 Carburetor		 FCR MX Carb
FCR MX Carb		 IM000535.JPG
IM000535.JPG		 PWK GRAPHS FOR EXPLANATION
PWK GRAPHS FOR EXPLANATION
PWK GRAPHS FOR EXPLANATION
PWK GRAPHS FOR EXPLANATION		 IMG_1445.JPG
IMG_1445.JPG		 Dyno Testing Measuring Horsepower
Dyno Testing Measuring Horsepower		 FCR-MX Carburetor and Pump Linkage
FCR-MX Carburetor and Pump Linkage
Accessing the needle from the top of the slide on the FCR Carburetor - This carb has an emissions stop to limit throttle opening
Accessing the needle from the top of the slide on the FCR Carburetor - This carb has an emissions stop to limit throttle opening		 Accessing the Main Jet and Pilot Jet by Turning the Carb
Accessing the Main Jet and Pilot Jet by Turning the Carb		 FCR Standard (98-99 YZ/WR400) pilot jet on left, and newer FCR-MX pilot jet (2000+ YZ/WR 400-450) and PWK pilot jet on right
FCR Standard (98-99 YZ/WR400) pilot jet on left, and newer FCR-MX pilot jet (2000+ YZ/WR 400-450) and PWK pilot jet on right		 PWK Pilot Jet and Air Holes
PWK Pilot Jet and Air Holes
Keihin Drain Screw All.jpg
Keihin Drain Screw All.jpg		 Keihin PWK Carburetor Dimensions
Keihin PWK Carburetor Dimensions		 Keihin PWK Carburetor Dimension Chart
Keihin PWK Carburetor Dimension Chart		 carbswap1.jpg
carbswap1.jpg
60463416_MeasuredPumpForce2.jpg
60463416_MeasuredPumpForce2.jpg		 PWM Carburetor Stock Slide Before Modification
PWM Carburetor Stock Slide Before Modification		 ***PWM Carburetor Slide After Modification- File notch as shown, 2mm in depth
***PWM Carburetor Slide After Modification- File notch as shown, 2mm in depth		 PWM Carburetor Before Mod
PWM Carburetor Before Mod
***PWM- Visual Check After Slide Mod- 1.0 - 1.5mm opening
***PWM- Visual Check After Slide Mod- 1.0 - 1.5mm opening		 PWM Carburetor Before Modification
PWM Carburetor Before Modification		 ***PWM Carburetor After Needle Shroud Modification - File notch as shown
***PWM Carburetor After Needle Shroud Modification - File notch as shown		 PWM Carburetor Before Mod
PWM Carburetor Before Mod
***PWM- Visual Check After Needle Shroud Mod- Needle is Visible
***PWM- Visual Check After Needle Shroud Mod- Needle is Visible		 PWM Carburetor Slide Mod- Before and After
PWM Carburetor Slide Mod- Before and After		 PWK Slide from KTM
PWK Slide from KTM		 PWK Needle Shroud on the 36mm PWK carburetor
PWK Needle Shroud on the 36mm PWK carburetor
Keihin PWK Slide from KTM
Keihin PWK Slide from KTM		 PWK carburetors, KTM and Standard Air Striker
PWK carburetors, KTM and Standard Air Striker		 AirStriker and Older PWK that also looks like the PWM Intake
AirStriker and Older PWK that also looks like the PWM Intake		 38mm Keihin PWM Carburetor - Choke knob turned to adjust idle speed. Air screw is brass on side by fuel inlet.
38mm Keihin PWM Carburetor - Choke knob turned to adjust idle speed. Air screw is brass on side by fuel inlet.
PWK Air Striker - part #JDKH08
PWK Air Striker - part #JDKH08		 Mikuni TMX Carburetor
Mikuni TMX Carburetor		 Mikuni TM Carburetor
Mikuni TM Carburetor		 thumbnail.jpeg
thumbnail.jpeg
image1.png
image1.png		 PWK Air Striker Carburetor
PWK Air Striker Carburetor		 Keihin PWK Cable Holder (fits PWK and PWM)
Keihin PWK Cable Holder (fits PWK and PWM)		 Keihin PWK Slide Cable Holder (fits PWK and PWM)
Keihin PWK Slide Cable Holder (fits PWK and PWM)
Cable Holder PWM ONLY (has a bump on top) -Do NOT use in PWK Slide, Will BIND NEEDLE
Cable Holder PWM ONLY (has a bump on top) -Do NOT use in PWK Slide, Will BIND NEEDLE		 YZ250 Cable Holder Parts are Different than JDJetting JDKH16 and Do Not Interchange
YZ250 Cable Holder Parts are Different than JDJetting JDKH16 and Do Not Interchange		 PWM Carburetor cable holder is different than PWK Carb cable holder- Hole is smaller and Binds the Needle if used in a PWK Slide
PWM Carburetor cable holder is different than PWK Carb cable holder- Hole is smaller and Binds the Needle if used in a PWK Slide		 PWM Carburetor cable holder is different than PWK Carb cable holder
PWM Carburetor cable holder is different than PWK Carb cable holder
250 300 Keihin PWK 36mm Carburetor
250 300 Keihin PWK 36mm Carburetor		 GasGas 250 300 PWK 36mm Carburetor
GasGas 250 300 PWK 36mm Carburetor		 FCR Needle Jet
FCR Needle Jet		 Slant FCR vs FCR MX Carbs
Slant FCR vs FCR MX Carbs
Slant FCR Carb
Slant FCR Carb		 Slant FCR Carb- Fuel Inlet Side
Slant FCR Carb- Fuel Inlet Side		 Slant FCR vs FCR-MX Carburetor- Fuel Line Side
Slant FCR vs FCR-MX Carburetor- Fuel Line Side		 Keihin Older Version FCR 39mm Carb
Keihin Older Version FCR 39mm Carb
Keihin FCR-MX Pump Linkage Honda 06 vs 07 CRF450R
Keihin FCR-MX Pump Linkage Honda 06 vs 07 CRF450R		 PWK Carb Power Jet Tube Viewed from Motor Side
PWK Carb Power Jet Tube Viewed from Motor Side		 PWK Carb Power Jet Tube Closeup
PWK Carb Power Jet Tube Closeup		 PWK Carb Power Jet Tube Intake Side
PWK Carb Power Jet Tube Intake Side
PWK Carb Power Jet Location in Body on Right
PWK Carb Power Jet Location in Body on Right		 Keihin PWK AG Short Body Carb
Keihin PWK AG Short Body Carb		 FCR MX Carb Max Needle Depth
FCR MX Carb Max Needle Depth		 Example of lean clip positions on needle
Example of lean clip positions on needle
PWK Slide Yamaha YZ250 vs All Others
PWK Slide Yamaha YZ250 vs All Others		 Humidity and Temperature effects with Oxygen
Humidity and Temperature effects with Oxygen		 PWK Slide Cable Holder and Needle Clip Recess
PWK Slide Cable Holder and Needle Clip Recess		 PWK AG vs PWK AIR STRIKER Jet Blocks.jpg
PWK AG vs PWK AIR STRIKER Jet Blocks.jpg
PWK AG vs PWK AIR STRIKER Jet Blocks B.jpg
PWK AG vs PWK AIR STRIKER Jet Blocks B.jpg
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