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  1. jetting an FCR
  2. Exhuasts
  3. Best 416 kit?
  4. FYI advantages of each pipe
  5. Carb help!!!
  6. Choke plate removal
  7. Best pipe In your opinion???
  8. 250EX exhaust
  9. Engine Mods ????
  10. Breather Tube
  11. Drilled Holes in Airbox:Need Help Please
  12. kill switch???
  13. Best WB price?
  14. quiet exhaust? with power upgrade
  15. Backfire
  16. Stock Silencer Mods
  17. K&N Jet Kit on 400
  18. rev kit
  19. Sound Levels?
  20. Aluminum Airbox
  21. Pipe/header for more top end on 300EX?
  22. need power fast!!
  23. a different pipe question
  24. My 440 sputters on low end
  25. 300 ex rev limiter
  26. main jet size
  27. 400ex governor?
  28. 300ex carb modification
  29. WB E-Series owners...question for you
  30. first mod
  31. Tachometer
  32. Shaved Flywheel
  33. GOLDEEN WEST CYCLE stage III
  34. Its time to put my motor back together
  35. FCR needle help
  36. lrd chrome pipe
  37. engine oil
  38. Please Please Help--advance Key?
  39. Please help 300ex sputters
  40. how do u remove the rev limiter on a 300ex
  41. xr400 head gasket
  42. clutch problem?
  43. E-Series Question
  44. 400 ex cylinder wall material?
  45. cylinder head bolts?
  46. Best Overall Modification to Motor
  47. Help Jetting a 400 EX?
  48. What Compression piston
  49. Jetting Sizes
  50. 330 kit for 300ex
  51. White Brothers Slip on Silencer
  52. Air Screw Location?
  53. Stock Bore JE Piston
  54. 416 stroker kit (440)
  55. octane question
  56. What to clean the engine/chassis with
  57. White Brothers or FMF????
  58. LRD 460 or Sparks 465!!!!!!!!!!!!!!!!!
  59. racing cam
  60. Colours of the spark plug???
  61. cams and valves
  62. Most H.p.!
  63. Airbox Lid???
  64. Dead motor in water.
  65. Oil leak around clutch shaft
  66. Burning oil
  67. taking the choke out
  68. rate the ids2
  69. lean jetting stock?
  70. Best 300ex Pipe
  71. K&N Filter and jet worth the $$$
  72. Changing jets on 300ex?
  73. Honda Utility Iwth A 4 Valve Head
  74. My K&N Precharger tore again
  75. White Bros. E-series Vrs Exhaust Mod
  76. E-Series Question Again
  77. I want more power
  78. Removing Air Box
  79. Ignition
  80. OuterWear over uni ?
  81. How is the T-4?
  82. Exhaust mod???????
  83. k&n
  84. K&N Filter Outerwear and Airbox Outerwear?
  85. Power up kit or dynojet??
  86. How good is the K&N filters??
  87. Help!!!!!
  88. Removeing Choke on a 400ex
  89. Carb Selection
  90. Vibration??
  91. What is the diff?
  92. How many horses???
  93. Not a jetting problem?
  94. Jetting for the WB E-Series
  95. Jetting Question
  96. Floatbowl screws!?!?!
  97. Oil Tank breakage
  98. Whats better of the 2 carbs???
  99. New cam for 300ex
  100. FMF Power core IV-2 for 300ex
  101. 416 jetting question and overheating problem??
  102. E-series Questions
  103. Yoshi pipe
  104. Why is my 300 smoking?
  105. Octane With 11:1compression
  106. 400ex Pipes (again)
  107. wb e-series sounds crapy after warmed up
  108. engine cutting out
  109. What's wrong? Please help!!!
  110. Electrical problem please help!!!!!
  111. Trx426f!!??
  112. Big Gun or Yoshimura?
  113. Big Gun, Yoshimura, White Bros R4????
  114. E-Series quiet core?
  115. Pro Circuit T-4 and jetting
  116. Stalling
  117. My 400EX is smoking
  118. Gas Switch????
  119. Another jetting question with the e-series
  120. 400EX spark plug choice for 13:1 race motor?
  121. Another jetting Question...
  122. larger oil tank??
  123. alternative to outerwears airbox cover
  124. Big Bores???
  125. Filtered Airbox Vents
  126. Trx250ex
  127. T-4 pipe?
  128. re-jett????
