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  1. hotcam STAGE 1 OR STAGE 2 (13 replies)
  2. what card does a 400ex have (7 replies)
  3. do 400's usually run hot (7 replies)
  4. Fuel Filters (3 replies)
  5. gear ratios? (3 replies)
  6. Duncan Fat boy exhaust (0 replies)
  7. jagg oil cooler (2 replies)
  8. 300 head work? (1 replies)
  9. ProfabATV, anyone know anything about em? (12 replies)
  10. Slipper clutch for 400ex (11 replies)
  11. why am i running lean? (3 replies)
  12. 440 Base gasket Oring question (2 replies)
  13. Tri-metal xr 400 gasket? (5 replies)
  14. 400EX Motor Problems (4 replies)
  15. HRC parts (2 replies)
  16. 250r engine..someone please answer (3 replies)
  17. 86 links in a 300ex chain? (7 replies)
  18. wrong forum for this (2 replies)
  19. Big bore vs stroker ? (7 replies)
  20. Yet Another Jetting + Carb Question (1 replies)
  21. 250R kicker skips (1 replies)
  22. Something electrical (11 replies)
  23. To stroke or not? (5 replies)
  24. Cheapest place to purchase LRD Pro 4? (3 replies)
  25. Pics of what happend..... (6 replies)
  26. 3 angle valve job on a 416 (9 replies)
  27. 416 with stage1 hotcams jetting (4 replies)
  28. powerbomb and bills thunder? (3 replies)
  29. can anyone help my friend out ??? (1 replies)
  30. spit and sputter!! (2 replies)
  31. someone figure out my carb!!! (4 replies)
  32. 400ex is pissing me off....help (11 replies)
  33. help w/ 330ex kit. (7 replies)
  34. 300ex motor work and pipe? (4 replies)
  35. Pipes for crf150 (4 replies)
  36. Hmf / T-4 / E-series (12 replies)
  37. je piston ? (4 replies)
  38. dial a jet (11 replies)
  39. Fiber is good for you?? (0 replies)
  40. 440 cylinder to stock cylinder (9 replies)
  41. Pipe:Sprocket ? (1 replies)
  42. K&N [jet kit ] quistion "main jet"??? (5 replies)
  43. choke removal jetting (5 replies)
  44. Why the x-6? (5 replies)
  45. Chain Removal and Gearing lessons (6 replies)
  46. 250r stroker question (3 replies)
  47. what gains do you think ill get? (2 replies)
  48. TC cam settings (5 replies)
  49. funny ticking noise (2 replies)
  50. Banshee is leaking anti-freeze outa top of head... (1 replies)
  51. Trail Tech (8 replies)
  52. 300ex clutch? (0 replies)
  53. jetting question for these mods (3 replies)
  54. What kind of performance gains? (4 replies)
  55. 400ex bog (4 replies)
  56. CRF 450 engine in 400 ex (2 replies)
  57. xr400 cam (32 replies)
  58. Simple Silencer Survey (50 replies)
  59. HELP HELP HELP! Problem with ESP Shift Program Honda Rancher........ (2 replies)
  60. To grind or not to grind (12 replies)
  61. Removing the paint on my cases and Cylinder... (10 replies)
  62. recomendation on jetting for cam and piston (2 replies)
  63. Exhaust ? (9 replies)
  64. Best Filter (31 replies)
  65. How Many links are on a 400ex chain? (4 replies)
  66. 400ex jetting prolems. NEED HELP!! (18 replies)
  67. high comp piston (1 replies)
  68. Where to get rings for a Ross piston? (2 replies)
  69. Quick ??? loose rear hubs!!! (3 replies)
  70. Cutting a Yoshi Exhaust... (3 replies)
  71. Advence ignition, good or trouble????? (11 replies)
  72. What is the quietest performance pipe for 400EX? (6 replies)
  73. setting timing (3 replies)
  74. Rebuilding engine (17 replies)
  75. what is the loudest pipe for the 400EX? (24 replies)
  76. pics (2 replies)
  77. just put in new hotcams stage 1 (5 replies)
  78. DG Xcelerator exhaust? (2 replies)
  79. Anyone a metal fabricator/machinist here? (6 replies)
  80. Need a picture... (1 replies)
