- 400ex low rpm miss???? (5 replies)
- Yoshimura (3 replies)
- Do i need to re jett if im gettign a wb e serious slip on pipe?? (8 replies)
- Big Gun Complete System? (2 replies)
- Which Pipe (14 replies)
- Stock plugs (1 replies)
- what is the correct spark plug gap for a 400EX? (5 replies)
- Motor Tear Down??????? (0 replies)
- i desperately need help with my 416!! (18 replies)
- XR 400 cam update (20 replies)
- Adding Disks to WB and Quiet Core? (1 replies)
- Changing Clutch ? ! ? Kinda' (8 replies)
- engine building (6 replies)
- How many discs??? (8 replies)
- #40 Pilot Jet (3 replies)
- whats the best big bore kit? (4 replies)
- Best Exaust?? (15 replies)
- carb suggestion (3 replies)
- carb question (1 replies)
- Please Help Sick 300ex (6 replies)
- what do you think it'll cost? (9 replies)
- changing c/s sproket on 300 (8 replies)
- prolem with my 300ex (7 replies)
- Cost Of Big Bore Kit (1 replies)
- Fouled Plug? (6 replies)
- Choke Plate/ Rev Box? (1 replies)
- Should I switch to a Twist Throttle? (33 replies)
- Oil Tank! (9 replies)
- Dyno Runs at ROUSH---DETROIT AREA (1 replies)
- Cdi Box (3 replies)
- yet another jetting question by a newbie (2 replies)
- What would be the best mod for the $?? (12 replies)
- sparks advanced key (8 replies)
- XR400 Cam (6 replies)
- Tech help please. ASAP (8 replies)
- Jeting and pipe question PLEASE... (2 replies)
- Dynojet Question (2 replies)
- running lean (2 replies)
- Do you really have too break in a cam? (9 replies)
- suzuki DRZ in 400ex -- please help (5 replies)
- is it worth the $ and trouble?? 330 kit for my 300 (3 replies)
- Jetting made easy (1 replies)
- Whose Got a Pro Circuit Silencer? (5 replies)
- hopefull raptor killer (20 replies)
- Pilot Jet Size (3 replies)
- Question for those with aftermarket exhaust and airbox mods (3 replies)
- How To Jet (5 replies)
- 40 Pilot Jet Part Number (4 replies)
- Stock Hedder (1 replies)
- Clutch slipping? (10 replies)
- engine rebuild (6 replies)
- lilred....got a question for you... (4 replies)
- Pipe change???? (1 replies)
- How can you find out if you have jeted correctly?? (13 replies)
- This is a 2002 right? Then why doesnt it start! Help! (28 replies)
- need help installing new 300ex clutch (1 replies)
- Another Jetting question!!!!!! (1 replies)
- 400 Ex Clicking Noise (15 replies)
- need help with carb mod (2 replies)
- Changing Clutch Cable On 300ex (5 replies)
- shift fork (2 replies)
- 250r tranny (2 replies)
- jetting survey (35 replies)
- how much$$ for a bore / port (1 replies)
- fmf hi flo header? (3 replies)
- no-start ignition problem (0 replies)
- 300ex pipe choice (5 replies)
- WB owners please read and reply!!! (15 replies)
- 350x vs 400ex round 1 (20 replies)
- Carb ? (2 replies)
- Broken DynoJet Adapters (1 replies)
- i need some help (4 replies)
- Jetting Question?? (1 replies)
- Port And Polish? (4 replies)
- Exhaust & Tech Help Please (3 replies)
- Need help fast! Emergency jetting question!! (10 replies)
- Pipe Prices (14 replies)
- jetting sizes with a WB slip-on and K&N power kit?? (3 replies)
- WB Rev limiter ? (1 replies)
- How Far can a 400 go? (29 replies)
- Drag Motor (14 replies)
- Ordered: FMF Powercore IV-2 S/A full system (0 replies)
- Rev Limiter (17 replies)
- ? about the WB E- series Pipe (27 replies)
- DS650 carb on a 400ex? (1 replies)
- 16th tooth sproket? (13 replies)
- 400ex carb on 300ex? (7 replies)
- K&N or UNI? (12 replies)
- Yoshimura COMP, White Bros. R4, Big Gun?? (7 replies)
- Need Some Help (1 replies)
- Larger Oil Cooler? (4 replies)
- How good is the stock head pipe on a 400? (5 replies)
- Cobra Exhaust... (33 replies)
- Awesome jetting help (6 replies)
- WB or Pro Circuit (16 replies)
- Jetting Help..... (2 replies)
- New parts, (7 replies)
- Pantyhose over your airbox with no lid??? (19 replies)
- Y does your engine run cooler if you re-jet and (or) put a pipe on?? (3 replies)
- Cough drops for my 400ex (8 replies)
- Four Stroke Tech cam (1 replies)
- For those FCR carb owners!!! (14 replies)
- Sputtering EX (3 replies)
- Big Bore Kits (1 replies)
- re-jett???? (3 replies)
- T-4 pipe? (3 replies)
- Trx250ex (14 replies)
- Filtered Airbox Vents (15 replies)
- Big Bores??? (3 replies)
- alternative to outerwears airbox cover (1 replies)
- larger oil tank?? (16 replies)
- Another jetting Question... (10 replies)
