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:::YFZ450 Performance:::
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07 Oil Pump Difference
(10 replies)
Crankcase Cover
(2 replies)
Twist Throttle
(11 replies)
Cutting Out 1/2- Full Throttle.
(15 replies)
Another Exhaust Question
(3 replies)
Bike Cutting Out...
(30 replies)
I Need Jetting Help My Bike Wont Idle
(7 replies)
Delete
(0 replies)
Hr Stroker Crank
(10 replies)
To Those With Lrd Pro4 Full Systems
(1 reply)
I Cant Find The Wrist Pin Keeper/clip
(13 replies)
Gas Valve
(3 replies)
Can I Use An Exhaust That Came Off A 05?
(1 reply)
Quick Carb Question
(1 reply)
Exhaust Systems
(1 reply)
Whats This Electrical Box
(5 replies)
Cracked Fmf Slip On
(4 replies)
Dr. D Slip On , Mounting Brackets Breaking.
(0 replies)
Runs Crappy @ 3/4 Throttle
(5 replies)
Carb Problem
(4 replies)
Fan Question
(11 replies)
Edelbrock Carb.
(1 reply)
Back Fireing
(15 replies)
Yoshimura Exhaust
(1 reply)
Removing Left Case
(6 replies)
Dasa Packing Blowing Out Front Of The Pipe
(8 replies)
Exhaust Question
(3 replies)
Jetting My 450
(6 replies)
Dual Exhaust Header Pipe
(0 replies)
Need Some Help
(7 replies)
+ 1 Valves ?'s
(12 replies)
Lean Backfire (misfire) Vs. Rich Backfire (misfire)
(1 reply)
Factory Works Yfz450r
(82 replies)
How Much More Hp With The Big Bore?
(2 replies)
07 Yfz450se Starting Issues
(1 reply)
Turns Over Great But Wont Start...?
(1 reply)
Best Pipe For My Riding
(8 replies)
Please Help Me :(
(4 replies)
Who Polish's Engine Case's?
(0 replies)
Replacement Coolant Bottle
(17 replies)
Rev Box Problems
(1 reply)
Problems Since Ive Installed An Exhaust
(9 replies)
Overheating Problem...?
(5 replies)
O8 Gets Hot And Stops
(2 replies)
Oil At Top Of Sump
(14 replies)
Trany Question
(8 replies)
Do I Need To Jet?
(7 replies)
Please Help
(6 replies)
Quad Will Die Only If I Slowly Touch The Throttle
(12 replies)
Ignition Coil Gone Bad?
(5 replies)
Synthetic Oil
(8 replies)
35# Leak Jet In Conjunction With Quickshot Ii Acc Pump Cover?
(5 replies)
Hmf Map For Pc5?
(21 replies)
Battery Is Not Getting Any Charge.
(3 replies)
Need Help. Electrical Problem
(13 replies)
Dasa 99db Vs. Venom
(13 replies)
Jetting Enuf Said
(2 replies)
Lockout
(4 replies)
Another Jetting Question
(1 reply)
Piston Change How To
(13 replies)
Need Help
(3 replies)
Clutch , Who Knows What Parts Shot ?
(3 replies)
Can This Be Painted?
(14 replies)
Yfz450 Lower Geared?
(1 reply)
Starting/electrical ..help Needed
(8 replies)
Kick Start Electircal
(2 replies)
Porting The Yfz450r Head
(24 replies)
A Little More Power
(12 replies)
Headpipe Worth It?
(12 replies)
Changing Clutch Plates And Springs.
(2 replies)
Please Help A Newb ?
(1 reply)
Need Help With Jetting
(4 replies)
Quad Bogging Down While Riding?
(7 replies)
Jsr
(1 reply)
Porting By Gassrx
(18 replies)
Yz Clutch Install Question
(2 replies)
Bad Dyno Numbers?
(24 replies)
Exhaust Questions?........why?
(18 replies)
Engine Vin #
(7 replies)
Won't Start - Has Spark, Air
(6 replies)
04 Yfz 450
(1 reply)
06headlight Question
(2 replies)
What Is The Biggest Bore And High Compression Piston Combo You Can Go
(10 replies)
Lockout
(2 replies)
Engine Oil
(14 replies)
Pro Jetters Couple ?
(5 replies)
Pcv Autotune Tips
(1 reply)
Water Pump Impeller, How Do I Remove It?
(2 replies)
Stock Jets
(4 replies)
Stock Pipe Buffle Drilling? Q: To Do Or Not To Do?
(5 replies)
Hmf Silencer Junk What Will Hmf Headpipe Other Than Hmf?
(5 replies)
Fan With No Battery
(0 replies)
Kick Start Question
(7 replies)
Need A Few Opinions And Facts About Top Ends
(3 replies)
Yfz Won't Start When Hot
(2 replies)
Cylinder
(18 replies)
Did The Zip Tie Mod Do This?
(10 replies)
What Piston = More Power
(1 reply)
Should I Be Saving Up?
(23 replies)
Aftermarket Clutch Perch
(2 replies)
What Pilot And Main Size Should I Start With?
(8 replies)
Cracked Case, Any Tips?
(2 replies)
Gearing Question, Sorry!
(16 replies)
Bogging
(2 replies)
Jetting Problem
(3 replies)
Charging/stator ?
(4 replies)
Hydrolic Clutch
(1 reply)
What Exctly Is The Zip Tie Mod
(1 reply)
Coolant
(0 replies)
Tps Question
(5 replies)
Installing Fuel Optimizer
(1 reply)
Yfzr Pipe Test
(12 replies)
Quick Easy Question
(3 replies)
Water Pump Hole Leaking
(1 reply)
Yz426f Kickstart Parts In My 2005 Yfz 450 Motor
(0 replies)
Idle Or Valve Adjustments?
(1 reply)
What Is The Biggest Bore And High Compression Piston Combo You Can Go
(0 replies)
High Compression Piston ?s
(26 replies)
Slip On Or Full Exhaust
(10 replies)
Need Some Help With Quad Jetting Please
(13 replies)
Bike Won't Start Unless Drifted.
(5 replies)
Who Makes Metal Base Gaskets
(6 replies)
Will Not Idle W/o Choke
(7 replies)
Need Some More Insight
(13 replies)
Starter Relay
(19 replies)
Edelbrock Carb Help
(5 replies)
Please Help I Think Carb Problems.
(8 replies)
Hard Start, Cutting Out, High Idle
(4 replies)
Hot Pipe
(4 replies)
Selling My Sparks Big Core
(2 replies)
Scored Head
(5 replies)
Sprocket ?'s
(13 replies)
How Loud
(1 reply)
Aftermarket Exhaust Your Guys Opinion
(5 replies)
Rebuilt Motor Hard Start
(23 replies)
What Is The Part Number For A Nvcq Needle
(2 replies)
Horsepower
(9 replies)
Ebay Kickstart Kit From Ajracing
(23 replies)
Changing Exhausts
(2 replies)
My Water Pump Is Leaking From The Vent Hole
(5 replies)
Blown Head Gasket
(3 replies)
New Guy- In Over His Head On Engine Rebuild
(23 replies)
Need Help, Post Buildup, Minor Fixes
(12 replies)
Wr Crank
(2 replies)
What Nerf Bars Work With A Kickstart?
(3 replies)
Would You Pay For This?
(16 replies)
Black Box Under Fender
(1 reply)
Bored Carb Price From Vendors
(8 replies)
Motor Noise
(12 replies)
Esr Intake
(2 replies)
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