HONDA CRF450R

****If your jet does not measure like ours do not buy it because it will not work****

All jet sales are final.  
Our year, make model fitment guides can assist but are not 100% accurate due to numerous reasons. We have no control over jets once they leave us; some customers drill them out, test and tune etc.  See also additional things to check before ordering. If needing help send us a picture of the jets removed from the carb and also read identify that jet

Please take a moment right now to measure the jet prior to ordering.


*** If your jet does not measure like ours do not buy it because it will not work ****

TYPICAL JET SIZE:
Main Jet - 168*
Slow Jet - 42*
*Typical size only- verify jet size and compare dimensions to those listed before ordering. See Jet Finder for other jets available.

Jet Kit
Honda CRF450R 02-08 jet kit $32.89
The jet kit comes with all the following brand new parts: Precision machined main jets: 170, 172, 175, 178, 180, 182, 185, 188, 190 and 4 stainless steel allen head bolts for the carb bowl. Instructions on jetting included.
This kit is for modifications such as the following: aftermarket air filter, air box lid removed, modified air box, aftermarket slip-on exhaust or completely modified exhaust or cams.

D Shaped fuel mixture screw adjustment bit

These fit mixture screws that are 4.5mm diameter
Jetsrus D bit

Motion pro D bit


Needles
These needles are approximately 104.4mm long. If the needles in carb do not measure that length then do not order these. There are no refunds on needles.
Click here for needles

Air Jet
GENUINE KEIHIN SLOW N424-330

jet keihin n424-330
OVERALL LENGTH = 13mm
HEAD DIAMETER = 4.5mm
THREAD DIAMETER = 4.4mm
Genuine Keihin jets price each *

GENUINE Keihin jet 80 $8.09
 
Equivalent Mikuni jet 80 $6.89
GENUINE Keihin jet 85 $8.09
 
Equivalent Mikuni jet 85 $6.89
GENUINE Keihin jet 90 $8.09
 
Equivalent Mikuni jet 90 $6.89
GENUINE Keihin jet 95 $8.09
 
Equivalent Mikuni jet 95 $6.89
GENUINE Keihin jet 100 $8.09
 
Equivalent Mikuni jet 100 $6.89
GENUINE Keihin jet 105 $8.09
 
Equivalent Mikuni jet 105 $6.89
GENUINE Keihin jet 110 $8.09
 
Equivalent Mikuni jet 110 $6.89
GENUINE Keihin jet 115 $8.09
   

Slow / Pilot Jets - can be one of two types scroll down for other slow jet
Keihin slow 36-xxx and N424-26


OVERALL LENGTH = 23.5mm
THREAD DIAMETER = 5.9mm
HEAD DIAMETER = 4.9mm

GENUINE keihin jets - price each*   OEM EQUIVALENT keihin jets - price each
GENUINE Keihin jet 35 $6.69
   
GENUINE Keihin jet 38 $6.69
 
OEM Equivalent Keihin jet 38 $4.79
GENUINE Keihin jet 40 $6.69
 
OEM Equivalent Keihin jet 40 $4.79
GENUINE Keihin jet 42 $6.69
 
OEM Equivalent Keihin jet 42 $4.79
GENUINE Keihin jet 45 $6.69
 
OEM Equivalent Keihin jet 45 $4.79
GENUINE Keihin jet 48 $6.69
 
OEM Equivalent Keihin jet 48 $4.79
GENUINE Keihin jet 50 $6.69
 
OEM Equivalent Keihin jet 50 $4.79
GENUINE Keihin jet 52 $6.69
 
OEM Equivalent Keihin jet 52 $4.79
GENUINE Keihin jet 55 $6.69
 
OEM Equivalent Keihin jet 55 $4.79
GENUINE Keihin jet 58 $6.69
 
OEM Equivalent Keihin jet 58 $4.79
GENUINE Keihin jet 60 $6.69
 
OEM Equivalent Keihin jet 60 $4.79
GENUINE Keihin jet 62 $6.69
 
OEM Equivalent Keihin jet 62 $4.79
GENUINE Keihin jet 65 $6.69
 
OEM Equivalent Keihin jet 65 $4.79
GENUINE Keihin jet 68 $6.69
 
OEM Equivalent Keihin jet 70 $4.79
GENUINE Keihin jet 70 $6.69
   
GENUINE Keihin jet 72 $6.69
   
GENUINE Keihin jet 75 $6.69
   
GENUINE Keihin jet 78 $6.69
   
GENUINE Keihin jet 80 $6.69
   

Keihin slow 26-xxx and N424-21

OVERALL LENGTH = 28mm
THREAD DIAMETER = 5.9mm
HEAD DIAMETER = 4.9mm
GENUINE keihin jets - price each*   OEM EQUIVALENT keihin jets - price each
GENUINE Keihin jet 35 $6.35
   
