Yamaha ATV Yamaha YFZ450 Parts and Accessories Buyers Guide

The Official Duncan Racing ATV Buyers Guide

YOUR GUIDE TO THE YAMAHA YFZ 450

ENGINE

Yamaha YFZ 450
Bolt-on Kit S-1

BOLT-ON KITS

STAGE 1 Kit (S-1)

#BK4-3450 $730.00

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

STAGE 2 Kit (S-2)

Yamaha YFZ 450
Bolt-on Kit S-2

#BK4-3450-VHP $1279.00

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

Engine Kit: Yam YFZ 460cc/470cc National Kit

#EK-345NT-46 460cc ('04-'05) $2450.00

460cc National Kit

*This engine kit uses stock valves

#EK-34NT-47 470cc ('06-'08) $2450.00

Not available online- Please call DRI to purchase

Includes: Fat Boy 4 Complete Exhaust System, 450cc/460cc/470 Forged JE Piston Kit (12-1 compression), Cylinder Bore and ReNikasil Coat, head gasket, Billet Camshaft, HD Valve Springs w/Titanium Retainers, Shortened Bronze Guides, DR Head Porting (with guides out) and Valve Seat Cut, Instructions, DR Tech Support. *Cylinder Head is returned assembled and ready to install.

Engine Kit: YAM YFZ ('04-'05) 460cc NATIONAL Kit w/Big Valves
#EK-345NT-46-B $2675.00

Not available online- Please call DRI to purchase

Engine Kit: YAM YFZ ('06-'08) 470cc NATIONAL Kit w/Big Valves

#EK-34NT-47-B $2675.00

Not available online- Please call DRI to purchase
*DRI recommends using big valves in all YFZ kits. The above mentioned kit uses plus 1 mm oversized intake and exhaust valves. After cylinder head porting, valve seats are cut with DRI's SERDI machine making oversized valves work very efficiently.

SPECIAL NOTES:

Special Note #1-DRI highly recommends using an '06-'08 crankshaft with all engine kits. "06-'07 crankshafts will bolt into '04-'05 models. '06-'08 crankshafts offer considerably more reliability to the YFZ engine. Call for additional details.

Special Note #2-DRI strongly recommends using the '07 Oiler Upgrade Kit ON ALL '04-'06 Yamaha YFZ 450 motors. Especially modified engines.

Kit Options:

YFZ OEM '07 Oiler Upgrade Kit

#DR-15431-07 $399.00

To purchase the Oiler Upgrade Kit click here

Upgrades ’04-’06 model YFZ’s oiling system to ’07. Upgraded squirter helps lubricate piston, wrist pin

and rod for increased reliability.
Recommended for all applications with stock or modified engines.

Kit includes: all necessary parts to install on running engine, including clutch cover, oil pump

and nozzle.

Kit Requires Re-Use of: water pump, impeller, water pump bearing, water pump washer,

water pump shaft, water pump cover

YFZ Oiler Kit

Squirter

Squirter installed

Camshafts:

Baja/Cross Country Cam

X34 Grind "Bottom/Midrange" Power Gain (Lift: .350/.340", Duration 250/253°)

Motocross Cam
X12 Grind "Midrange/Top End" Power Gain (Lift: .362/.353", Duration 262°)

*DRI uses billet camshafts only for the YFZ 450.
**DRI only uses this design because it is the most reliable option for this model.

Hard facing a stock oem YFZ 450 camshaft is not feasible because stock cores suffer severe distortion at the journals during the modification process.

Compression:

11-1 (Pump Gas)

12-1 (Race Fuel)

Displacement:

450cc or 460cc ('04-'05)

450cc or 470cc ('06-'08)

Cores:

Kit Price is plus any OEM parts.

Customer must send in to DRI their Cylinder(optional),Head, Crankshaft, Camshaft for modification. (or purchase new cores)

Customer must send in stock cam cores so DRI can remove IN and EX Cam

sprockets and Compression Release Mechanism and install them on new Billet Camshafts.

