WR400/426/450 Modification Database

WR 400 2001 model Australian version

Engne: std Brass fuel screw lengthened with a tbar on the end. JD Jet kit blue needle 2nd clip 170 main jet std pilot jet BK Mod

Exhaust: GYTR tail pile stock headder

Fluids: Thumper 20w40

Suspension : Std but need stiffer springs im fat 95kg

Chasis: scott grips aftermarket wider pegs bar raisers and RC high renthal bars

Protection: B & B skid plate bark busters

Tyres & Wheels: Stock rims but brigy ned terrain MX tyres

Drive: std 14 50

Elect:L Std

Cosmetics: on industries sticker kit all over

Comments : BK mod was the best and she is now jetted and running like a dream no bog and no hesitation jus clean start to finnish of the rev range.. She chews tyres in 2 rides though now as it has its full potential .. Button would be nice but not necessary..:thumbsup:

Model/Year: 2002 WR426F

Engine: NGK iridium spark plug

Carb: 2004 YZ450F carb with Boyesen AP cover, Zip Ty fuel mix screw, both PowerNow inserts

Exhaust: FMF Power Bomb header, DRD slip on silencer

Fluids: 20W50 oil, 50/50 coolant, DOT4 brake fluid

Suspension: OEM

Chassis: ASV levers, Renthal 7/8” bars, DRD hot start lever (throttle side), Cycra Pro Bend (triple clamp) hand guards, Scott med compound grips,

Protection: MSR radiator braces, Works Connection frame guards

Tires/Wheels: Titax 280mm front rotor

Driveline: White Brothers sprockets (14T front, 50T rear), DID 520 o-ring chain

Electrical: 1.3 Ah SLA battery, Baja Designs regulator rectifier and LED tail light/license mount, Trail Tech Vapor computer

Cosmetic: black plastic, no graphics

Miscellaneous: all free mods, suspension set up

Comments: The free mods, carb update and exhaust completely changed the nature of this bike. I also have a 2002 YZ426F and the WR does everything better than the YZ, except triples and loading into the truck (it’s heavier).

Model/Year: 2007 WR450

Engine: AIS removed, UNI filter,Airbox top stuffed with coarse foam, Scotts stainless oil filter, Boyesen super cooler water pump, 1.6 Rad cap

Carb:F2 fastcap, rejetted, Fuel screw

Exhaust: 08 YZ full system, PMB endo and silent insert

Suspension: Eibach springs front 0.48 and rear 5.4

Protection: Scorpion Skid Plate, Acerbis Bark Busters, WC rear calliper guard, Devol rear disc guard and Flatland front, Unabiker Rad guards, GYTR CS sprocket cover and timing plugs

Tires/Wheels: Washougal Sticky front and rear

Driveline: Ironman sprockets 13/52, Regina Z ring chain, TM designs chain guide

Chassis: ARC C-5 shorty clutch and brake lever, GYTR thumb hot start, Tusk axle blocks, Tusk 1.5" bar raisers, Spider SLX grips, YZ left foot peg mount ( kickstand removed )

Electrical: Ebatt NiCad to stock charging system

Cosmetic: Metal Mulisha graphics and 2" soft foam added to stock seat

Miscellaneous: IMS 3.1 gal tank, YZ shrouds, 06 petcock

Comments: She's just about perfect. No hesitation, smooth and strong from bottom to top. Suspension works well for the woods and decent enough for the track . My bike is plated and I race it in the Senior A class of our BC offroad series. Just a couple more mods in mind

Model/Year: WR 450 2003 (US Model)

Engine: 478 Big Bore, YZ Exhaust Cam, Fluidyne over size Rads,TM Design Front sprocket guard.

Carb: JD KIt, ZipTy Fuel screw, YZ throttle stop, Deep sump.

Exhaust: Powerbomb header, DEP Enduro silencer.

Fluids: Putoline Off Road 4+ oil, coolant, brake fluid.

Suspension: K-Tech full revalve and springs front and rear.

Chassis: Pro Taper Pastrana, Renthal Grips, RTT Steering Stabiliser (welded on post, re-powdercoated frame), Pivot Pegz.

Protection: Utah Skid Plate, Acerbis bend bark busters, Carbon pipe guard, Moose rear caliper/disc shark fin.

Tires/Wheels: Talon gold hubs, Exel black rims, Stainless spokes.

Driveline: DID X-Ring chain, standard front sprocket, Renthal twinring rear.

Electrical: Garmin GPS.

Cosmetic: Guts tall foam and cover.

Miscellaneous: Rekluse, Left hand rear brake, Modified airbox, Grey wire, 04 Starter upgrade, Solid rear disc, Rekluse Hot Start.

