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  1. I need more power! (2 replies)
  2. Newbie! need some help... (11 replies)
  3. Installing JE 416 piston, simple question? (4 replies)
  4. 250ex Backfiring and popping, please help! (3 replies)
  5. more POWER (3 replies)
  6. Valve spring compressor (4 replies)
  7. HELP: my exhust is throwing 20" flames HELP (18 replies)
  8. 300ex head (1 replies)
  9. What kinda top end kit dosen't (4 replies)
  10. powroll what do u think? (13 replies)
  11. Hey Warrior Man... (1 replies)
  12. where to get jets? (2 replies)
  13. jetting & gearing at Dumont? (2 replies)
  14. 300EX / 250X Snorkel ??? (2 replies)
  15. Doing some mods and have a Question (1 replies)
  16. twin pipes for the 400ex (25 replies)
  17. white smoke (5 replies)
  18. Water getting into the air box 250x (0 replies)
  19. Where to start for a 416 kit? (2 replies)
  20. 330 Big Bore Kit (1 replies)
  21. This can't be right, FCR 39mm? (2 replies)
  22. What do you MX racers do to your snorkal? (15 replies)
  23. 400EX Cams (1 replies)
  24. Jetting 400EX w/K&N and 11:1 Wiseco (0 replies)
  25. 36mm mukini (2 replies)
  26. k+n filter jetting (0 replies)
  27. directhits ignition system best bang for buck (0 replies)
  28. just testing (1 replies)
  29. best pipe for 250ex (19 replies)
  30. jetting with an fmf (4 replies)
  31. Shifter wore hole in crank case (7 replies)
  32. hmf for 250ex (1 replies)
  33. How to make airbox? (1 replies)
  34. cr500 motor in a 400 ex (4 replies)
  35. procircuit t-4 slip on for a 400ex (7 replies)
  36. cam (0 replies)
  37. Grindin Welds (8 replies)
  38. XR400 Cam??? (1 replies)
  39. Nerf bars (2 replies)
  40. Flow numbers? (12 replies)
  41. XR650R powered quad or??? (0 replies)
  42. Clutch? (2 replies)
  43. ATTN: Mickey Dunlap (3 replies)
  44. pipe and air filter (5 replies)
  45. Need Help! What Pilot To Run With A 440? (2 replies)
  46. Oil Out Of Crank Case...but No Crack Help (3 replies)
  47. Removing Exhaust baffel (1 replies)
  48. r-seriers vs. e-seriers (1 replies)
  49. I bent my WB PIPE already (4 replies)
  50. WB Eseries RESULTS as promised. (20 replies)
  51. Is this a pilot ??????????? 400EX CARB (4 replies)
  52. Please Help Me Quickly!!!!!!!!!! (6 replies)
  53. valve help (2 replies)
  54. I need help with my set-up (5 replies)
  55. Curtis Sparks 39mm FCR Throttle Cable? (1 replies)
  56. Is it worth buying the jet kit? (2 replies)
  57. CDI boxes again (6 replies)
  58. 250R Motors (4 replies)
  59. 440 kits (1 replies)
  60. I got my WB Eseries Today!! (3 replies)
  61. Energy Release? (2 replies)
  62. 440vs416 for hillclimbing!!!! (3 replies)
  63. Cold Weather+No Choke+42/45 Pilot=hard to start or not? (13 replies)
  64. Skid Plate (7 replies)
  65. Dyno (0 replies)
  66. Powercore Iv-2 Q S/a (9 replies)
  67. 400ex stroker crank (0 replies)
  68. Inline Fuel Filters (13 replies)
  69. K&N Filter (2 replies)
  70. 440 ex first ride results (0 replies)
  71. WB E-series tunning (8 replies)
  72. Question on instaling and jetting wb e series? (2 replies)
  73. what 400ex exhaust? (12 replies)
  74. Engine ticking some help (1 replies)
  75. If you know the 400 motor stop here! (21 replies)
  76. rev limiter (3 replies)
  77. Rockymountainatv (7 replies)
  78. IDS2 for 300EX... (4 replies)
  79. 440ex... please help me with my CARB (10 replies)
  80. 400ex carb and 350x air boot (2 replies)
  81. pro circuit (3 replies)
  82. 400ex ring gap (9 replies)
