View Full Version : Sportster Motorcycle Engine Conversions


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  1. The $10K Question
  2. Another NRHS 883-1250 conversion thread
  3. How to tell if you got a 883 or 1200
  4. Need help with "CP" Piston rings
  5. Help me finish my Thunderstorm Conversion
  6. Conversion is breathing good now!
  7. Good Engine Break-in article.
  8. Gaskets For Conversion....HD/SE or Cometic
  9. Ring Gap For Tstorm Pistons
  10. Phew
  11. just got conversion done...couple of ?'s
  12. 1212 conversion in process
  13. 1212 conversion in process
  14. stroker project and connecting rod HELP!
  15. A Question That May Not Be Able To Be Answer
  16. 1250 broke...88" on the way
  17. How Much Horespower???
  18. Which ignitions for conversion?
  19. Thinking about upgrading my 883
  20. How do they do it?
  21. Need help with pushrod tube leak
  22. 06 883 w/ 536's & hurricane pistons???
  23. 883 heads cannot work with 1200 pistons?
  24. Help needed with a 2007 883 to 1200 conversion.
  25. Dyno Your Bike And Save Your Motor!!!!!!!!!!!
  26. Best Prices for HD Cylinders & Pistons
  27. Which to use for 1200 conversion???
  28. Harley's 07 1200 conversion
  29. Help... spark and then smoke from cylinders on ignition
  30. my heads ported
  31. What to do before I start it up?
  32. 88 incher together.
  33. What do u think
  34. 1200 Conversion? Am I Confused...........
  35. question on tstorm heads/pistons
  36. cv carb question
  37. Conversion is done!!!!!!!!!!!!!!!!!!
  38. NRHS 1250 Redline?
  39. Am I being paranoid
  40. 1200 conversion fuel management (EFI)
  41. Why are my two Thunderstorm Pistons Different?
  42. what motor to use?
  43. 883 to 1200 conversion, 9:5.1 vs 10:1?
  44. Help....Pushrod base leak after conversion
  45. Branch Conversion...
  46. Need Comments Are these o.k.?
  47. Heads
  48. 883/1200 conversion leaking alittle oil middle of heads...
  49. New Voes?
  50. Need Help Identifying New Gaskets
  51. Oil Light
  52. Screaming Eagle or no Screaming Eagle ?
  53. 883 To 1200 Parts Se
  54. How to tell what heads/boring you have?
  55. why turn a brand new 883 into a 1200
  56. How Much Horespower???!!!!!!!!!
  57. wich cam do you recommend?
  58. Recent 1250 Conversion, Good or Bad?
  59. sportster engine swap??????
  60. 883 to 1200 conversion
  61. My NRHS 1250 Conversion...
  62. Clearance of piston pin??
  63. Engine Damage???
  64. which conversion
  65. Xena built - story inside!
  66. which cams??
  67. Xb head conversion
  68. 88 or 90?
  69. 1250 conversion
  70. Bought a new engine!!! What is it???
  71. heads
  72. Conversion ALMOST done...Need help with break-in RPMs
  73. 1200 R ignition module
  74. T-storm heads
  75. BadHabits Conversion FINALLY Done
  76. It's back!
  77. Hell Yeah!!!!
  78. What to expect ?
  79. Looking for info on Dyno Testing
  80. Converting my xl1200r to a 1250
  81. Just Started My 1250 Conversion
  82. '05 Screamin Eagle pipes on '00 engine?
  83. Wahoooo!
  84. conversion/top end
  85. WooHoo part deux
  86. unusual question
  87. 883R Build Up
  88. 1212 or 1250 ?
  89. Axtel cylinder wall thickness
  90. A Fairly useless tip.
  91. carb jetting after conversion
  92. Upgrading to 1330cc
  93. 93 883 ignition vs 1200 ignition?
  94. With what set of pipes do you run your modified Sporty ?
  95. Pulled the Trigger on 1250 kit
  96. My Sportster ran a 12.45 in the 1/4 mile
  97. Rigid_EVO Blown gasket after conversion (need advise)
  98. my 99" build
  99. Ebay 883 to 1200 conversion
  100. Is it a 1200 or 883 ??
  101. 883-1250 conversion and AC...
  102. Rigid_EVO Ign Cone adjustment
  103. New head gasket placed. Anything to do or don't do ?
  104. Same service manual for '99 as '95?
  105. PCIII or PCIII EX
  106. My new motor!!!
  107. Rigid_EVO Ignition Module download
  108. 883 to 1212 Conversion Finally Complete!!
