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  1. YS 91AC needle valve
  2. 110 fz sudden stop and compression on every stroke
  3. 53 available again?????
  4. How to buy YS FZ115-WS out of US?
  5. YS 140 fz flooding out
  6. Info about this YS please
  7. What is the fix for a rich mid range in a YS 120NC
  8. YS63FZ-S Valve Seats
  9. Valve retainer diameter
  10. Ys fz80 not available?
  11. ys 120 excessive smoke
  12. YS 140 DINGO how set the gap disc valve?
  13. YS 91 AC or new YS 80fz for Warbird Racing
  14. YS FZ 63 Low RPM
  15. YS91FZ, need help with the Regulator setting.
  16. 185 dz cdi - air in the fuel line between injector and throttle body
  17. DZ 170 Questions
  18. Ys 120 muffler thread
  19. ys63s quits running
  20. YS 185 Prop torque settings
  21. ys 63 metal sounds
  22. Need a little help sourcing a part
  23. YS 61 ar long stroke
  24. Dz140
  25. YS 115 flkooding
  26. New 80 four stroke???
  27. Ys 91fz
  28. YS63FZ-S quits in a maneuver
  29. YS 185 cdi zero surging going rich and back firing
  30. Engine size, Proppeller, RPM
  31. After run/storage oil for YS engines
  32. P51-d / ys 115ws or ys 140fz
  33. So what happened to YS (Yamada Mfg)?
  34. ys 120 fz...what prop size to use???
  35. YS 120 F compression
  36. YS FZ 53/70/80 S engines listed at YS Japan
  37. Ys 60 with macs tuned pipe
  38. Y.s. Fz120
  39. YS-120FS Rich Idle
  40. YS 63 won't go above 8,000 rpm
  41. older but seems to be in great shape ys 1.20 sputtering
  42. Drilling piston for
  43. YS 140 quits
  44. ys .45 2cycle
  45. YS FZ110S rebuilt - question on regulator
  46. re-assemble YS110s crankshaft into casing
  47. FZ110S bearings spec
  48. YS 185 won't throttle up.
  49. YS 170 DZ will not idle down
  50. Stuck valves
  51. YS DZ70 fuel draw problems....
  52. YS 175 CDI Negative Push engine dies out
  53. YS DZ70 - Air Bubbles in Fuel Injector Line
  54. Cue The Sombre Music
  55. Synthetic after run oil safe on silicone?
  56. Rear Bearing debris - New Crankcase?
  57. YS set up to run in reverse rotation for twin
  58. YF 120FZ - Valve cover Pressurized?
  59. This section is just a mine of information, thanks to all contributors
  60. Ys dz
  61. YS 53 squeaking
  62. YS 53 repaired
  63. Aluminum beam mount for YS 115
  64. Timing YS-FZ-140
  65. YS CDI ver. 2 - Power Source Selection
  66. YS F-120 RPM recommendations
  67. YS CDI Ver. 2 - RPM Telemetry
  68. Ys fz 91
  69. Ys 115fz s
  70. YS 61-S o-ring needle valve idle adjust
  71. 175FZ fuel system question
  72. us engine repair
  73. ys engine repair
  74. YS F-120 help... parts missing!
  75. YS 45 spare parts frustration
  76. Ys fz 110 prop nut
  77. Ys 61-s
  78. Ys fz63. Won't idle w/o glow igniter
  79. Ys fz63 won't idle without glow igniter
  80. Fz 120
  81. Check valve
  82. ys 110 not Guard low idel
  83. YS110s no response to throttle.
  84. greg bischof
  85. What Head Is This?
  86. I have a question about the DZ185 cdi.
  87. DZ160 Power Comparison
  88. Pulse 60 Saito 100 need more
  89. break in ys dz 170 cdi
  90. YS FZ70S vs DZ70S Difference?
  91. IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
  92. YS120AC needle valve question
  93. YS FZ110-S Muffler Adapter
  94. YS FZ 140 S Piston Damage.
  95. YS Fz63 disc valve and cylinder head valve sealing info needed
  96. YS 120AC piston design/failure?
  97. ys 63 fuel line pressure
  98. ys63 fuel consumpsion
  99. fz 63s mounting
  100. ys fz3s throttle arm
  101. YS 110S regulator tear down
  102. fuel dripping from carb on 120fz
  103. YS 115 problems
  104. FZ70-S : rotating the regulator
  105. Mid range stumble and dies
  106. Best , no compromise YsFZ140 exhaust setup?
  107. ys 70 pipe
  108. change the prop from 17x12 to 18.1x10
  109. .91 AC Mixture Problems
  110. YS170 fuel tank clunk & break-in
  111. YS50ST Head gasket dramas. need help!
  112. Ys175 cdi
  113. YS FZ 140 Sport Throttle Barrel Seizing
  114. YS 140L surging
  115. 140L compression
  116. ys fz 63 break in
  117. ys 160dz Question ?