  129. Big Bore Kits
  130. Sputtering EX
  131. For those FCR carb owners!!!
  132. Four Stroke Tech cam
  133. Cough drops for my 400ex
  134. Y does your engine run cooler if you re-jet and (or) put a pipe on??
  135. Pantyhose over your airbox with no lid???
  136. New parts,
  137. Jetting Help.....
  138. WB or Pro Circuit
  139. Awesome jetting help
  140. Cobra Exhaust...
  141. How good is the stock head pipe on a 400?
  142. Larger Oil Cooler?
  143. Need Some Help
  144. Yoshimura COMP, White Bros. R4, Big Gun??
  145. K&N or UNI?
  146. 400ex carb on 300ex?
  147. 16th tooth sproket?
  148. DS650 carb on a 400ex?
  149. ? about the WB E- series Pipe
  150. Rev Limiter
  151. Ordered: FMF Powercore IV-2 S/A full system
  152. Drag Motor
  153. How Far can a 400 go?
  154. WB Rev limiter ?
  155. jetting sizes with a WB slip-on and K&N power kit??
  156. Pipe Prices
  157. Need help fast! Emergency jetting question!!
  158. Exhaust & Tech Help Please
  159. Port And Polish?
  160. Jetting Question??
  161. i need some help
  162. Broken DynoJet Adapters
  163. Carb ?
  164. 350x vs 400ex round 1
  165. WB owners please read and reply!!!
  166. 300ex pipe choice
  167. no-start ignition problem
  168. fmf hi flo header?
  169. how much$$ for a bore / port
  170. jetting survey
  171. 250r tranny
  172. shift fork
  173. Changing Clutch Cable On 300ex
  174. need help with carb mod
  175. 400 Ex Clicking Noise
  176. Another Jetting question!!!!!!
  177. need help installing new 300ex clutch
  178. This is a 2002 right? Then why doesnt it start! Help!
  179. How can you find out if you have jeted correctly??
  180. Pipe change????
  181. lilred....got a question for you...
  182. engine rebuild
  183. Clutch slipping?
  184. Stock Hedder
  185. 40 Pilot Jet Part Number
  186. How To Jet
  187. Question for those with aftermarket exhaust and airbox mods
  188. Pilot Jet Size
  189. hopefull raptor killer
  190. Whose Got a Pro Circuit Silencer?
  191. Jetting made easy
  192. is it worth the $ and trouble?? 330 kit for my 300
  193. suzuki DRZ in 400ex -- please help
  194. Do you really have too break in a cam?
  195. running lean
  196. Dynojet Question
  197. Jeting and pipe question PLEASE...
  198. Tech help please. ASAP
  199. XR400 Cam
  200. sparks advanced key
  201. What would be the best mod for the $??
  202. yet another jetting question by a newbie
  203. Cdi Box
  204. Dyno Runs at ROUSH---DETROIT AREA
  205. Oil Tank!
  206. Should I switch to a Twist Throttle?
  207. Choke Plate/ Rev Box?
  208. Fouled Plug?
  209. Cost Of Big Bore Kit
  210. prolem with my 300ex
  211. changing c/s sproket on 300
  212. what do you think it'll cost?
  213. Please Help Sick 300ex
  214. carb question
  215. carb suggestion
  216. Best Exaust??
  217. whats the best big bore kit?
  218. #40 Pilot Jet
  219. How many discs???
  220. engine building
  221. Changing Clutch ? ! ? Kinda'
  222. Adding Disks to WB and Quiet Core?
  223. XR 400 cam update
  224. i desperately need help with my 416!!
  225. Motor Tear Down???????
  226. what is the correct spark plug gap for a 400EX?
  227. Stock plugs
  228. Which Pipe
  229. Big Gun Complete System?
  230. Do i need to re jett if im gettign a wb e serious slip on pipe??
  231. Yoshimura
  232. 400ex low rpm miss????
  233. what are the best upgrades for lots of power
  234. what pipe should i get
  235. Pro Circuit T4 / Quiet Core insert?
  236. what is the right quad to get?
  237. Piston Help
  238. Oil Cooler
  239. Installing A New Carb Jet
  240. cams
  241. Cam And Piston
  242. anyone tried the wiseco 10:1
  243. HP of 400ex?
  244. Adjusting Valves
  245. is a 14 front sprocket worth it for a 300ex??
  246. Oil Question, ASAP
  247. 416 reveiw
  248. What exhaust?
  249. head job ?
  250. Questions about getting a headpipe for my slip on?