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  1. YS 91 AC or new YS 80fz for Warbird Racing
  2. YS FZ 63 Low RPM
  3. YS91FZ, need help with the Regulator setting.
  4. 185 dz cdi - air in the fuel line between injector and throttle body
  5. DZ 170 Questions
  6. Ys 120 muffler thread
  7. ys63s quits running
  8. YS 185 Prop torque settings
  9. ys 63 metal sounds
  10. Need a little help sourcing a part
  11. YS 61 ar long stroke
  12. Dz140
  13. YS 115 flkooding
  14. New 80 four stroke???
  15. Ys 91fz
  16. YS63FZ-S quits in a maneuver
  17. YS 185 cdi zero surging going rich and back firing
  18. Engine size, Proppeller, RPM
  19. After run/storage oil for YS engines
  20. P51-d / ys 115ws or ys 140fz
  21. So what happened to YS (Yamada Mfg)?
  22. ys 120 fz...what prop size to use???
  23. YS 120 F compression
  24. YS FZ 53/70/80 S engines listed at YS Japan
  25. Ys 60 with macs tuned pipe
  26. Y.s. Fz120
  27. YS-120FS Rich Idle
  28. YS 63 won't go above 8,000 rpm
  29. older but seems to be in great shape ys 1.20 sputtering
  30. Drilling piston for
  31. YS 140 quits
  32. ys .45 2cycle
  33. YS FZ110S rebuilt - question on regulator
  34. re-assemble YS110s crankshaft into casing
  35. FZ110S bearings spec
  36. YS 185 won't throttle up.
  37. YS 170 DZ will not idle down
  38. Stuck valves
  39. YS DZ70 fuel draw problems....
  40. YS 175 CDI Negative Push engine dies out
  41. YS DZ70 - Air Bubbles in Fuel Injector Line
  42. Cue The Sombre Music
  43. Synthetic after run oil safe on silicone?
  44. Rear Bearing debris - New Crankcase?
  45. YS set up to run in reverse rotation for twin
  46. YF 120FZ - Valve cover Pressurized?
  47. This section is just a mine of information, thanks to all contributors
  48. Ys dz
  49. YS 53 squeaking
  50. YS 53 repaired
  51. Aluminum beam mount for YS 115
  52. Timing YS-FZ-140
  53. YS CDI ver. 2 - Power Source Selection
  54. YS F-120 RPM recommendations
  55. YS CDI Ver. 2 - RPM Telemetry
  56. Ys fz 91
  57. Ys 115fz s
  58. YS 61-S o-ring needle valve idle adjust
  59. 175FZ fuel system question
  60. us engine repair
  61. ys engine repair
  62. YS F-120 help... parts missing!
  63. YS 45 spare parts frustration
  64. Ys fz 110 prop nut
  65. Ys 61-s
  66. Ys fz63. Won't idle w/o glow igniter
  67. Ys fz63 won't idle without glow igniter
  68. Fz 120
  69. Check valve
  70. ys 110 not Guard low idel
  71. YS110s no response to throttle.
  72. greg bischof
  73. What Head Is This?
  74. I have a question about the DZ185 cdi.
  75. DZ160 Power Comparison
  76. Pulse 60 Saito 100 need more
  77. break in ys dz 170 cdi
  78. YS FZ70S vs DZ70S Difference?
  79. IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
  80. YS120AC needle valve question
  81. YS FZ110-S Muffler Adapter
  82. YS FZ 140 S Piston Damage.
  83. YS Fz63 disc valve and cylinder head valve sealing info needed
  84. YS 120AC piston design/failure?
  85. ys 63 fuel line pressure
  86. ys63 fuel consumpsion
  87. fz 63s mounting
  88. ys fz3s throttle arm
  89. YS 110S regulator tear down
  90. fuel dripping from carb on 120fz
  91. YS 115 problems
  92. FZ70-S : rotating the regulator
  93. Mid range stumble and dies
  94. Best , no compromise YsFZ140 exhaust setup?
  95. ys 70 pipe
  96. change the prop from 17x12 to 18.1x10
  97. .91 AC Mixture Problems
  98. YS170 fuel tank clunk & break-in
  99. YS50ST Head gasket dramas. need help!
  100. Ys175 cdi
  101. YS FZ 140 Sport Throttle Barrel Seizing
  102. YS 140L surging
  103. 140L compression
  104. ys fz 63 break in
  105. ys 160dz Question ?
  106. New YS Engine "Coming Soon"
  107. ys 170dz cam follower
  108. muffler for YS45FR
  109. When to replace YS bearings
  110. BYRON 30% Heli Fuel?
  111. YS 170 DZ Needle valve and regulator / low speed setting
  112. YS 170 prop - 4 blade?
  113. how do you stop syphoning
  114. to vibrate or not to vibrate...
  115. YS DZ 70
  116. YS45 on Arrow 40
  117. Seating New Bearings in a YS 61-R
  118. YS45FR won't start
  119. YS F120 exhaust port
  120. How do I remove the head from a YS 140L engine
  121. Max rpm for ys 120f sc
  122. New YS70
  123. where do i get this exhaust?