GENUINE Keihin jet 38 $6.35
 
OEM equivalent Keihin jet 38 $4.79
GENUINE Keihin jet 40 $6.35
 
OEM equivalent Keihin jet 40 $4.79
GENUINE Keihin jet 42 $6.35
 
OEM equivalent Keihin jet 42 $4.79
GENUINE Keihin jet 45 $6.35
 
OEM equivalent Keihin jet 45 $4.79
GENUINE Keihin jet 48 $6.35
 
OEM equivalent Keihin jet 48 $4.79
GENUINE Keihin jet 50 $6.35
 
OEM equivalent Keihin jet 50 $4.79
GENUINE Keihin jet 52 $6.35
 
OEM equivalent Keihin jet 52 $4.79
GENUINE Keihin jet 55 $6.35
 
OEM equivalent Keihin jet 55 $4.79
GENUINE Keihin jet 58 $6.35
 
OEM equivalent Keihin jet 58 $4.79
GENUINE Keihin jet 60 $6.35
 
OEM equivalent Keihin jet 60 $4.79
GENUINE Keihin jet 62 $6.35
   
GENUINE Keihin jet 65 $6.35
 
OEM equivalent Keihin jet 65 $4.79
GENUINE Keihin jet 68 $6.35
   
GENUINE Keihin jet 70 $6.35
 
OEM equivalent Keihin jet 70 $4.79
GENUINE Keihin jet 72 $6.35
   
GENUINE Keihin jet 75 $6.35
   
GENUINE Keihin jet 78 $6.35
   
GENUINE Keihin jet 80 $6.35
   

Main Jets
Keihin hex main 25-xxx 99101-357

jet keihin main 99101-357
OVERALL LENGTH = 16.5mm
THREAD DIAMETER = 4.9mm

GENUINE keihin jets - price each*   OEM EQUIVALENT keihin jets - price each
GENUINE Keihin jet 80 $6.09
GENUINE Keihin jet 82 $6.09
GENUINE Keihin jet 85 $6.09
GENUINE Keihin jet 88 $6.09
GENUINE Keihin jet 90 $6.09
GENUINE Keihin jet 92 $6.09
GENUINE Keihin jet 95 $6.09
OEM equivalent Keihin jet 95 $3.29
GENUINE Keihin jet 98 $6.09
OEM equivalent Keihin jet 98 $3.29
GENUINE Keihin jet 100 $6.09
OEM equivalent Keihin jet 100 $3.29
GENUINE Keihin jet 102 $6.09
OEM equivalent Keihin jet 102 $3.29
GENUINE Keihin jet 105 $6.09
OEM equivalent Keihin jet 105 $3.29
GENUINE Keihin jet 108 $6.09
OEM equivalent Keihin jet 108 $3.29
GENUINE Keihin jet 110 $6.09
OEM equivalent Keihin jet 110 $3.29
GENUINE Keihin jet 112 $6.09
OEM equivalent Keihin jet 112 $3.29
GENUINE Keihin jet 115 $6.09
OEM equivalent Keihin jet 115 $3.29
GENUINE Keihin jet 118 $6.09
OEM equivalent Keihin jet 118 $3.29
GENUINE Keihin jet 120 $6.09
OEM equivalent Keihin jet 120 $3.29
GENUINE Keihin jet 122 $6.09
OEM equivalent Keihin jet 122 $3.29
GENUINE Keihin jet 125 $6.09
OEM equivalent Keihin jet 125 $3.29
GENUINE Keihin jet 128 $6.09
OEM equivalent Keihin jet 128 $3.29
GENUINE Keihin jet 130 $6.09
OEM equivalent Keihin jet 130 $3.29
GENUINE Keihin jet 132 $6.09
OEM equivalent Keihin jet 132 $3.29
GENUINE Keihin jet 135 $6.09
OEM equivalent Keihin jet 135 $3.29
GENUINE Keihin jet 138 $6.09
OEM equivalent Keihin jet 138 $3.29
GENUINE Keihin jet 140 $6.09
OEM equivalent Keihin jet 140 $3.29
GENUINE Keihin jet 142 $6.09
OEM equivalent Keihin jet 142 $3.29
GENUINE Keihin jet 145 $6.09
OEM equivalent Keihin jet 145 $3.29
GENUINE Keihin jet 148 $6.09
OEM equivalent Keihin jet 148 $3.29
GENUINE Keihin jet 150 $6.09
