- ported head, jetting changed quite a bit
- no quick throttle response
- CRF450 in 400EX chain guide clearence?
- engine help
- another jetting ?
- Where to run hoses for 250x/300ex oil cooler
- 250r vs 400ex
- will it add more power
- How much to lighten a flywheel?
- anti freeze ratio
- stock cam vs. hotcam stage 1
- how do i increase top end
- Is there a way to add.....
- few questions
- Race Gas...
- megamax
- 400ex head stud problem HELP!!
- i need a cam.
- what is making the hissing
- 04 400 rancher problem
- 300 EX rear sprocket
- white brothers pro carbon fiber exhaust
- Wiseco Piston Kit
- something all bikes should have
- no airbox lid?
- Yoshi pipe with WB head pipe?
- jetting a big gun 250ex
- 350 big bore
- 300ex upgrades
- what is the best axle length
- ims fuel tank
- Chain size?
- 200sx won't run
- TRX250X Big Bore Kit
- FMF headers
- Jets????
- new axle
- My Quad is Slow "Bull"
- Corosion on electronics
- AvGas Question ????
- sprocket question?
- 18in rear tires- sprocket help
- nitrous
- I need a pipe
- Need info on Raptor cylinder and piston
- Question about jetting
- sprockets
- pipe question
- EX wont start
- throttles
- Piston Is Jammed Help!
- 250x RACE ENGINE SUGESTIONS
- jetting question-no intake "stuff"
- Question for you guys...
- curtis sparks x6 exhaust
- Sparks X-6
- 400ex Jetting
- HMF on a powerbomb header?
- Cam upgrade/ exhaust
- 440 kit worth it
- best exhaust for 300ex
- Tear down begins tonight
- 400ex Starting Problems? Help...
- Bearing Carrier
- 2004 rm 125 jetting
- mickey dunlap
- Stage 2 hotcam in stock engine
- How much would you pay for this?
- Valves leaking
- carb size
- anyone selling an engine?
- Reeds..worth it?
- hot cams or web cams
- No fuel when ridin a wheelie!!!
- hotcams stage 1
- Big Gun or HMF?
- best pipe for a 04' 400Ex?
- tow straps
- 300ex vs. blaster
- Outerwear: AIRBOX or FILTER??
- jetting Question
- What do you guys think?
- Motor sound ??
- Cold natured?
- whats the deal with my quad.
- 11.1 compression do i need to run race gas?
- Im not going to screw up my quad, am I?
- won't start????? please help
- Is it just me???
- piston?
- were is the rev box located on the 400ex
- how many horespower willa hot cam give
- sick 400ex i need help do not know what am doing wrong
- Spark Plug
- Banshee PIPES!!!!!
- Strange sound...
- Cylinder like thing in carb, what is it for.
- some????????????????????
- Piston question's
- New 400ex reverse
- Wiseco or Pro-X piston for a two stroke
- Kawi Mojave kick starter
- trx250ex mods QUICK HELP!!
- Trinity 465 stroker
- bypassed kill switch ?
- 400EX to 440
- 400ex Nitrous Users
- Cam Chain
- smokes on cold start- why?
- Oil Draining
- Yoshimura System ???
- 426EX Carb Problems
- Idle adjustment for 2003 250ex?
- exhaust gaskets, bolts for pipe
- need a little more
- Dont start in Cold
- Hotcams Stage I
- 05 400ex
- making my own 400/250r conversion
- piston kit??
- aluminium airbox ?
- 250x
- Port n Polish
- Won't Start, please help
- What color?
- After Market oil Cooler
- 450r Hp?
- blaster pipe
- scorpion
- Help or gonna blow motor.
- 400ex gas leak
- 300ex jetting?
- best predator pipe?
- LRD exhaust
- big bore for 300 ex
- oil filters
- jetting
- Help quicksilver carb-400ex
- type of oil to use?
- Which sprokets should i buy
- Notice a Difference with White Bros header?
- chain adjustment
- Oil Use
- 300ex starter
- help quick
- which pipe
- Whats wrong with my 400
- kind of clutch
- Polaris Scrambler
- Building a drag 400ex with nitrous
- Need some help! Hesitation
- XR200R - Hole in Piston
- jus a question?
- Upgrading an upgraded engine
- fcr39mm jetting HELP
- Motor Guru's please help - 2001 400ex rebuild
- FMF Powercore 4
- pipes for cheep
- 39t?
- HI-PERF Rectifier/Voltage Regulator ?
- cross threded spark plug?
- 05 250ex
- Help Exhaust Problem!
- LSR anti-fad nuts
- best 400ex pipe for Hp
- white brothers e-series promeg
- crf / trx timing chain
- oil pressure guage on 400ex
- How Much????
- Budget 416EX kit?
- 450r octane
- one valve ticking
- wire problem: need help
- Quadworks..
- Exhaust Question
- gforce or durablue
- 250EX Clutch
- Big Bore For A 250x
- xr400 cam, For a 400ex (SPECS)
- rebuilding a 400ex tranny
- Fst 500ex???
- 450r carb on 400
- 426EX head gasket
- headporting?
- hot cam stage 2 valve adjust.
- using Dirtbike killswitch
- ok will i be aight with a 160 Dynojet jet?
- xr flywheels
- will this do anything?
- Help with jetting/ too lean!
- will this help/hurt any?
- 400ex will not start
- my motor cuts out
- my other motor needs a new makeover
- how should i jet my bike?
- Help!!!!
- 400 ex motor
- throttle cable for FCR?
- big bore ???????
- 406 or 416?
- E-Series burning 300 plastic?!?!
- Noleen Exhaust
- white bros worth the money
- 400ex pipe
- Looney Tuned Exhaust
- Torque
- Urgent! Torque Specs???
- 400ex electrical problem is it the battery??
- fcr differences?
- Clutch
- 440 kit
- G-Force
- 300ex sprockets
- 400ex FCR question
- LRD Full Exhaust
- Drain plug lost! Need Help
- is the cfm airbox worth it?
- best pipe for 300ex
- Making an k&n airbox lid
- pic's of G-Force Racing Axle's
- jetting for 400ex carb on 300ex
- Clutch Disengagement Problem
- where is my electrical ground?
- stroker carb
- Raptor Compression Ring Question
- piston ring gap
- Compression Help Please!!!!
- advice on head gasket
- air box pics
- chain wax
- stock cam sprocket on hot cam stg 2
- g-force parts question
- What else can i do????
- ATTN: Mickey Dunlap. ATC500X??
- z400 carb?
- Does is take race gas?
- starter probs
- frying 400ex clutch cables...
- help! WHERE IS 400EX MAIN JET
- Keeping the 400ex cool
- yz kickstart question
- Quick YFZ Question .
- Need Warriror help bad!
- Runnin rich
- 99 carb probs?
- Spark plug socket
- Need some help by experienced people
- float vlave
- Hot Cam Stage 1 or 2?
- 450R silencer on a 400