Customer may purchase from DRI new cylinder, head, valve cotters and camshaft cores (needed for cam sprockets) for $1,150.

*If cores are purchased new from DRI, customer will not be required to send their parts to DRI.

DRI will ship new modified and assembled head along with freshly bored and re- plated cylinder.

**If new core route is taken, customer will be responsible setting valve lash.

Delivery Schedule:

Average lead time for 460cc & 470 cc National kit is 4 to 5 weeks.

Due to heavy demand it is difficult for DRI to stock newly modified cores.

Recommended Upgrade Options for DRI National Kit

DRI Big Valve Kit

#DR-80219 $287.50
*Big Valve Kit includes (3) oversized Intake and (2) oversized stainless Exhaust Valves
**If Big Valve kit is purchased before DRI does Head Port and Valve Seat Cut there is NO additional charge to install Big Valves.

Edelbrock Carburetor Kit

Edelbrock Carburetor Kit

Edelbrock Carburetor Kit (twist) #3178 $526.95
Edelbrock Carburetor Kit (thumb) #3177 $485.95

Vortex X10 CDI

Vortex X10 CDI
#VT-3450 ('06-'08) $449.00

Upgrade clutch system to 9-Plate system (see below)

To purchase the Vortex X10 click here

Engine Kit: 495cc NATIONAL Kit *UNDER DEVELOPMENT*
#EK-345NT-49
Includes: Fat Boy 4 Complete Exhaust System, Forged Piston Kit (12-1 compression), Cylinder Bore and ReNikasil Coat, Stroker Crankshaft, head gasket, Billet Camshaft, HD Valve Springs w/Titanium Retainers, Shortened Bronze Guides, DR Head Porting (with guides out) and Valve Seat Cut, Instructions, DR Tech Support. *Cylinder Head is returned assembled and ready to install.

NOTE: DRI is currently developing this kit and is eagerly awaiting its release.

INDIVIDUAL ENGINE COMPONENTS (all items may be purchased separately)

FAT BOY 4 Complete Stainless Exhaust System
#FB4-EY3450 $599.00
*Includes FREE Jet Kit

To purchase the Fat Boy 4 click here

FAT BOY 4 HQ Complete Stainless Exhaust System
#FB4-EY3450-HQ $649.00

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

To purchase the Fat Boy 4 click here

FAT BOY 4 Exhaust System


Fat Boy 4 w/Turndown	Fat Boy 4 Silencer

Optional Fat Boy 4 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: YFZ 450 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

JE Forged Piston Kit

Piston Kits

Kit Includes: JE forged piston, pin, clips and rings.

YFZ 450, 12-1, 95.00mm, STD ('04-'05) #221796 $225.00

YFZ 450, 13.5-1, 95.00mm, STD ('04-'05) #221795 $225.00

YFZ 450, 12-1, 95.00mm, STD (''06-'08) #243296 $225.00

YFZ 450, 13.5-1, 95.00mm, STD (''06-'08) #243311 $225.00

YFZ 450, 470 Piston Kit '('06-'08) #243311 $225.00

Big Bore Kits
Kit Includes: Piston and head gasket.

*450cc Kit (12-1 or 13.5-1) (04-05) #41-4545 $275.00

*460cc Kit (11-1 or 12-1) (04-05) #41-4546 $275.00

*470cc Kit (12-1) ('06-'08) #41-4547 $275.00

*NOTE: Cylinder must be stripped, bored and re-nikasiled at an additional cost.

DRI offers this service for $295.00.