Comments: This bike takes the P**S......I love it !!!!

Model/Year:WR450F 2008

Engine: StockCams, Stock plugs, No-Toil Air filter, GYTR AIS kit

Carb: YZ throttle stop from GYTR AIS kit, stock jetting

Exhaust: Stock but with pea shooter removed

Fluids: (Bell Semi-Synth 20w50 racing oil, Preston coolant, Yamaha DOT4

Suspension: Turn rear spring down 8 turns tightened up damping and rebound 2 turns on all setttings

Chassis: Stock

Protection: D-Flex Bark Busters, Works Connection rear master cylinder guard

Tires/Wheels: Excel Rims, MSR HD Tubes

Driveline: 50 spoke blue rear sprockets, Stock 14 tooth front, stock Chain

Electrical: Stock Yamaha trip Computer, grey wire mod

Cosmetic: All Stock

Miscellaneous:

Comments:Have performed all free mods including the above mentioned and air-box restrictor plate removal

Model/Year:2008 WR450F

Engine: AIS removed

Carb: Jetted properly

Exhaust: Stock

Fluids: Stock

Suspension: ASR4

Chassis:Clarke 3.4 tank

Protection: Flatland skid plate and radiator guards, EE rear disc guard, Cycra CRM's

Tires/Wheels: Tubliss front and rear, Motoz Tracula tires

Driveline: Revloc clutch

Electrical: Garmin GPS, Pro-Comp 3, dual sport kit,

Cosmetic: Custom graphics

Miscellaneous:Street legal, Wolfman bags

Comments:

Model/Year: WR450F / 2009

Engine: (Cams, plugs, Filters, AIS kit, etc.)

Stock, stock, No Toil Super-Flo Air Filter Kit, Gray wire & throttle screw mods

Carb: (Quickshot, Fuel Screw, Jetting Kit, Modifications, Replacement, etc.)

No, No, FMF Jet Kit, no other mods

Exhaust: (Can, Header, Mid-pipe, Modifications, etc.)

FMF Q4 S/A pipe, FMF Titanium megabomb header

Fluids: (Oil, Coolant, Brake Fluid)

Stock now - will change coolant to water wetter, oil to motul synthetic, but leave stock break fluid after break in

Suspension: (Springs, Fluids, Modifications, Replacements, etc.)

Full SPI WR Phase 4 Kit with KYB springs tuned to my weight and riding style

Chassis: (Bars, Grips, Triple Clamps, Levers, Pegs, Brakes, Lines,

Modifications, etc.)

all stock

Protection: (Skid Plate, Bark Busters, Pipe Guard, Caliper/Rotor Guards, etc.)

Ricochet aluminum skid plate, Acerbis Rally Pro I hand guards (YZ Blue)

Tires/Wheels: (Rims, Spokes, Hubs, Tubes, Axles, etc.)

stock

Driveline: (Sprockets, Chain)

all stock

Electrical: (GPS, Computers, Dual-Sport Kits, etc.)

all stock

Cosmetic: (Graphics, Plastic, Seat Covers, etc.)

all stock

Miscellaneous:

Tusk Billet Aluminum Gas Cap Blue

Comments:

so far so good, i may add a larger gas tank and the yz radiator scoops after i get a feel for the stock range of the bike.

Update

Model/Year: 2007 WR450

Engine: 08 YZ cams, JE 13.5-1 piston,AIS removed, UNI filter,Airbox opened and modded and top stuffed with coarse foam, Scotts stainless oil filter, Boyesen super cooler water pump, 1.6 Rad cap

Clutch: GYTR inner, outer hub, cover and pressure plate

Carb:F2 fastcap, rejetted, Flexjet Fuel screw

Exhaust: 08 YZ full system, PMB endo and silent insert

Suspension:Smart performance Phase 4 kit forks, revalved rear, Eibach springs front 0.48 and stock YZ Ti rear 5.5

Protection: Scorpion Skid Plate, Acerbis Bark Busters, WC rear calliper guard, Devol rear disc guard and Flatland front, Unabiker Rad guards, GYTR CS sprocket cover and timing plugs

Tires/Wheels: Washougal Sticky front and rear

Driveline: Aluminum rear sprocket 13/51, GYTR X-ring chain, TM designs chain guide, TM designs chain slider

Chassis: ARC C-5 shorty clutch and brake lever, GYTR thumb hot start, Tusk axle blocks, Tusk 1.5" bar raisers, Spider SLX grips, YZ left foot peg mount ( kickstand removed ), Moose titanium pegs, Stainless steel front brake line

Electrical: Ebatt Lithium to stock charging system

Cosmetic: Metal Mulisha graphics and 2" soft foam added to stock seat

Miscellaneous: IMS 3.1 gal tank, YZ shrouds, 06 petcock

Comments: The 08 YZ cams and HC piston are a perfect combo for smooth power with lots of pull. GYTR clutch is a thing of beauty as well as the Smart Performance modded suspension.It's a woods weapon!!

