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The Official Duncan Racing ATV Buyers Guide

YOUR GUIDE TO THE HONDA 400EX

ENGINE

S-1 Bolt-On Kit

BOLT-ON KITS

STAGE 1 Kit (S-1) 
#BK4-4000   $699.00
Includes: Complete Fat Boy 4 Exhaust System (with STD Muffler), Jet Kit, Pro Flow Air Cleaner Kit (Pro Flow flange, K&N, Outerwear)

To purchase the Stage 1 Kit click here

 

S-2 Bolt-On Kit

STAGE 2 Kit (S-2) 

#BK4-4000-VHP    $1249.00
Includes:
S-1 Bolt on Kit (Complete Fat Boy 4 Exhaust System (with STD Muffler), Jet Kit, Pro Flow Air Cleaner Kit (Pro Flow flange, K&N, Outerwear), Vortex X10 CDI, DRI Graphics & Seat Cover Kit

To purchase the Stage 2 Kit click here
Power Gains:
15-20% gain in HP
Excellent Start Up Performance Mods. Stage 1 Power Kits are designed to work with most DRI engine kits
For a slightly more aggressive Bolt-On we recommend using the DRI's Stage 2 HPV Bolt Kits.
*Choice of Graphic and Seat cover color where applicable.

 

Engine Kits: 440 NATIONAL Kit             
#EK-44NT-E
   $2350.00

Not available online- Please call DRI to purchase

440 National Kit

Includes: Fat Boy 4 Complete Exhaust System, 440 piston kit-sleeve-steel head gasket (installed), Camshaft, HD Valve Springs w/Titanium Retainers, Shortened Bronze Guides, DR Head Porting (with guides out), 3-Angle Valve Job, Edelbrock Carburetor Kit, Instructions, DR Tech Support.

Kit Options: Camshafts-Low End Cam, Mid/Top End, or Full Top End
Compression: 10-1, 11-1, 12-1, 13-1


440 Nat. Kit w/Twist Sleve Only

Kit Price is plus any OEM parts.
Customer must send in to DRI their; Cylinder, Head, Camshaft for modification. (or purchase new cores)

Kit may also be purchased w/o Edelbrock Carburetor Price $1950.00


Recommended Upgrades:
Rocker Arms

Hardface Rocker Arms              
 
#MC-196-RA
  
$65.00 ea.
Customer must send in cores for modification or pay core charge
*Rocker hardfacing is mandatory for cam reliability. Each engine use 4-rockers
Upgrade clutch system to 8-Plate system (see below)

 

Optional Upgrades:

PC 4000 Cylinder                       
#PC-4005
  
$450.00

 

Big Valve Kit  

#DR-03116   $230.00

Kit Includes: (4) Oversized Valves and (4) Guide Seals.

 

Vortex Ignition (Standard)               

#VT-140S  $449.00

NOTE: Ignition curve advance limited because of stock flywheel pick up location.   Only allows limited ignition curve modification.   Moderate power gain in low to mid range.

To purchase the Vortex Ignition click here

 

Vortex Ignition (High Performance) 

DISCONTINUED

#VT-14HP  $449.00

NOTE: Requires stock flywheel pick up modification.   Customer must send in flywheel to DRI for modification. Price for modification $100.00. The flywheel modification allows for maximum performance gain with the Vortex CDI. Power gain low to high range.

To purchase the Vortex Ignition click here

 

INDIVIDUAL ENGINE COMPONENTS (all items may be purchased separately)

Fat Boy 4 with Exhaust
Muffler Turndown (w/o ring)


FAT BOY 4 Complete Stainless Exhaust System
#FB4-EH4000
  $599.00

To purchase the Fat Boy 4 System click here


FAT BOY 4 HQ Complete Stainless Exhaust System
 #FB4-EH4000-HQ   $649.00

Features: 30% larger volume, redesigned packing and core. Reduces sound output by 3-4 dB.

To purchase the Fat Boy 4 HQ System click here

 

FAT BOY 4 HQ Muffler 
#FB4-HQH4000
   $249.00

*Replaces standard Fat Boy 4 muffler on existing exhaust system.

To purchase the Fat Boy 4 HQ Muffler click here


Optional Accessories 

#FB4-4A250   $39.95  Turndown (bolts on w/o-ring)          
#06-554         $17.95   Spark Arrestor (requires turndown)  

 

QP-2 Quiet Tip

#FB4-QP-2   $129.95

Bolts on rear end cap of Fat Boy 4.