  124. ys170dz Fuel tank
  125. help with idle problem on 91AC
  126. ys 1.20 se ?
  127. ys 120 fs or ac ?
  128. 115FZ Crank re assembly
  129. YS DZ140
  130. Piston / Sleeve Clearance
  131. F120
  132. used 91 ST heli engine wont run
  133. 115S fuel consumption
  134. dz 160 engine problem
  135. Pre-buy inspection of YS140L
  136. YS 61 Long stroke fuel consumption
  137. YS 115 Muffler Header
  138. YS61-S
  139. Parts for YS .61 long stroke (rear ex)
  140. YS-63 Drive hub
  141. YSDZ 160 cam bearing removal from crankcase
  142. YS 175 CDI Nose Ring
  143. YS 63 overly rich regulator
  144. 120 decreasing rpm
  145. Muffler keeps loosening up
  146. fuel leaking out carb? 120fs
  147. 110 FZ pushrod tubes
  148. YS 70FZ 16-6 Prop?
  149. YS CDI RF interference
  150. YS-115 Rough on Idle
  151. YS 91AC CDI - Lubrication
  152. YS120SF Needs Help
  153. YS-FZ110 dies on idle only in flight
  154. YS 91AC
  155. YS115 wont start
  156. ys 91 ac question
  157. YS 170 regulator
  158. YS 70 loading up
  159. ys fz110 (not the s version)
  160. New YS 115s runs then dies over and over.
  161. help with YS info
  162. Identification of YS 120
  163. Y 140 no compression
  164. YS 120SF crankshaft questions
  165. FZ70 Disassembly
  166. Proper Service After 5yr Storage
  167. Ys fz70
  168. YS 160/170 to gasser?
  169. Ys FZ 110S, just want to make sure.
  170. ys 170 - shutting down
  171. YS F120 Crankshaft Confusion...explain ? ?
  172. dz160 stop in Loud noise
  173. 91 ac idle problem
  174. Badly running YS 63S
  175. Where are the 91FZ's??
  176. YS-120SF VS YS-120NC
  177. YS 110s problems
  178. YS Super Mount 3
  179. Is this muffler ok?
  180. 3 or 4 blade prop for ys fz 91?
  181. YS 140 Sport Idle Problems
  182. YS 140 Sport
  183. YS 115s and fuel consuption
  184. Wanted: YS 45 Carb. body
  185. F1.20 head replacement
  186. Question re smoke trail YSFZ 1.10
  187. YS 110s problem
  188. ys 91 4 stroke
  189. YS 120 No Pressure from Pump.
  190. yamada email
  191. Striped out muffler caseing
  192. YS 160DZ Help
  193. 160 vs 170 cdi much difference?
  194. YS Repair Facility
  195. Troubled YS110S
  196. Old YS.60 2S-need directions
  197. YS 1.40L sensitive needle
  198. New FZ-110s fuel problems
  199. .91 AC
  200. YS FZ 70S a few questions
  201. YS 110FZ throttle barrel setting
  202. Ys fz 91
  203. Dz 160 fuel pump prime
  204. YS .60/.61 two stroke parts source?
  205. 61 and 80 Heli engine Qs...
  206. 160 down on power
  207. PETEC - HELP with YS parts and service
  208. What fuel tank for FZ .91?
  209. YS Heli engines for Pattern?
  210. Aftermarket venturi for YS 170 ?
  211. YS 110S won't prime
  212. YS 170 CDI on low nitro
  213. 170 DZ
  214. 91AC fuel running out carb and exhaust
  215. Could not start NIB YS115S
  216. YS 115 Leaking airbox
  217. YSE0895 Exhaust Pipe Assembly for YS
  218. YS 110 Full throttle with carb closed
  219. To all YS CDI users
  220. YS 70 prop choice
  221. YS 170 CDI
  222. YX 140L sensitive needle
  223. Which ys 120 is this
  224. Canadian YS engines part retailer ??
  225. how hard I have to close the prop nut ,dz160
  226. Recalcitrant 160
  227. 140s problem
  228. YS170 Setting Up
  229. YS 120AC Dependability Maintenance and tweaks
  230. FZ115 fuel consumption
  231. YS 120 cams
  232. DZ170 Throttle Linkage
  233. YS 91 Pulsating Idle
  234. How to take out cylinder liner of DZ170 ?
  235. HS needle not change maximum rpm dz160
  236. prop apc 17x12w for dz 160
  237. fuel system problem with YS 140s
  238. Backplate HELP
  239. YS 115 strange idle
  240. Best Nitro/OIL/methanol combo for Fz 1.10
  241. YS 1.20 FZ HELP!!!!
  242. YS115
  243. Regulator direction
  244. YS Setup and Photos
  245. 120FZ and drop of fuel
  246. YS110 FZ prop
  247. YS 1.10 FZ trouble since repair
  248. YS63 tickover
  249. Changing ring in YS1.10
  250. how to fill