Edited by tribalbc
add
Model/Year: WR450F / 2009

Engine: (Cams, plugs, Filters, AIS kit, etc.)

Stock, stock, No Toil Super-Flo Air Filter Kit, Gray wire & throttle screw mods

Carb: (Quickshot, Fuel Screw, Jetting Kit, Modifications, Replacement, etc.)

No, No, FMF Jet Kit, no other mods

Exhaust: (Can, Header, Mid-pipe, Modifications, etc.)

FMF Q4 S/A pipe, FMF Titanium megabomb header

Fluids: (Oil, Coolant, Brake Fluid)

Stock now - will change coolant to water wetter, oil to motul synthetic, but leave stock break fluid after break in

Suspension: (Springs, Fluids, Modifications, Replacements, etc.)

Full SPI WR Phase 4 Kit with KYB springs tuned to my weight and riding style

Chassis: (Bars, Grips, Triple Clamps, Levers, Pegs, Brakes, Lines,

Modifications, etc.)

all stock

Protection: (Skid Plate, Bark Busters, Pipe Guard, Caliper/Rotor Guards, etc.)

Ricochet aluminum skid plate, Acerbis Rally Pro I hand guards (YZ Blue)

Tires/Wheels: (Rims, Spokes, Hubs, Tubes, Axles, etc.)

stock

Driveline: (Sprockets, Chain)

all stock

Electrical: (GPS, Computers, Dual-Sport Kits, etc.)

all stock

Cosmetic: (Graphics, Plastic, Seat Covers, etc.)

all stock

Miscellaneous:

Tusk Billet Aluminum Gas Cap Blue

Comments:

so far so good, i may add a larger gas tank and the yz radiator scoops after i get a feel for the stock range of the bike.

added

- works connection rear caliper guard + rear master reservoir cylinder guard

- oil to motul semi syn + water wetter for radiator fluid

- tm designs chain slider

pending

- works connection fuel screw, not installed yet

- hyde racing frame guards ordered, not installed yet (probably going to return)

Edited by drick
added

- works connection rear caliper guard + rear master reservoir cylinder guard

- oil to motul semi syn + water wetter for radiator fluid

- tm designs chain slider

pending

- works connection fuel screw, not installed yet

- hyde racing frame guards ordered, not installed yet (probably going to return)

old pending from above now completed

installed WC fuel mixture screw

returned hyde frame guards, what a PITA

new items not listed previously now installed

-51T TAG aluminum rear sprocket

-Galfer stainless steel brake lines (F&R)

-T.M. Designworks Chain Slider

-T.M. Designworks Factory Edition 1 Rear Chain Guide

-Works Connection Radiator Guard

-Works Connection oil fill plug

pending

-GYTR AIS removal kit

-GYTR rear brake clevis

-GYTR brake line pinch

-Boyesen supercooler kit

-BarnumsPro clean air induction kit

-ASV F3 Brake lever

-ASV F3 Pro clutch w HS

-Works Connection Rear Brake Reservoir Cap Blue

under consideration

-IMS 3.1 gallon tank

-YZ shrouds to go with it

-Scotts stainless steel oil filter

-new triple clamp kit, struggling to find one i like (i want the ProTaper 4.3 but they don't fit a WR)

-steering stabilizer

Edited by drick

2001 WR 426

Engine: (Cams, plugs, Filters, AIS kit, etc.)

YZ 450 hot cams

K&N Filter

Carb: (Quickshot, Fuel Screw, Jetting Kit, Modifications, Replacement, etc.)

JD Jet kit - 170, Zypco Fuel Screw, Snorkel out

Excel supermoto wheels

Signals/plate CA

2011 WR450F:

Engine: Twin Air Filter

Carb:

Exhaust: Pea shooter removed, and also 1 baffle

Fluids: yamalube

Suspension: Fork Bleeders

Chassis:

Protection: Bark busters

Tires/Wheels:

Driveline: 13t/ 47t

Electrical:

Cosmetic:

Miscellaneous:

2008/Wr450:

Engine: Stock

Carb: Stock w/ Throttle Stop Mod and Air Box Mod

Exhaust: Stock w/o Pea Shooter

Fluids: IMS 3.2 gal Tank, Mobil 1 synthetic oil

Suspension: Still stock (need to do somthing about that for my 225lb ass)

Chassis: Scotts Stabilizer Under bar w/risers, Power Pegz

Protection: Acerbis Brush/Hand gaurds

Tires/Wheels:Cheng Shin Trials tire(Bought the cheap one to see if I like a Trials Tire)

Driveline: Stock

Electrical: Grey Wire mod, Battery Tender

Cosmetic: Nothing Special

Miscellaneous:

Comments: I LOVE THIS MOTORCYCLE!