Lowers DB readings a minimum of 2-3 dbs.

Forestry approved when used with screen.

* Note: Some rejetting may be required.

** Available in silver only
To purchase the QP-2 Quiet Tip click here

QP 2 with screen
Fat Boy 4 with QP-2

To purchase Fat Boy 4 Accessories click here

To purchase Fat Boy 4 Replacement Parts click here

 

Custom Colored FAT BOY 4 Mufflers

Custom anodized color components (muffler, end cap & turndown) are at an additional cost to the base price for the Fat Boy 4 and the components (Turn down & End cap).

*Available by special order only

**Lead time can be 1-2 weeks
Fat Boy 4 mufflers are available in a Black, Red or Blue anodized finish.
Muffler bodies, rear end caps or turndowns are available colored individually or as a complete package.
*DRI cannot guarantee colored anodized mufflers will not fade over time.


Purchase Options :

FB4-A3PCO       $129.95    3-piece package; Muffler, End Cap and Turndown
FB4-A1ECO        $24.95     End Cap ONLY
FB4-A1TDO        $24.95     Turndown ONLY
FB4-A1MFO        $89.95
     Muffler ONLY

**Custom Color prices are in addition to the regular Fat Boy 4 price

Example: 400EX Fat Boy 4 Complete Exhaust System-    $599.00

               Custom Colored 3-piece package               +    $129.95

               Total cost with color option                        =    $728.95

Custom Black
Custom Blue
Custom Red
Custom Colored End Caps
Custom Colored Mufflers
Custom Colored Turndown

440cc Kits   $299.00 - $329.00
(sleeve, piston, steel head gasket)

PC4000 Cylinder Kit

PC 4000 Power Cylinder Kits

440cc Cylinder Kit               #PC-4044      $950.00

450cc Cylinder Kit               #PC-4050      $995.00

465cc Cylinder Kit               #PC-4065       $995.00

* Bare Cylinder w/Studs     #PC-4005       $450.00

*Sold with no piston, customer must install sleeve and finish.

NOTE 1: Cylinder Kits include studs, JE forged piston kit, head gasket, base gasket (450cc & 465cc), and sleeve (installed and bored).NOTE 2: 440cc Kit is a bolt-on kit.NOTE 3: 450cc and 465cc Kits require case machining.



Vortex Ignition
w/ Modified Flywheel

Vortex Ignition (Standard)               

#VT-140S   $449.00

NOTE: Ignition curve advance limited because of stock flywheel pick up location.   Only allows limited ignition curve modification.   Moderate power gain in low to mid range.

To purchase the Vortex click here

 

Vortex Ignition (High Performance) 

DISCONTINUED
#VT-14HP   $399.00

NOTE: Requires stock flywheel pick up modification. Customer must send in flywheel to DRI for modification. Price for modification $100.00. The flywheel modification allows for maximum performance gain with the Vortex CDI. Power gain low to high range. *Modification can take 2-4 weeks to complete.

To purchase the Vortex click here

 

DRI HP4 Valve Train Kits
Kits Include: Billet Camshaft, HD Valve Springs, (4) Guides & Big Valve Kit.

DRI HP4 Valve Train Kits

HP4 Kit without DRI porting and install
 #DR-196K     $775.00

*Kit must be installed by a trained professional

 

 HP4 Kit with DRI Porting, Valve Seat Cutting and Kit Install
#DR-196KP   $1195.00

 *Customer must send DRI their stock cylinder head for modification


Replacement Head Gasket          

#BB-1440  $39.95

 

Camshafts X1-low end or X2 Mid/Topstock core required
X1
  #MC-196X1-H      $229.00
X2
  #MC-196X2-H      $229.00

X6   #MC-196X6-H      $229.00

 

8 Plate Assembly

HINSON Billet Clutch Basket (works with 7 or 8 plate)
#H056
  $230.00

To purchase the Hinson Clutch Basket click here

Inner Hub/Pressure Plate 8-Plate
Upgrade Kit
  
#H084  $515.00

To purchase the Inner Hub/Pressue Plate 8-Plate click here

 

DRI 8-Plate Fiber, Steel & Spring Kit (required for 8-plate upgrade)   

#DR-C148   $165.00

To purchase the 8-Plate Kit click here

 

DRI HD 7-Plate Kit                  
#DR-C14
   $149.00 
(works with stock inner hub & p. plate)

To purchase the HD 7-Plate Kit click here

 

Edelbrock Carburetor Kits   

$445.95 - $551.95
(Thumb or Twist) (36mm or 38mm)
See Edelbrock Carbs product section for all part numbers.