  109. V-twin 883-1200?
  110. Easy way to adjust IGN cone module degrees with no tools?
  111. NRHS is closed for alittle while...
  112. Engine Covers
  113. Upgrade path for torque?
  114. Started my 1250 conversion - questions - NRHS is closed
  115. Cylinder liner after boring
  116. VOES 1.5" Performance Problems?
  117. Rubbermount_EVO Gas After Conversion
  118. Rubbermount_EVO Typical Labor Cost for Conversion
  119. Problems after NHRS conversion
  120. Rigid_EVO andrews cams???
  121. My Turn - Upgrade time
  122. Anyone directly had Nikasil problems???
  123. Point me to a good dyno tunner
  124. Rubbermount_EVO Here's what I want, what should I do?
  125. Rigid_EVO Oil drips like water from dip stick? Smells Like Gas?
  126. Rigid_EVO Cam Suggestion from Chart and head flow data?
  127. The path to conversion
  128. Full Rebuild Info
  129. EFI 883 to 1200 Conversion Questions
  130. EFI 883 to 1200 Conversion Questions
  131. Rubbermount_EVO 1212 or 1250 conversions exhaust question
  132. Dyno Tune (Detroit Area)
  133. Rigid_EVO Breather juice leakage usually worse after a conversion?
  134. Cost of conversion
  135. Old heads and cylinders
  136. Rigid_EVO 2003XL with 2005XB1200 Heads: BOLTS? TOP MOTOR MOUNTS?
  137. Rigid_EVO buell sportster conversion
  138. How does this combination sound (for now)?
  139. Let down
  140. post conversion
  141. Timing light...
  142. WTF, dealers?
  143. Rigid_EVO What About Break In?
  144. factory 1200 part numbers
  145. Rigid_EVO IGN upgrade, and headlight goes out a LOT...
  146. Transmission Gear Ratio's - Hot Street Poll
  147. Rubbermount_EVO Oil over full after ride, then drains down to normal level
  148. Cheers - Nrhs & Brians Bike Shop ! ! ! ! ! ! !
  149. 2008 883 sportser
  150. Rigid_EVO 95 883 conversion engine over too..
  151. Screaming Eagle EFI Conversion Kit
  152. Fuel overflow line
  153. 1250 conversion noise????
  154. bare heads?
  155. Rubbermount_EVO 1200 Conversion Pinging
  156. Rigid_EVO Anybody use Carls Cams?
  157. Ironhead Wanting to convert to 1200
  158. Idle after rebuild
  159. Nightster Engine Work, Feedback Needed!
  160. My Fellow Americans...
  161. Fuel question after rebuild
  162. 883 to 1200 conversion / what about sprockets size
  163. My conversion road
  164. Rigid_EVO How much power???
  165. Rigid_EVO ignition advice
  166. how big
  167. I think I screwed up with New Cam Install!
  168. Getting started
  169. 100"
  170. 1200 conversion
  171. noises per second
  172. Rigid_EVO Rubber mount exhaust on ridgid?
  173. Efi 883 to 1200 coversion
  174. Help, Need verification Cometic EST Gasket P/N
  175. 2003 1200cc $2400 upgrade
  176. 90 inch project - first dyno
  177. 883 to 1250 conversion
  178. EVO Thunderstorm engine similarities?
  179. Evo potential hp
  180. screamin eagle 883/1200 ?
  181. Conversion After Thoughts/Questions
  182. where to go on my reverse dome with pinging
  183. Rigid_EVO 03 883 xlr to 1200 conversion questions
  184. 100HP out of a 1200? how hard?
  185. 1250 kits
  186. Conversion ignition curve ?
  187. 1250 Kit questions...
  188. Required Reading
  189. sent off the jugs!!
  190. Buying an 07' 1200R, gonna do a 1250 kit......want opinions please....
  191. 02 883 to 1250 conversion
  192. Was it worth the $$$- 883 t0 1200
  193. Simplistic 883/1200 conversion
  194. Need help deciding
  195. Rigid_EVO Cam Prices
  196. It's heere!
  197. Rigid_EVO Push rod tubes leaking
  198. SE heads on way to NRHS....
  199. Is this NEW SE 1200 conversion any good??
  200. Have a killer deal on an 07' 883 on the table, need the EXPERTS to chime in please...
  201. edelbrock conversion
  202. 1250... what`s it like?
  203. 1200 Conversion Kit and Pipes
  204. 2004 vanilla conversion
  205. recommended clutch for 88 inch engines and up
  206. "Detuned" conversion exceeded expectations.
  207. Rigid_EVO SE conversion pistons
  208. Double check your parts guy!!! (or gal)
  209. Cam question.
  210. Rigid_EVO Buell s1 cams??
  211. Rigid_EVO 883 heads mated to buell pistons
  212. SCREAMIN’ EAGLE 883 to 1200 Conversion Kit
  213. Nows the time for an upgrade.
  214. Power Commander ?
  215. 883 stock head breathing capacity question
  216. Silly Noob questions
  217. It's Aliiiive!!
  218. This thing is AWESOME!
  219. Vanilla Conversion Holds it's Own.
  220. heads up from a lesson I learned
  221. Conversion starting issues.
  222. Noisey Rockers
  223. NRHS offer low compression 883/1200 pistons?
  224. for those who are lookin to upgrade here u go
  225. Dan does it again!!
  226. My winter project
  227. Rubbermount_EFI Screamin Eagle heads
  228. 1200cc conversion ??
  229. attaching oilhoses to oilpump.
  230. Rubbermount_EVO Total Cost Of Nrhs 1212 Swap??
  231. Rubbermount_EVO A Few Conversion Questions..
  232. Rigid_EVO Starting Conversion
  233. Hot Dock 4 valve XR heads
  234. voes or no voes for 88 or 90 inch?
  235. Help me decide!
  236. Rubbermount_EVO Can I go to 8,000 RPM
  237. I just need to from 70 to 80 faster.
  238. Difference between 86-03 and 04-09 cylinders?
  239. Starting the 1250 conversion
  240. Xbrr ( Rpm? )
  241. Big cylinders
  242. Big bore aluminum cylinders ( any good ? )
  243. Harley Big Bore Kits?
  244. Delkron cylinders??????
  245. SE vs. NRHS conversion
  246. pistons
  247. 1200 piston question
  248. Evolution Performance Bolt-On Big Bore Kit
  249. Manley 883/1200 "conversion" valves
  250. What is the diff between flat top and domed?