Model-2005 WR 450

Engine:YZ EXHAUST CAM-AIS REMOVED-HEAVILY MODIFIED OEM AIRBOX WITH AFTERMKT FOAM

Carb: BIGGER PILOT-MAIN JET.QUICK ADJUST AIR NEEDLE-BOYESEN AIR DIAPHRAM COVER- "OBDVR" NEEDLE IN 4TH CLIP BIG BIG IMPROVEMENT!

Exhaust: YZ 450 TITANIUM HEADPIPE AND MUFFLER THAT IS SHORTENED 1 1/2"

Fluids:SYN BRAKE FLUIDS-CHEEP OIL CHANGED EVERY 2 RIDES...!

Suspension: DEWAYANE JONES REAR SHOCK MODIFIED WITH TITANIUM SPRING. FACTORY SUZUKI SHOWA FORKS IN MODIFIED OEM TREES [sORRY GUYS!]

Chassis: CR TALL DESERT BARS-MS WIDE PEGS-OEM SEAT WITH EXTRA SOFT/TALL FOAM AND NEW COVER-FOLDING LEVERS-IMS 3.2 BLUE PLASTIC TANK-ACERBIS YZ BLUE SIDE PANELS

Protection: SHOWA CARBON FIBER FORK AND ROTOR GUARDS-CARBON FIBER SPROKET AND RR CALIPER GUARDS-BARK BUSTERS-BANZI FRONT HEAD PIPE PROTECTER-DEVOL RAD GUARD-DEVOL SKID PLATE

Tires/Wheels: OEM REAR WHEEL-DRZ 400 FRONT WHEEL WITH ODO DRIVE UNIT-TUBLESS TUBES-IVE TRIED ABOUT EVERY DIFFERENT TIRE COMBONATION...

Driveline: 15/48T SPROKETS [ALUMINUM REAR] TSUBAKI "O"-RING CHAIN

Electrical:NO GREY WIRE- SELF-INSTALLED / MADE DUAL SPORT KIT-ACERBIS LED REAR TAILITE/LICENSE COMBO-"HOT" GRIPS INSTALLED-OUTLET FOR ELECTRIC AIR PUMP

Cosmetic: ALL BLUE PLASTICS AND CUSTOM MADE BLUE/BLACK "GRIPPER" SEAT COVER

Miscellaneous: LOTS OF SMALL MISC ANADIZED BOLTS-HARDWARE

Comments: WHAT A GREAT BIKE! ALMOST 10,000 MILES OF DUAL-SPORT RIDING AND STILL RUNS AND HANDLES FANTASTIC.:excuseme:

Model-2005 WR 450

Engine:YZ EXHAUST CAM-AIS REMOVED-HEAVILY MODIFIED OEM AIRBOX WITH AFTERMKT FOAM

Carb: BIGGER PILOT-MAIN JET.QUICK ADJUST AIR NEEDLE-BOYESEN AIR DIAPHRAM COVER- "OBDVR" NEEDLE IN 4TH CLIP BIG BIG IMPROVEMENT!

Exhaust: YZ 450 TITANIUM HEADPIPE AND MUFFLER THAT IS SHORTENED 1 1/2"

Fluids:SYN BRAKE FLUIDS-CHEEP OIL CHANGED EVERY 2 RIDES...!

Suspension: DEWAYANE JONES REAR SHOCK MODIFIED WITH TITANIUM SPRING. FACTORY SUZUKI SHOWA FORKS IN MODIFIED OEM TREES [sORRY GUYS!]

Chassis: CR TALL DESERT BARS-MS WIDE PEGS-OEM SEAT WITH EXTRA SOFT/TALL FOAM AND NEW COVER-FOLDING LEVERS-IMS 3.2 BLUE PLASTIC TANK-ACERBIS YZ BLUE SIDE PANELS

Protection: SHOWA CARBON FIBER FORK AND ROTOR GUARDS-CARBON FIBER SPROKET AND RR CALIPER GUARDS-BARK BUSTERS-BANZI FRONT HEAD PIPE PROTECTER-DEVOL RAD GUARD-DEVOL SKID PLATE

Tires/Wheels: OEM REAR WHEEL-DRZ 400 FRONT WHEEL WITH ODO DRIVE UNIT-TUBLESS TUBES-IVE TRIED ABOUT EVERY DIFFERENT TIRE COMBONATION...