Replacement 450cc Piston (12-1) #230035 $225.00

Replacement 450cc Piston (13.5-1) #232200 $225.00

Replacement 460cc Piston (11-1) #230854 $225.00

Replacement 460cc Piston (12-1) #231848 $225.00

Replacement 470cc Piston (12-1) #243310 $225.00

Replacement Head gasket #5TA-97 $49.50

DRI HP4 Valve Train Kits
Kits Include: Billet Camshaft, HD Valve Springs with Titanium Retainers, Big Valve Kit (3-intake/2-exhaust), (5) Shortened Guides

DRI HP4 Valve Train Kits

HP4 Kit without DRI Porting and Install
#DR-289K $1050.00
*Kit must be installed by a trained professional

HP4 Kit with DRI Porting, Valve Seat Cutting and Kit Install

DRI HP4 Valve Train Kit with Porting

#DR-289KP $1550.00

*Customer must send DRI their stock cylinder head for modification

Camshafts

X12 Grind Camshaft

#289-X12 $459.00

(Midrange/Top End Cam, includes IN & EX Cams, Lift: .362/.353", Duration 262°)

X34 Grind Camshaft

#289-X34 $459.00

(Bottom/Midrange Cam, includes IN & EX Cams, Lift: .350/.340", Duration 250/253°)

*Both X12 and X34 Cams are hard faced on billet cores. These billet cores must use the camsprockets off the stock cams. DRI has manufactured precision tooling to ensure these sprockets are installed properly. When purchasing cams, send in stock cams. Sprockets are installed for $50.00.

**All racing camshafts must use HD valve springs.

Titanium Valve Kits

HD Valve Spring

Valve Spring Kits HD Valve Springs & Titanium Retainers
#80-206 $245.50

Big Valve Kits

Oversized Stainless Steel Valve Kit

#DR-80214 $287.50

Kit includes 5-piece set + 1.0mm

Oversized Stainless Steel Intake & Exhaust Valves

NOTE: Oversized Valves must be installed by a professional
with the proper equipmen. Failure to install correctly will result in either engine damage or performance loss.

For maximum performance it is best to cut valve seats with SERDI type machine.

Oversized Titanium Valve Kit

#DR-80214T $675.00
Kit includes 5-piece set + 1.0mm

Oversized Titanium Intake & Exhaust Valves

NOTE: Oversized Valves must be installed by a professional
with the proper equipmen. Failure to install correctly will result in either engine damage or performance loss.

For maximum performance it is best to cut valve seats with SERDI type machine.

Shortened Bronze Guides

Shortened Bronze Guides
Intake #80-80220 $19.95 each

Exhaust #80-80230 $19.95 each

Edelbrock Carburetor Kits

Edelbrock Carburetor Kit

Edelbrock Carburetor Kit (twist) #3178 $485.95
Edelbrock Carburetor Kit (thumb) #3177 $526.95

Vortex X10 CDI

Vortex X10 CDI

#VT-3450 $399.00

To purchase the Vortex X10 click here

Knife Forged Connecting Rods $199.00

Knife Connecting Rod

Features an aerodynamic oval beam design that resists twisting and reduces turbulence. Knife rods are specifically designed to withstand the demands of high RPM, performance modified, press-together cranks.

*$100.00 Labor charge to install.

**New pin and bearings required at additional cost.

Crankshaft Services

HD Crankshaft

HD Crankshaft Rebuild $399.00

Includes new Knife Forged Rod, Pin and Bearing.

*Customer must send in stock crankshaft for modification.

New HD Crankshaft $675.00

Includes new OEM Crankshaft and Knife Forged Rod

* Note 2006 crankshafts will bolt into 04-05 motors

Pro Flow Air Filter Kits
#PD-215 $169.95

(Billet A/C Flange, K&N Filter, Outerwear)

To purchase the Pro Flow Air Filter Kit click here

#PD-216 $129.95

(Billet A/C Flange, Uni Foam Filter)

To purchase the Pro Flow w/Uni Air Filter Kit click here

Pro Flow Air Filter Kit

Pro Flow Kit Installed

Quick Change Clutch Cover (new no core required - red, blue or black anodized)
#QC-345N $200.00