  81. Whats the best pipe and silencer for a 250r? (18 replies)
  82. 14t front sprocket (8 replies)
  83. I have a few questions about a spacer plate on a 330, to make it a 350. (13 replies)
  84. Where can i get a good/cheap dome, piston,sleeve.....? (0 replies)
  85. My Spark Arrestor (8 replies)
  86. Anyone use this gearing? (13 replies)
  87. Sparks gasket of Cometic Flexsteel? (1 replies)
  88. Big Gun pipe combo (21 replies)
  89. 400ex cylinder problems HELP (8 replies)
  90. Rear axle carrier (2 replies)
  91. can you get a different size needle from keihin?? (12 replies)
  92. results from my cam/piston (0 replies)
  93. stock Carb question (3 replies)
  94. how do you all run? (14 replies)
  95. best yfz pipe (11 replies)
  96. my chain and sprockets (3 replies)
  97. Head gasket and stud dilema...(long) (6 replies)
  98. 250x decompression problems (2 replies)
  99. Bills pipe (3 replies)
  100. Jets!!! So Many Wich One??? (17 replies)
  101. Knocking noise while turning sharp at slow speed (15 replies)
  102. Engine Vibration (3 replies)
  103. best type of sprokets and chain (3 replies)
  104. wont run in high rpms??? (4 replies)
  105. clutch lifter pin (12 replies)
  106. pro curcuit t4 (4 replies)
  107. 425 owners post here (5 replies)
  108. Carb and jet (1 replies)
  109. Clutch Rubbing (1 replies)
  110. reeds (0 replies)
  111. What's wrong with my 300ex? (4 replies)
  112. hmf (2 replies)
  113. 300ex rockers (3 replies)
  114. will a 330 big bore and a cam do alot to a 300ex (4 replies)
  115. I blew out my crank BEARINGS!!!!!! (3 replies)
  116. overflow of my carb (1 replies)
  117. Motor Work (2 replies)
  118. Slip on pipe vs. Full exhaust system (2 replies)
  119. Blown HEAD gaskets (2 replies)
  120. QA and XR 50 carbs (3 replies)
  121. 300ex problem (6 replies)
  122. Help! Pappy? Anyone else? (6 replies)
  123. Clutch? (4 replies)
  124. cutdown supertrapp (7 replies)
  125. which cam (12 replies)
  126. FMF Jetting? (7 replies)
  127. 400ex blew smoke????? (2 replies)
  128. e-series (3 replies)
  129. how do i repack my dg krome power silencer (0 replies)
  130. washer under needle clip?? (9 replies)
  131. 1987 xr250r dirt bike compaired to 250ex (7 replies)
  132. pipe for 250ex (2 replies)
  133. the boys xr 70 troubles (18 replies)
  134. Flywheel (2 replies)
  135. 400ex *Gear Ratios* (4 replies)
  136. Pro-Fab 330 Kit (6 replies)
  137. 200x motor problems again..... (3 replies)
  138. knocking noise? (5 replies)
  139. info you all might enjoy... (37 replies)
  140. Sparks Timing Advance Key (3 replies)
  141. CRF450 ---> 400ex (4 replies)
  142. Check out my new oil tank with vents! (15 replies)
  143. how to figure hp (6 replies)
  144. Going to 22" rear tires, what gearing to offset (4 replies)
  145. twist throttle (2 replies)
  146. does rich mean... (9 replies)
  147. 300ex question? (11 replies)
  148. 1 word answer: DPR8Z same gap as DPR9Z? (7 replies)
  149. 300ex exhaust? (12 replies)
  150. Rear Brake Rotor options ?? (18 replies)
  151. Mixture screw question (7 replies)
  152. Changing gearing for bigger tires (6 replies)
  153. New clutch lever??????????? (11 replies)
  154. TC exhaust? (2 replies)
  155. new chain with a new 14 sprocket (2 replies)
  156. FCR stuck Throttle? (20 replies)
  157. ticking (9 replies)
  158. Will this engine ever be in a quad? (9 replies)
  159. need a little more (2 replies)
  160. flipped wheels? (10 replies)
  161. need help finding an old thread... (8 replies)
  162. hmf jetting help (10 replies)
  163. What pipe should i run with this engine kit??? (5 replies)