 

Chain Guards

 

Chain Guards (1999-2004) silver, red, black      

#DR14CG     $29.95

To purchase the Chain Guard click here

 

 

HD Valve Springs

Valve Spring Kits
Chromally Retainers
            #RD-268H       $137.86
Titanium Retainers              
#RD267H        $169.66
Shortened Bronze Guides    #30-3120       $19.95 ea.

 

 


Quick Change Clutch Cover Kit 
(red or black)            

Clutch Cover

#QC-14XN   $499.00
(new no core required)

K & N Filter

#HA-4099      $57.50


Outerwear

#Q-165-45T     $19.95

 

Pro Flow Kit (flange w/Uni w/wrap)

#PD-212      $99.95

(Uni replacement)

#PD-212A    $69.95

K&N Pro Flow Kit  (flange with K&N w/ outerwear)

#PD-213      $139.95

(K&N Replacement)

#PD-213A     $69.95

(Outerwear)

#PD-213C     $19.95


Carrillo Rod   

$225.00
*Plus labor to install, lower end bearing pin & thrust washer.



ENGINE SERVICES

 

Complete Engine Rebuilding         #ER-4445            $650.00

440 Disassembled

(Tear down & Reassembly)

Head Port and Valve Job              #PO-4VLV-VJ      $495.00
(includes R & R guide)

Cylinder Bore & Hone                   #MS-704S           $75.00

Valve Job                                      #MS-8004            $140.00

Cylinder Sleeve                            #MS-6000           $195.00
Install, Bore, Surface
                         

Flywheel Mod                               #MS-5000           $85.00

*ALL ENGINE SERVICE PRICES PLUS PARTS.

 

CHASSIS

LOBO II FRONT SUSPENSION KITS    

#RD-LB214F    $2995.00

Includes: Lobo A-Arms, Axis or ELKA shocks, Tie Rods, CROWN Brake Lines)
Upper & Lower A-Arms come powder coated.
For chrome plated upper arms add $150.00

Chrome Front Bumper

DR Chrome Front Bumper    

#DR-4000  $179.00

To purchase the DRI Chrome Front Bumper click here

 

IMS Aluminum Front Bumper   

#722203    $129.95


Roll Design SWINGARM
      

#DR-SW14  $1395.00
Chain slider add $90.00

 

ELKA Rear Shock Elite/ Dual Rate from  $795.00

 

AXIS Rear Shock from  $795.00

 

Roll Design Steering Shaft                  

#402203    $349.95
(Chrome, Cast Stainless Head)
(Standard [stock bars] or Extended [T2 M/C type bar] Length)


Anti-Vibe Handlebar Mount Kit

Roll STD (7/8)                 

#4766        $89.95
Roll Oversized (1 1/8)     

#4734        $89.95
        

Front Brake Line

“CROWN” Series Brake Lines (Std. or +2)                 
Front Std.                     #5400         $109.50
Front +2                        #5425         $109.50   
Rear                             #5450           $39.95
Available in: red, blue, yellow, smoke, clear                                         


AXLE Upgrade Kit
   $1995.00
(upgrades 400EX to 250R Rear End)

Includes:250R Axle, Millennium Carrier, Anti-Fade, 250R Braking Disc, 250R Rear Caliper, Rear Brake line, Alignment shim, 250R Rear Wheel Hubs

Foot Peg - Kick Up


ROLL ATV Foot Pegs
    
                 

#302203-K     $199.00

To purchase the Roll Foot Pegs click here


Skidplates         
Swingarm
     $109.95
Engine            $64.95
Chassis           $44.95

 

TEAM FIRESTICKS AXLES +3

Hub and Rotor

#TM-0201-2001         $449.00
*Uses stock OEM hubs (not included)
**TEAM has discontinued axles that use their rear wheel hub.
Replace hubs are still available in limited quantities. Call for Details
*** Starting in mid ’07 TEAM has built all of their axles to use stock OEM rear wheel hubs.


