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The Official Duncan Racing ATV Buyers Guide


YOUR GUIDE TO THE YAMAHA WARRIOR 350

ENGINE

S-1 Bolt-On Kit

BOLT-ON KIT

STAGE 1 Kit (S-1) 

#BK4-3500     $597.00

Includes:
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 S-1 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

 

National Engine Kit

DRI  NATIONAL Engine Kit                        
 #EK-3WNT 
    $1250.00

Not available online- Please call DRI to purchase

Includes:

Fat Boy 4 Complete Stainless Exhaust, Camshaft, HD Valve Springs w/chromally retainers, 38mm PE Carburetor Kit (thumb or twist), Jet Kit,  Piston Kit, DRI Porting & Valve Job, Pro Flow Air Cleaner Flange, K&N Filter, Outerwear

·  Price plus any necessary machining and or parts. Example: Boring, Gaskets, Guide Seals, etc.  are additional cost

Cores Required: Cylinder, Head with rocker arms, camshaft

Power Gain: 30-40%

Optional Upgrades:

Valve Spring Kit w/Titanium Retainers        

#RD-121Y      $102.88


Piston Kit 12-1 compression    call for price


Edelbrock Carburetor Kits                                                              

Thumb        #EB-3011      $445.95

Twist           #EB-3150      $445.95


INDIVIDUAL ENGINE COMPONENTS (all items maybe purchased separately)

 

Fat Boy 4 Exhaust

Fat Boy 4 Complete Stainless Exhaust System

* No HQ muffler available

#FB4-EY3500           $499.00

To purchase the Fat Boy 4 click here

 

Optional Fat Boy 4 Accessories: 

Fat Boy 4 Turndown

#FB4-4A250       $39.95    Turndown  
#06-554              $17.95    Spark Arrestor

Notes:

1. Turndown bolts on rear end cap, o-ring seal.
To use spark arrestor turn down is required.

2. Rejetting is required, with installation of Fat Boy 4.

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: Warrior Fat Boy 4 Complete Exhaust System-     $499.00

               Custom Colored 3-piece package                  +    $129.95

               Total cost with color option                           =    $628.95

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


PISTONS

Warrior Piston


Wiseco forged 10.25-1                 #4419           $125.00      

Sizes: Std, 2nd, 4th, 6th, 8th      
                         

Warrior Piston 12-1, 83.00mm     #209291         $225.00


The Following Pistons Require Cylinder Bore
Warrior Piston
10.5-1, 85.00mm  #222085         $225.00
Warrior Piston
12-1, 85.00mm     #209292         $225.00
          

DRI HP4 Valve Train Kits

Kits include: Billet Camshaft, HD Valve Spring Kit and Big Valve Kit.

HP4 kits are available installed with DRI Head Porting or without install.

WARNING!  HP4 kits not installed by DRI must be installed by a trained profession with proper equipment.

DRI HP4 Kit Without DRI Porting and Install                                     

#DR-252K       $ 419.00

Includes Billet Camshaft ,HD Valve Spring Kit, and Big Valve Kit.

To purchase the HP 4 click here

 

DRI HP4 Kit With DRI Porting, Valve Seat Cut and Install                  

#DR-252KP     $ 770.00

Includes Head Porting, Valve seat cut, Billet Camshaft, HD Valve Spring Kit, Big Valve Kit and installation .

*Customer must send in head to DRI for Port Modification

To purchase the HP 4 click here

Warrior HP4 Kit
Warrior HP4 Kit

 

Camshafts  Hardfaced Camshafts Customer must send in Stock Cam Core to DRI

X1H Grind           #252-X1H              $149.00

Midrange and Top End Power Gain.  (Lift .450”, Duration 276)

X2H Grind           #252-X2H              $149.00

All Around   (Lift .415”/395”, Duration 246/245)

DRI also offers the above Camshafts in Billet (No Cam Core Required)   $219.00

 

DRI Big Valve Kit   

# DR-80013   $57.50

*Big Valve Kit includes (1) oversized Intake Valve. No oversized EX valve is available

**If Big Valve kit is purchased before DRI does Head Port and Valve Seat Cut there is NO additional charge to install Big Valves.