  164. Installing Head Stud ?'s (4 replies)
  165. which motor (3 replies)
  166. Timing questions..... (2 replies)
  167. just cut the stock pipe down a bit. (20 replies)
  168. rev box??? (6 replies)
  169. HMF Website?? (1 replies)
  170. K&N Air Filter + Dyno Jet Kit (7 replies)
  171. Wiseco Or Je (11 replies)
  172. ? about HEAD WORK? (1 replies)
  173. stock needle number?? (4 replies)
  174. I need the calculation to figure out cc's (12 replies)
  175. stroker pipe (5 replies)
  176. damage to motor (13 replies)
  177. 300ex cam=250x cam? (1 replies)
  178. Aftermarket cam, rocker arms??? (1 replies)
  179. anyone using the doug eichner 38 mm carb on a 440 ex? (3 replies)
  180. 300ex sounds and feels abnormal (6 replies)
  181. Titanium 4 (0 replies)
  182. 39 FCR carb question ??????????????? (6 replies)
  183. Head bolt tourqe specs? (4 replies)
  184. help 416 buildup (4 replies)
  185. 440 kits (0 replies)
  186. jb weld? (12 replies)
  187. LRD, Pro-Curcuit, or Bug Gun? (33 replies)
  188. need advice on exhaust (1 replies)
  189. Advance timing key? (7 replies)
  190. i need a 92mm piston 11-13 to 1 4 a 400ex (5 replies)
  191. Exhaust System on 400EX (2 replies)
  192. What Do You Guys Think? (1 replies)
  193. 250ex manual clutch kit (4 replies)
  194. Yamaha Will Always Rule (11 replies)
  195. Radiator Question (4 replies)
  196. Gearing XC (3 replies)
  197. Melted pistons= bad news (7 replies)
  198. bearings (0 replies)
  199. LRD or E Series for 400 EX? (6 replies)
  200. Help with what to get for power (2 replies)
  201. Aluminum air box???? (13 replies)
  202. head bolt (1 replies)
  203. Clutch Shifter Pin (4 replies)
  204. Advanced timing key? (10 replies)
  205. Best Exaust For a 250R (2 replies)
  206. shortining silencer? (10 replies)
  207. I need help !! (1 replies)
  208. Who has a HMF pipe? (3 replies)
  209. 2001 250ex carb drain tube (0 replies)
  210. 416 mx motor (10 replies)
  211. crf450r carb in a 400ex (9 replies)
  212. how can i make my400ex faster? (18 replies)
  213. fatboy4 (6 replies)
  214. Front end problem (2 replies)
  215. cant get clutch adjusted right... (1 replies)
  216. Which ones??? (1 replies)
  217. when is your chain TOO loose? (29 replies)
  218. Switch to Synthetic or not to switch (18 replies)
  219. compression (32 replies)
  220. 04 400ex carb. (38mm) (3 replies)
  221. which exhaust?? (1 replies)
  222. Stroked motor? (2 replies)
  223. What's mu ney "cc" of my engine (2 replies)
  224. adjusting valve question... (9 replies)
  225. Um Air Box (2 replies)
  226. what else? (6 replies)
  227. 300ex to350x ari boot??help (8 replies)
  228. circlip fell into crankcase!!!! (9 replies)
  229. t-4 for 250ex (3 replies)
  230. 400ex cold engine rattle/ticking (7 replies)
  231. bog in the air (5 replies)
  232. Advanced Timing! (2 replies)
  233. radiators (3 replies)
  234. 39mm or 40mm FCR (10 replies)
  235. Sweet HMF (2 replies)
  236. loose chain????? (7 replies)
  237. Assembly lube for new cam (6 replies)
  238. Upgrade the 400 (2 replies)
  239. 16T front sprocket (16 replies)
  240. need help!!please (5 replies)
  241. Has to be the main jet.... (8 replies)
  242. Need Help On Motor Decisions (8 replies)
  243. Spark Arrestor Help! (8 replies)
  244. help with new 400 (10 replies)
  245. jet question?? (7 replies)
  246. New to 4 strokes, how to make it fast? (0 replies)
  247. Anyone got motor work done by sparks? (4 replies)
  248. Rebuild (0 replies)
  249. 300ex jetting (5 replies)
  250. port an polish? (3 replies)