Millennium Rear Bearing Carrier  
      

#TM-930671     $249.00
Anti-Fade Axle Lock Nut

#TM-930805     $249.00

 

Billet Front Hubs (pr)                            

#DR-1FH9        $349.00
(Hub Cap colors: silver,red, black, blue)

 

Rotors Front or Rear (sold each)  
Wave Front   #DF712W         $130.00
Wave
            #DF013W        $130.00

 

BRAKING - Brake Pads (sold each caliper) -
 Front       
#703     $29.99
Rear         #686
    $29.99

Elka Front Shocks

 

ELKA Front Shocks (for stock a-arms or other brand)
Replacement Model from  $515.00
Sport Model from $790.00

See chart in Elka Suspension product section for part numbers

 

GPR STEERING STABILIZERS

GPR Low Boy V-1 ATV Stabilizers are available in Standard and Remote.                           
GPR’s Low Boy Remote includes an adjustable handlebar mounted adjuster- for adjustment on the fly. 
V-1 series offers Hi-Lo speed adjustment simultaneously. 360° of adjustment.        
Stabilizers and mount kits are made from aircraft 6061 T-6.                                                       *Standard Low Boy Stabilizers are available in Red, Blue, or Black anodizing.                                      
**Remote Stabilizers available in Black only
*Mount Kits available in Black only
           

GPR Standard Low Boy

#GPR-1400-LB   $450.00

To Purchase the GPR STD Low Boy Remote click here

STD GPR Low Boy
Dampners Color Choices

GPR Low Boy Remote

#GPR-1400-LBR   $495.00

To Purchase the GPR Low Boy Remote click here

GPR Low Boy Remoter
Low Boy Remote Handlebar Dial

 

ACCESSORIES

TAG Handlebars                                 

Oversized T2 Bars                    $94.95
Stock style X5 Bars                  $79.95


See chart in TAG Metals product section for part numbers

Motion Pro
CR Throttle and Cable (stk carb)                $41.20
Clutch Cable                                                $14.95
See chart in Motion Pro product section for part numbers

 

Billet Shifter                                       
#DR-14AS        $89.95

 

IMS 4.3 Gal. Tank  

(blue, red, natural, black, yellow)                              

#12-2227         $225.00

 

Aluminum Nerf Bars     

STD               #DR-4400           $189.95
Pro Pegs       #DR-5078            $309.95

 

Seat Bracket                                     

 #H-121                                     $59.95

 

Shrouds Bolt-On

#H-126-ADB                               $69.95

 

16T C/S Sprocket                             

#SR-CS40                                 $26.95

 

Shockwears      $59.00 set
See chart in Shockwears product section for part numbers

 

Handlebar Clamps        

#DR-10HC     $29.95

DR Billet Throttle Cover Polished
#DR-TC25X   $39.95

 

DRI/ONE 2006 Graphic-Seat Cover Kit
* 2004-2005 Kits have been discontinued

Red                             #DR- DUN4GS-RD              $129.95

Yellow                         #DR-DUN4GS6-YW            $129.95
Pink                            #DR- DUN4GS6-PK             $129.95

To purchase the DRI Graphic & Seat Cover Kit click here

 

DR Graphics & Seat Cover Kit-Red

DR Graphics & Seat Cover Kit-Yellow

 DR Graphics & Seat Cover Kit-Pink

 

2007 Rear Fender Decal Strips
"4-Stroke" Red           
      #DR-RF-D45-R           $18.95

"4-Stroke" Blue           
      #DR-RF-D45-B           $18.95

"4-Stroke" Silver/Red        #DR-RF-D45-SR         $18.95

"4-Stroke" Silver/Blue       #DR-RF-D45-SB         $18.95

To purchase the DRI Rear Fender Decals click here

          

   

    

 

 

DR Number Plates (3pc set)

** Please Note: These are the DECAL BACKGROUNDS and not the plastics
        

WHITE            #DR-850                          $24.95
BLACK            #DR-825                         $24.95
RED                #DR-840                          $24.95
BLUE              #DR-830                          $24.95

YELLOW         #DR-835                          $24.95

GREEN            #DR-827                          $24.95      
To purchase the Number Plates click here

Red
Black
White
Blue
Yellow
Green