  118. New YS Engine "Coming Soon"
  119. ys 170dz cam follower
  120. muffler for YS45FR
  121. When to replace YS bearings
  122. BYRON 30% Heli Fuel?
  123. YS 170 DZ Needle valve and regulator / low speed setting
  124. YS 170 prop - 4 blade?
  125. how do you stop syphoning
  126. to vibrate or not to vibrate...
  127. YS DZ 70
  128. YS45 on Arrow 40
  129. Seating New Bearings in a YS 61-R
  130. YS45FR won't start
  131. YS F120 exhaust port
  132. How do I remove the head from a YS 140L engine
  133. Max rpm for ys 120f sc
  134. New YS70
  135. where do i get this exhaust?
  136. ys170dz Fuel tank
  137. help with idle problem on 91AC
  138. ys 1.20 se ?
  139. ys 120 fs or ac ?
  140. 115FZ Crank re assembly
  141. YS DZ140
  142. Piston / Sleeve Clearance
  143. F120
  144. used 91 ST heli engine wont run
  145. 115S fuel consumption
  146. dz 160 engine problem
  147. Pre-buy inspection of YS140L
  148. YS 61 Long stroke fuel consumption
  149. YS 115 Muffler Header
  150. YS61-S
  151. Parts for YS .61 long stroke (rear ex)
  152. YS-63 Drive hub
  153. YSDZ 160 cam bearing removal from crankcase
  154. YS 175 CDI Nose Ring
  155. YS 63 overly rich regulator
  156. 120 decreasing rpm
  157. Muffler keeps loosening up
  158. fuel leaking out carb? 120fs
  159. 110 FZ pushrod tubes
  160. YS 70FZ 16-6 Prop?
  161. YS CDI RF interference
  162. YS-115 Rough on Idle
  163. YS 91AC CDI - Lubrication
  164. YS120SF Needs Help
  165. YS-FZ110 dies on idle only in flight
  166. YS 91AC
  167. YS115 wont start
  168. ys 91 ac question
  169. YS 170 regulator
  170. YS 70 loading up
  171. ys fz110 (not the s version)
  172. New YS 115s runs then dies over and over.
  173. help with YS info
  174. Identification of YS 120
  175. Y 140 no compression
  176. YS 120SF crankshaft questions
  177. FZ70 Disassembly
  178. Proper Service After 5yr Storage
  179. Ys fz70
  180. YS 160/170 to gasser?
  181. Ys FZ 110S, just want to make sure.
  182. ys 170 - shutting down
  183. YS F120 Crankshaft Confusion...explain ? ?
  184. dz160 stop in Loud noise
  185. 91 ac idle problem
  186. Badly running YS 63S
  187. Where are the 91FZ's??
  188. YS-120SF VS YS-120NC
  189. YS 110s problems
  190. YS Super Mount 3
  191. Is this muffler ok?
  192. 3 or 4 blade prop for ys fz 91?
  193. YS 140 Sport Idle Problems
  194. YS 140 Sport
  195. YS 115s and fuel consuption
  196. Wanted: YS 45 Carb. body
  197. F1.20 head replacement
  198. Question re smoke trail YSFZ 1.10
  199. YS 110s problem
  200. ys 91 4 stroke
  201. YS 120 No Pressure from Pump.
  202. yamada email
  203. Striped out muffler caseing
  204. YS 160DZ Help
  205. 160 vs 170 cdi much difference?
  206. YS Repair Facility
  207. Troubled YS110S
  208. Old YS.60 2S-need directions
  209. YS 1.40L sensitive needle
  210. New FZ-110s fuel problems
  211. .91 AC
  212. YS FZ 70S a few questions
  213. YS 110FZ throttle barrel setting
  214. Ys fz 91
  215. Dz 160 fuel pump prime
  216. YS .60/.61 two stroke parts source?
  217. 61 and 80 Heli engine Qs...
  218. 160 down on power
  219. PETEC - HELP with YS parts and service
  220. What fuel tank for FZ .91?
  221. YS Heli engines for Pattern?
  222. Aftermarket venturi for YS 170 ?
  223. YS 110S won't prime
  224. YS 170 CDI on low nitro
  225. 170 DZ
  226. 91AC fuel running out carb and exhaust
  227. Could not start NIB YS115S
  228. YS 115 Leaking airbox
  229. YSE0895 Exhaust Pipe Assembly for YS
  230. YS 110 Full throttle with carb closed
  231. To all YS CDI users
  232. YS 70 prop choice
  233. YS 170 CDI
  234. YX 140L sensitive needle
  235. Which ys 120 is this
  236. Canadian YS engines part retailer ??
  237. how hard I have to close the prop nut ,dz160
  238. Recalcitrant 160
  239. 140s problem
  240. YS170 Setting Up
  241. YS 120AC Dependability Maintenance and tweaks
  242. FZ115 fuel consumption
  243. YS 120 cams
  244. DZ170 Throttle Linkage
  245. YS 91 Pulsating Idle
  246. How to take out cylinder liner of DZ170 ?
  247. HS needle not change maximum rpm dz160
  248. prop apc 17x12w for dz 160
  249. fuel system problem with YS 140s
  250. Backplate HELP