- 400EX spark plug choice for 13:1 race motor? (3 replies)
- Another jetting question with the e-series (3 replies)
- Gas Switch???? (4 replies)
- My 400EX is smoking (6 replies)
- Stalling (6 replies)
- Pro Circuit T-4 and jetting (2 replies)
- E-Series quiet core? (2 replies)
- Big Gun, Yoshimura, White Bros R4???? (1 replies)
- Big Gun or Yoshimura? (4 replies)
- Trx426f!!?? (3 replies)
- Electrical problem please help!!!!! (7 replies)
- What's wrong? Please help!!! (3 replies)
- engine cutting out (7 replies)
- wb e-series sounds crapy after warmed up (0 replies)
- 400ex Pipes (again) (3 replies)
- Octane With 11:1compression (7 replies)
- Why is my 300 smoking? (10 replies)
- Yoshi pipe (10 replies)
- E-series Questions (4 replies)
- 416 jetting question and overheating problem?? (7 replies)
- FMF Power core IV-2 for 300ex (4 replies)
- New cam for 300ex (0 replies)
- Whats better of the 2 carbs??? (10 replies)
- Oil Tank breakage (18 replies)
- Floatbowl screws!?!?! (13 replies)
- Jetting Question (5 replies)
- Jetting for the WB E-Series (2 replies)
- Not a jetting problem? (25 replies)
- How many horses??? (3 replies)
- What is the diff? (0 replies)
- Vibration?? (5 replies)
- Carb Selection (4 replies)
- Removeing Choke on a 400ex (1 replies)
- Help!!!!! (2 replies)
- How good is the K&N filters?? (15 replies)
- Power up kit or dynojet?? (3 replies)
- K&N Filter Outerwear and Airbox Outerwear? (13 replies)
- k&n (1 replies)
- Exhaust mod??????? (1 replies)
- How is the T-4? (8 replies)
- OuterWear over uni ? (0 replies)
- Ignition (2 replies)
- Removing Air Box (1 replies)
- I want more power (12 replies)
- E-Series Question Again (3 replies)
- White Bros. E-series Vrs Exhaust Mod (3 replies)
- My K&N Precharger tore again (6 replies)
- Honda Utility Iwth A 4 Valve Head (0 replies)
- Changing jets on 300ex? (4 replies)
- K&N Filter and jet worth the $$$ (17 replies)
- Best 300ex Pipe (10 replies)
- lean jetting stock? (2 replies)
- rate the ids2 (2 replies)
- taking the choke out (6 replies)
- Burning oil (24 replies)
- Oil leak around clutch shaft (4 replies)
- Dead motor in water. (11 replies)
- Airbox Lid??? (8 replies)
- Most H.p.! (14 replies)
- cams and valves (0 replies)
- Colours of the spark plug??? (7 replies)
- racing cam (1 replies)
- LRD 460 or Sparks 465!!!!!!!!!!!!!!!!! (0 replies)
- White Brothers or FMF???? (14 replies)
- What to clean the engine/chassis with (10 replies)
- octane question (11 replies)
- 416 stroker kit (440) (6 replies)
- Stock Bore JE Piston (46 replies)
- Air Screw Location? (1 replies)
- White Brothers Slip on Silencer (3 replies)
- 330 kit for 300ex (0 replies)
- Jetting Sizes (5 replies)
- What Compression piston (20 replies)
- Help Jetting a 400 EX? (10 replies)
- Best Overall Modification to Motor (13 replies)
- cylinder head bolts? (5 replies)
- 400 ex cylinder wall material? (2 replies)
- E-Series Question (12 replies)
- clutch problem? (6 replies)
- xr400 head gasket (3 replies)
- how do u remove the rev limiter on a 300ex (2 replies)
- Please help 300ex sputters (12 replies)
- Please Please Help--advance Key? (3 replies)
- engine oil (8 replies)
- lrd chrome pipe (6 replies)
- FCR needle help (4 replies)
- Its time to put my motor back together (5 replies)
- GOLDEEN WEST CYCLE stage III (5 replies)
- Shaved Flywheel (12 replies)
- Tachometer (5 replies)
- first mod (21 replies)
- WB E-Series owners...question for you (5 replies)
- 300ex carb modification (2 replies)
- 400ex governor? (9 replies)
- main jet size (0 replies)
- 300 ex rev limiter (1 replies)
- My 440 sputters on low end (9 replies)
- a different pipe question (9 replies)
- need power fast!! (3 replies)
- Pipe/header for more top end on 300EX? (4 replies)
- Aluminum Airbox (2 replies)
- Sound Levels? (10 replies)
- rev kit (27 replies)
- K&N Jet Kit on 400 (3 replies)
- Stock Silencer Mods (6 replies)
- Backfire (6 replies)
- quiet exhaust? with power upgrade (10 replies)
- Best WB price? (10 replies)
- kill switch??? (1 replies)
- Drilled Holes in Airbox:Need Help Please (6 replies)
- Breather Tube (0 replies)
- Engine Mods ???? (1 replies)
- 250EX exhaust (5 replies)
- Best pipe In your opinion??? (15 replies)
- Choke plate removal (14 replies)
- Carb help!!! (11 replies)
- FYI advantages of each pipe (23 replies)
- Best 416 kit? (27 replies)
- Exhuasts (10 replies)
- jetting an FCR (4 replies)