  83. 416 going In NEED HELP/ASAP (9 replies)
  84. HELP FAST I am removing my choke plate an got a question (2 replies)
  85. Stock Engine, Oversized Headers (13 replies)
  86. review on the 250ex big gun slip-on (0 replies)
  87. 250x top end noise (0 replies)
  88. 416???? (16 replies)
  89. Rejetting Question (2 replies)
  90. Poweroll (1 replies)
  91. 400ex MODS (4 replies)
  92. Removing a link. (9 replies)
  93. 39mm Carb,,,what end result?? (3 replies)
  94. Lectron Carb Please help (22 replies)
  95. welds on head pipe? (8 replies)
  96. 416 kit (2 replies)
  97. high revving a 440 (3 replies)
  98. motor not pulling to redline (6 replies)
  99. Air box vents? (8 replies)
  100. Cracked piston? (2 replies)
  101. 400ex spark arrester (4 replies)
  102. Pic of the Trx465 (8 replies)
  103. xr400 cam in a 440? (6 replies)
  104. FST 440 kit (17 replies)
  105. Carb troubles (7 replies)
  106. Chains/sprockets (1 replies)
  107. 300ex problem(because it is so cold) (0 replies)
  108. 39 FCR carb help! (14 replies)
  109. Motor Life (14 replies)
  110. Last Sunday I got bored and......... (3 replies)
  111. reverse kit for 400 ex (2 replies)
  112. Where to buy yoshi/e-series from? (5 replies)
  113. Big Bore Kit? (0 replies)
  114. 416 gaskets? (0 replies)
  115. Yoshimura, WB and dmc pipes for a 300ex (11 replies)
  116. choke removal? (8 replies)
  117. 250x valve specs and comp ratio ??? (2 replies)
  118. spark arrester (0 replies)
  119. Marcums 416 kit (18 replies)
  120. Is 165 main jet too large? (17 replies)
  121. Carbueration advice please? (9 replies)
  122. Sparks or E-series? (4 replies)
  123. It's on it's way!!!!!!!!!!!!!!!! (7 replies)
  124. best place to get a k&n power kit (6 replies)
  125. has any body ever done a weelie on a 250ex and gas leeked (6 replies)
  126. Oil strainer screen (1 replies)
  127. Exhaust ? (0 replies)
  128. 440 Jetting (0 replies)
  129. Rev box (3 replies)
  130. 400EX head bolt specs.(i need them today) (4 replies)
  131. Q-Series??? (9 replies)
  132. bore it.. or sale it? (33 replies)
  133. What gasket should I use w/ a 416 kit? (9 replies)
  134. 330R vs. Cannondale speed (9 replies)
  135. Best pipe for Stock 400ex (19 replies)
  136. TC racing cam (5 replies)
  137. Proper break in for a 416EX? (9 replies)
  138. Choices Choices (0 replies)
  139. 400ex Cams (0 replies)
  140. 250r engine in 300EX frame?? (0 replies)
  141. 350X Exhaust (7 replies)
  142. hinson clutch and hydraulic clutch kit compatability (1 replies)
  143. 250r front calipers on a 400ex? (2 replies)
  144. yoshimura sound anything like supertrapp? (14 replies)
  145. Fram oil filter part numbers (0 replies)
  146. 250x to 350x?? (0 replies)
  147. 14t front sprocket and stock chain??? (7 replies)
  148. Tc Racing (25 replies)
  149. White Brothers or DMC? (3 replies)
  150. Trinity 465 Stroker (165 replies)
  151. 416 or higher comp. ratio? (2 replies)
  152. 416 jetting (5 replies)
  153. 330R or 440EX (13 replies)
  154. 400EX with XR650 engine? (2 replies)
  155. 2 stroke piston and compression (3 replies)
  156. Valve clearance...... (1 replies)
  157. HMF engineering slip-on (6 replies)
  158. Sparks (4 replies)
  159. piston question (0 replies)
  160. Stock bore 10.8-1 piston + XR400 Cam? (10 replies)
  161. Seriously,Can a 416ex Smoke a Raptor? (5 replies)
  162. Sparks Pipe Question (45 replies)
  163. xr's hrc copy cam? (2 replies)
  164. main jet in 300ex (2 replies)
  165. 300 EX axle replacement (2 replies)