To purchase the Quick Change Cover click here

Black Quick Change Cover

Blue Quick Change Cover

NOT PICTURED

Red Quick Change Cover

HINSON Billet Clutch Basket

#H-213 $230.00

To purchase the Clutch Basket click here

HINSON Billet Inner Clutch

#H-198 $299.00

HINSON Billet Pressure Plate (8-plate only)

#H-212 $175.00

Hinson Billet Clutch Basket

Hinson Billet Inner Clutch

YFZ 450 9-Plate Kit

HINSON 9-Plate Kit

#H-214 $395.00
* Includes 9-Plate Pressure Plate & 9-Plate Clutch Kit Fibers, Steels & Spring Kit
**Note: The YFZ 450 comes stock with 8-Plate clutch. Part numbers #H-213 and #H-198 work with both 8 and 9 plate set ups. But part number #H-212 only works with stock 8-Plate design.

DR HD Clutch Kit

#DR-C34 $179.00
(Fiber, Steel & HD Spring Kit)

To purchase the Clutch Kit click here

ENGINE SERVICES

Complete Engine Rebuilding

#ER-4445 $650.00
(Tear down & Reassembly)

Head Port and Valve Seat Cutting

#PO-5VLV-VJ $550.00
(includes R & R guide)
*DRI 4-Stroke head are refined with in house flow bench testing and valve seats are cut with Serdi Valve Seat Machine for the absolute best quality head work available in the entire industry

3-Angle Valve Job (5-Valve)

#MS-8005 $175.00

*ALL ENGINE SERVICE PRICES PLUS PARTS.

CHASSIS

LOBO II FRONT SUSPENSION KITS

#RD-LB234F $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

* Text Black Finish available at an additional charge

Lobo II Front Suspension Kit

Lobo II Front Suspension- Side View

Lobo II Front Suspension- Text Black Finish

Roll Design SWINGARM (Bent)
Standard Finish is Silver- All other finishes available for an additional charge

#RD-SW36 $1295.00
Chain slider add $90.00

*Must use round housing rear carrier. Must be purchased at additional cost

* Text Black Finish or Chrome Finish available at an additional charge

ROLL Swingarm-Chrome Finish

Roll Swingarm - Text Black Finish

Roll Design Steering Shaft

Roll Design Steering Shaft

#407306 $349.95
#407307 ('06-'08 yf2) $349.95

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

Anti-Vibe Handlebar Mount Kit $89.95
(std 7/8 or oversized 11/8)

DR Chrome Front Bumper

#DR-3450 $179.00

* Text Black Finish available by special order only- Please call DRI to order

To purchase the DRI Chrome Front Bumper click here

DR Chrome Bumper

Text Black Finish

IMS Aluminum Bumper

IMS Aluminum Front Bumper
#722306 $129.95

"CROWN" Series Brake Lines (std or +2")
Front    #CR-5500 (std)         $109.50
Color Options: Red, Blue, Yellow, Smoke, Clear, Green
Front    #CR-5525 (+2")        $109.50
Rear    #CR-5550                 $39.95

Roll ATV Foot Pegs

ROLL ATV Foot Pegs

#307306-K $199.00

To purchase the Roll Foot Pegs click here

Team Axle and Rear Hub

TEAM FIRESTICKS AXLES +3
#TM-0201-2105 $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.

Rear Bearing Carrier $269.00
Carriers are available for use with either Stock YFZ or Honda TRX 250R rear axle

Stainless Axle Nut
#DR-AN36 $99.95

Billet Front Hub

Billet Front Hubs (pr.)

#DR-3FH6 $399.00
(Hub Cap colors: silver, red, black, blue)

SKIDPLATES
Swing arm #04-2825 $89.95
Engine #04-3825 $89.95

Rotors
Front WAVE   #DF477W               $130.00
Rear WAVE    #DF478W               $130.00



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

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-3450-LB $450.00

To Purchase the GPR STD Low Boy Remote click here