Driveline: 15/48T SPROKETS [ALUMINUM REAR] TSUBAKI "O"-RING CHAIN

Electrical:NO GREY WIRE- SELF-INSTALLED / MADE DUAL SPORT KIT-ACERBIS LED REAR TAILITE/LICENSE COMBO-"HOT" GRIPS INSTALLED-OUTLET FOR ELECTRIC AIR PUMP

Cosmetic: ALL BLUE PLASTICS AND CUSTOM MADE BLUE/BLACK "GRIPPER" SEAT COVER

Miscellaneous: LOTS OF SMALL MISC ANADIZED BOLTS-HARDWARE

Comments: WHAT A GREAT BIKE! ALMOST 10,000 MILES OF DUAL-SPORT RIDING AND STILL RUNS AND HANDLES FANTASTIC.:excuseme:

Model/Year: 2004 WR450F

Engine: Wiseco piston kit, airbox snorkel removed, engine vent hose re-routed

Carb: 2006 YZ450 carby (rejetted to suit with hoses T'd and re-routed)

Exhaust: FMF power-bomb header, FMF Ti4 muffler with Quiet Core insert

Fluids: Silkolene Comp 4T engine oil

Suspension: 2007 YZ450 forks, 2008 YZ450 shock

Chassis: Tag T2 tapered bars, Renthal top triple clamp, 2007 WR bottom clamp, HEL performance stainless brake line

Protection: B&B alloy bash plate, B&B frame guards, Bark Busters, Devol radiator guards

Tires/Wheels: Standard wheels, Bridgestone M403/M404 tyres

Driveline: Renthal chain & sprockets 14/52

Electrical: Standard with MotoBatt battery

Cosmetic: Factory Effex EVO6 graphics, late-model headlight, YZ style rear guard with LED light

Miscellaneous: Speedo drive eliminator, modified chain slider

Comments: A very strong, linear power delivery - great fun to ride!

Edited by pdunlop

Hi. I've got a 2005 Wr 450 with an FMF megabomb header, and a HMF pipe. I just tried to have a quickshot 3 device installed and it keeps leaking from the needle. This is the second one, and same thing! I have an extra part left over from both installs and can't figure where it could go. Looks like a medal straw. Any advice? Also, the bike feels slower with this on after I had the jet changed.

I just bought a leftover 09wr450 and am really excited about the possibilities of this machine. I am looking for some tips and advice from some fellow 4-strokers on how to make this thing really sing..

I just bought a leftover 09wr450 and am really excited about the possibilities of this machine. I am looking for some tips and advice from some fellow 4-strokers on how to make this thing really sing..

Look in the sticky's for the NEWBIE SURVIVAL GUIDE!

Long overdue for an update. May not ride the WR much anymore but she sure runs strong. A low end torque monster.

Model/Year: 2007 WR450

Engine: Flow ported head, YZ intake cam, WR exhaust cam, JE 13.5:1 piston, full GYTR clutch, AIS removed, Uni filter

Carb: R&D fuel screw, 175 main, GYTR needle 4th clip, 48 pilot

Exhaust: Jardine RT-5 full system

Suspension: Smart performance Phase 4 kit forks, revalved rear, Eibach springs front 0.48 and stock YZ Ti rear 5.5

Protection: Scorpion Skid Plate, Acerbis Bark Busters, WC rear calliper guard, Devol rear disc guard and Flatland front, Unabiker Rad guards, GYTR CS sprocket cover and timing plugs

Tires/Wheels: Washougal Sticky front and rear

Driveline: Aluminum rear sprocket 13/51, GYTR X-ring chain, TM designs chain guide, TM designs chain slider

Chassis: ARC C-5 shorty clutch and brake lever, GYTR thumb hot start, Tusk axle blocks, Tusk 1.5" bar raisers, YZ left foot peg mount ( kickstand removed ), Moose titanium pegs, Stainless steel front brake line

Electrical: Ebatt Lithium to stock charging system

Cosmetic: One industries graphics, Guts tall medium foam, factory edition seat cover

Miscellaneous: IMS 3.1 gal tank, YZ shrouds, 06 petcock

Comments: This thing is a torque monster, will walk uphill, low idle, not touching throttle. Can pull a high gear anywere, impossible to stall.

Edited by tribalbc

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