  166. slipping clutch!!!! (2 replies)
  167. Viton Valve Seal Install.....Please Help (1 replies)
  168. A 250x Question (7 replies)
  169. Also Reverse rev Limiter ? (13 replies)
  170. Rev Limiters ? (8 replies)
  171. 12.5-1 vs 10.8-1 piston (9 replies)
  172. HRC cam - no new piston (13 replies)
  173. FST 300 oil cooler (18 replies)
  174. Hesitating? (4 replies)
  175. 36mm carb (5 replies)
  176. cam in a 400ex... (16 replies)
  177. oversized headpipe needed (1 replies)
  178. Barnett Clutch Plates?????HELP (4 replies)
  179. leaking oil (6 replies)
  180. This is getting OLD (23 replies)
  181. main and piolit jetting (1 replies)
  182. running alcohol on my 400ex (2 replies)
  183. dumb ? (5 replies)
  184. 300 cdi (3 replies)
  185. 500cc Big Bore Kit (4 replies)
  186. 400ex COOL KIT ???? (4 replies)
  187. 350x 5 or 6 speed?? (10 replies)
  188. Gear Ratio Calculator!!!! Good thing to use (2 replies)
  189. Need some advice..... (14 replies)
  190. K&N jet kit question (1 replies)
  191. New life for Cobra exhausts???? (1 replies)
  192. Shift rod broken (1 replies)
  193. Hrc Not Much Better Than Stock (5 replies)
  194. air filter question! (12 replies)
  195. alum airbox (2 replies)
  196. a few questions on installing cam/springs? (1 replies)
  197. Which Clutch? (4 replies)
  198. E-sereies.......... regular or promeg ?????? (2 replies)
  199. cr250 motor in a 300 (12 replies)
  200. off set fly wheel key (1 replies)
  201. Durablue Posi-Lock Nut ??'s (1 replies)
  202. 250 X jetting question (3 replies)
  203. Powroll Engines (11 replies)
  204. Seriously, is the 400 EX as fast as a....... (5 replies)
  205. better then the t-4 (16 replies)
  206. what store is the best place to order (5 replies)
  207. info needed for a roost boost plus (2 replies)
  208. magura clutch (2 replies)
  209. header pipe (7 replies)
  210. spockets ? (4 replies)
  211. Is there machine work required for the 416 kit (4 replies)
  212. tc racing pipe (3 replies)
  213. NO NEED For BIGGER CARB? (3 replies)
  214. 400ex cam?? (19 replies)
  215. Benefits of a 14 tooth sprocket??? (2 replies)
  216. How far over is a 416? (1 replies)
  217. Stock Header Removal?? (1 replies)
  218. XR650 Engine (19 replies)
  219. Weird grinding noise... (8 replies)
  220. 416? (13 replies)
  221. Oil tank leaking (2 replies)
  222. fourstroke tech 330 (3 replies)
  223. 440 or 416 (14 replies)
  224. WB E-Series vs. Big Gun??? (14 replies)
  225. just bought the WB full race kits! your thought's please! (3 replies)
  226. Clutch cable? (0 replies)
  227. Air Screw (9 replies)
  228. rims are scratched to easy (4 replies)
  229. LRD EXHAUST please help (2 replies)
  230. Millienium Tapered bearing Carrier (3 replies)
  231. performance help (10 replies)
  232. Building up Brother's 400EX (3 replies)
  233. lowering the engine temp? (2 replies)
  234. Cheapest place to buy Keihin carb? (7 replies)
  235. To Port & Polish or To Big Bore for the 400ex (16 replies)
  236. electrical question (3 replies)
  237. 300ex Exhaust (5 replies)
  238. Power for my 250x (9 replies)
  239. compression reading=what ratio??? (1 replies)
  240. help on 440 (2 replies)
  241. not to my studies (0 replies)
  242. 750ex (20 replies)
  243. 250ex power (0 replies)
  244. Jetting??? (0 replies)
  245. pipe fmf (0 replies)
  246. dyno charts (0 replies)
  247. 250ex (3 replies)
  248. Carb/jetting Question (2 replies)
  249. front sprocket (4 replies)
  250. stock axle sprocket hub (1 replies)