OEM equivalent Keihin jet 150 $3.29
GENUINE Keihin jet 152 $6.09
OEM equivalent Keihin jet 152 $3.29
GENUINE Keihin jet 155 $6.09
OEM equivalent Keihin jet 155 $3.29
GENUINE Keihin jet 158 $6.09
OEM equivalent Keihin jet 158 $3.29
GENUINE Keihin jet 160 $6.09
OEM equivalent Keihin jet 160 $3.29
GENUINE Keihin jet 162 $6.09
OEM equivalent Keihin jet 162 $3.29
GENUINE Keihin jet 165 $6.09
OEM equivalent Keihin jet 165 $3.29
GENUINE Keihin jet 168 $6.09
OEM equivalent Keihin jet 168 $3.29
GENUINE Keihin jet 170 $6.09
OEM equivalent Keihin jet 170 $3.29
GENUINE Keihin jet 172 $6.09
OEM equivalent Keihin jet 172 $3.29
GENUINE Keihin jet 175 $6.09
OEM equivalent Keihin jet 175 $3.29
GENUINE Keihin jet 178 $6.09
OEM equivalent Keihin jet 178 $3.29
GENUINE Keihin jet 180 $6.09
OEM equivalent Keihin jet 180 $3.29
GENUINE Keihin jet 182 $6.09
OEM equivalent Keihin jet 182 $3.29
GENUINE Keihin jet 185 $6.09
OEM equivalent Keihin jet 185 $3.29
GENUINE Keihin jet 188 $6.09
OEM equivalent Keihin jet 188 $3.29
GENUINE Keihin jet 190 $6.09
OEM equivalent Keihin jet 190 $3.29
GENUINE Keihin jet 192 $6.09
OEM equivalent Keihin jet 192 $3.29
GENUINE Keihin jet 195 $6.09
OEM equivalent Keihin jet 195 $3.29
GENUINE Keihin jet 198 $6.09
OEM equivalent Keihin jet 198 $3.29
GENUINE Keihin jet 200 $6.09
OEM equivalent Keihin jet 200 $3.29
GENUINE Keihin jet 205 $6.09
OEM equivalent Keihin jet 205 $3.29
GENUINE Keihin jet 210 $6.09
OEM equivalent Keihin jet 210 $3.29
GENUINE Keihin jet 215 $6.09
OEM equivalent Keihin jet 215 $3.29
GENUINE Keihin jet 220 $6.09
OEM equivalent Keihin jet 220 $3.29
GENUINE Keihin jet 230 $6.09

carb bowl screws
CARB BOWL SCREW - Sold each, modify cart for desired quantity *
Stainless steel allen head screw for carb bowl.
Length dimension is the shaft length of the fastener not including the length of the head.
Example: M4 x 10 (10 mm shaft length)
Sold each carb bowl screw M4 x 10 (0.39") $1.49
Sold each carb bowl screw M4 x 12 (0.47") $1.55
Sold each carb bowl screw M4 x 14 (0.55") $1.59
Sold each carb bowl screw M5 x 16 (0.62") $1.61
Sold each carb bowl screw M5 x 20 (0.78") $1.63

NEEDLE SHIM WASHERS
Stainless washers.
These are not a precision part, they simply raise the needle.

Needle shim most Mikuni 2.7mm ID x 6.30mm OD 0125A2M2.7 JRU-8027A 10 pieces

Needle shim most Keihin 3.2mm ID x 7mm OD 0125A2M3.2 JRU-8032 10 pieces

Needle shim 3.7mm ID x 7.9mm OD 0125A2M3.7 JRU-8037B 10 pieces

wrench_hex_carb_bowl
HEX wrench for carb bowl screws
hex wrench
Metric hex wrench short arm for screws $0.87
Extra short arm ball end for tight fitting areas 19109

TORX wrench for carb bowl screws
Extra short arm for tight fitting areas TORX 19110- note our screws are hex, this item is placed here as some carbs use torx screws.