*** If DRI has previously ported head, there is a $75.00 machining charge to install big valve.    

  

Valve Springs w/Titanium Retainers             

#80-8000    $102.88

Shortened Bronze Guides                  

Intake & Exhaust                                  

#80-8010    $19.95 each

 

 

Keihin Carburetor


CARBURETOR KITS

Keihin 38mm PE Carb Kit  (thumb or twist)    
#K-CR38E-Y   $229.00
Includes; Carb, manifold adaptor, twist throttle & cable or cable to work
with stock thumb throttle.
Must use Pro Flow Flange & Filter


 

Edelbrock Carburetor

Edelbrock Carburetor Kit  
Twist Throttle          #EB-3150
                  $445.95
C
able for Thumb     #EB-3011                  $445.95

 




Pro Flow Air Cleaner Kit   
(Billet Flange, K &N, Outerwear) 

#PD-204       $129.95

To purchase the Air Cleaner Kit click here


   

Pro Flow Air Cleaner

Pro Flow Air Cleaner Kit  (Billet Flange, Foam)  
#PD-3WUN       $99.95

To purchase the Air Cleaner Kit click here

      

 

 


CLUTCH COMPONENTS

DR Clutch Kit   (fibers,steels,springs)                       

#DR-C35W      $139.00

To purchase the Clutch Kit click here

 


ENGINE SERVICES

DRI Porting & 3-Angle Valve Job               #PO-2VLV-VJ              $395.00
Labor price only, plus any parts required (valves, guides, seals etc.)
Must send head into DRI for modification
DRI removes guides when performing porting process

Complete Engine Rebuilding                         #ER-4445                       $650.00
(Teardown &
Reassembly

Cylinder Bore and Hone                            #MS-704S                      $75.00

Valve Job                                                       #MS-8002                      $100.00
(2-Valve) 

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

Crankshaft Rebuild                                    #MS-9011                       $125.00

Flywheel Modification                               #MS-5000                        $85.00

·        ALL ENGINE SERVICE PRICES ARE PLUS ANY ADDITIONAL PARTS REQUIRED



CHASSIS

DR Chrome Front Bumper

DR Chrome Front Bumper (’89-’03)
#DR-3W00 
             $179.00

To purchase the Chrome Front Bumper click here

 

 



ELKA Shocks 

ELKA Shocks

Replacement Model   Front pair without reservoirs                   from $515.00
Sport Model              Front pair with reservoirs                         
from $715.00
Sport Model              Rear  with reservoir                                 
from $745.00

·        Call DRI for specific application needs and
      part numbers regarding Elka shocks

 

 

Skidplates               
Engine Skidplate                               #Y-206                              $44.95
Swingarm Skidplate                          #Y-209                              $79.95
Chassis Skidplate                               #Y-210                              $59.95

 

Chain Slider                                      #CS-3802                          $39.95
 (blue, red, black, yellow, white, purple) 

Rotors
Front           #
DF-477W                         $130.00
Rear          #
DF-478W                          $130.00

 

Braking Brake Pads    
Front (89-03)                                        #703                                 $29.99
Rear (89-03)                                         #686                                 $29.99


ACCESSORIES

 

IMS Fuel Tanks  3.8 Gallon (white, blue or natural)                                        
#12-7312                          $274.95


TAG Handlebars                                

Oversized T2 Bars                    $94.95
Stock Style X5 Bars                  $79.95


See TAG METALS  in ATV PRODUCT  section for Complete application Chart.

 

Motion Pro   Twist Throttle Kit for stock carburetors

CR Throttle & Cable Kit   (88-92)                #01-342                             $38.95
CR Throttle & Cable Kit   (93-03)                #01-359                             $42.70
Cable: Terminator Clutch                          #05-117                             $22.95
Cable; CR Throttle  to stock carb               #01-404                             $20.50
Cable; Thumb to 38mm PE                        #X-231                              $18.95
Cable; CR Throttle to 38mm PE                 #X-232                              $18.94

 


Pro Design Cut-Off Switch   (red, blue, white, black, yellow)                       

 #PD-5000      $34.95


SHOCKWEARS   (Available for all shocks)    $
59.00 set

 

ALUMINUM NERF BARS & GRAB BAR

Nerf Bars                               #DR-335W      $189.95
Grab Bar                               #GB-335W        $5
9.95

 


Throttle Cover         

#DR-TC3W      $39.95
Polished Billet Aluminum 



Block Off Plate     

#DR-PB13       $14.95
(red, blue, silver)

 

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 Rear Fender Decal 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