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  1. FZ-140 flooding
  2. Running in a new YS
  3. Difficult to start YS FZ115WS by electirc starter
  4. YS 91AC needle valve
  5. 110 fz sudden stop and compression on every stroke
  6. 53 available again?????
  7. How to buy YS FZ115-WS out of US?
  8. YS 140 fz flooding out
  9. Info about this YS please
  10. What is the fix for a rich mid range in a YS 120NC
  11. YS63FZ-S Valve Seats
  12. Valve retainer diameter
  13. Ys fz80 not available?
  14. ys 120 excessive smoke
  15. YS 140 DINGO how set the gap disc valve?
  16. YS 91 AC or new YS 80fz for Warbird Racing
  17. YS FZ 63 Low RPM
  18. YS91FZ, need help with the Regulator setting.
  19. 185 dz cdi - air in the fuel line between injector and throttle body
  20. DZ 170 Questions
  21. Ys 120 muffler thread
  22. ys63s quits running
  23. YS 185 Prop torque settings
  24. ys 63 metal sounds
  25. Need a little help sourcing a part
  26. YS 61 ar long stroke
  27. Dz140
  28. YS 115 flkooding
  29. New 80 four stroke???
  30. Ys 91fz
  31. YS63FZ-S quits in a maneuver
  32. YS 185 cdi zero surging going rich and back firing
  33. Engine size, Proppeller, RPM
  34. After run/storage oil for YS engines
  35. P51-d / ys 115ws or ys 140fz
  36. So what happened to YS (Yamada Mfg)?
  37. ys 120 fz...what prop size to use???
  38. YS 120 F compression
  39. YS FZ 53/70/80 S engines listed at YS Japan
  40. Ys 60 with macs tuned pipe
  41. Y.s. Fz120
  42. YS-120FS Rich Idle
  43. YS 63 won't go above 8,000 rpm
  44. older but seems to be in great shape ys 1.20 sputtering
  45. Drilling piston for
  46. YS 140 quits
  47. ys .45 2cycle
  48. YS FZ110S rebuilt - question on regulator
  49. re-assemble YS110s crankshaft into casing
  50. FZ110S bearings spec
  51. YS 185 won't throttle up.
  52. YS 170 DZ will not idle down
  53. Stuck valves
  54. YS DZ70 fuel draw problems....
  55. YS 175 CDI Negative Push engine dies out
  56. YS DZ70 - Air Bubbles in Fuel Injector Line
  57. Cue The Sombre Music
  58. Synthetic after run oil safe on silicone?
  59. Rear Bearing debris - New Crankcase?
  60. YS set up to run in reverse rotation for twin
  61. YF 120FZ - Valve cover Pressurized?
  62. This section is just a mine of information, thanks to all contributors
  63. Ys dz
  64. YS 53 squeaking
  65. YS 53 repaired
  66. Aluminum beam mount for YS 115
  67. Timing YS-FZ-140
  68. YS CDI ver. 2 - Power Source Selection
  69. YS F-120 RPM recommendations
  70. YS CDI Ver. 2 - RPM Telemetry
  71. Ys fz 91
  72. Ys 115fz s
  73. YS 61-S o-ring needle valve idle adjust
  74. 175FZ fuel system question
  75. us engine repair
  76. ys engine repair
  77. YS F-120 help... parts missing!
  78. YS 45 spare parts frustration
  79. Ys fz 110 prop nut
  80. Ys 61-s
  81. Ys fz63. Won't idle w/o glow igniter
  82. Ys fz63 won't idle without glow igniter
  83. Fz 120
  84. Check valve
  85. ys 110 not Guard low idel
  86. YS110s no response to throttle.
  87. greg bischof
  88. What Head Is This?
  89. I have a question about the DZ185 cdi.
  90. DZ160 Power Comparison
  91. Pulse 60 Saito 100 need more
  92. break in ys dz 170 cdi
  93. YS FZ70S vs DZ70S Difference?
  94. IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
  95. YS120AC needle valve question
  96. YS FZ110-S Muffler Adapter
  97. YS FZ 140 S Piston Damage.
  98. YS Fz63 disc valve and cylinder head valve sealing info needed
  99. YS 120AC piston design/failure?
  100. ys 63 fuel line pressure
  101. ys63 fuel consumpsion
  102. fz 63s mounting
  103. ys fz3s throttle arm
  104. YS 110S regulator tear down
  105. fuel dripping from carb on 120fz
  106. YS 115 problems
  107. FZ70-S : rotating the regulator
  108. Mid range stumble and dies
  109. Best , no compromise YsFZ140 exhaust setup?
  110. ys 70 pipe
  111. change the prop from 17x12 to 18.1x10
  112. .91 AC Mixture Problems
  113. YS170 fuel tank clunk & break-in
  114. YS50ST Head gasket dramas. need help!
  115. Ys175 cdi
  116. YS FZ 140 Sport Throttle Barrel Seizing
  117. YS 140L surging
  118. 140L compression
  119. ys fz 63 break in
  120. ys 160dz Question ?
  121. New YS Engine "Coming Soon"
  122. ys 170dz cam follower
  123. muffler for YS45FR
  124. When to replace YS bearings
  125. BYRON 30% Heli Fuel?
  126. YS 170 DZ Needle valve and regulator / low speed setting
  127. YS 170 prop - 4 blade?
  128. how do you stop syphoning
  129. to vibrate or not to vibrate...
  130. YS DZ 70
  131. YS45 on Arrow 40
  132. Seating New Bearings in a YS 61-R
  133. YS45FR won't start
  134. YS F120 exhaust port
  135. How do I remove the head from a YS 140L engine
  136. Max rpm for ys 120f sc
  137. New YS70
  138. where do i get this exhaust?
  139. ys170dz Fuel tank
  140. help with idle problem on 91AC
  141. ys 1.20 se ?
  142. ys 120 fs or ac ?
  143. 115FZ Crank re assembly
  144. YS DZ140
  145. Piston / Sleeve Clearance
  146. F120
  147. used 91 ST heli engine wont run
  148. 115S fuel consumption
  149. dz 160 engine problem
  150. Pre-buy inspection of YS140L
  151. YS 61 Long stroke fuel consumption
  152. YS 115 Muffler Header
  153. YS61-S
  154. Parts for YS .61 long stroke (rear ex)
  155. YS-63 Drive hub
  156. YSDZ 160 cam bearing removal from crankcase
  157. YS 175 CDI Nose Ring
  158. YS 63 overly rich regulator
  159. 120 decreasing rpm
  160. Muffler keeps loosening up
  161. fuel leaking out carb? 120fs
  162. 110 FZ pushrod tubes
  163. YS 70FZ 16-6 Prop?
  164. YS CDI RF interference
  165. YS-115 Rough on Idle
  166. YS 91AC CDI - Lubrication
  167. YS120SF Needs Help
  168. YS-FZ110 dies on idle only in flight
  169. YS 91AC
  170. YS115 wont start
  171. ys 91 ac question
  172. YS 170 regulator
  173. YS 70 loading up
  174. ys fz110 (not the s version)
  175. New YS 115s runs then dies over and over.
  176. help with YS info
  177. Identification of YS 120
  178. Y 140 no compression
  179. YS 120SF crankshaft questions
  180. FZ70 Disassembly
  181. Proper Service After 5yr Storage
  182. Ys fz70
  183. YS 160/170 to gasser?
  184. Ys FZ 110S, just want to make sure.
  185. ys 170 - shutting down
  186. YS F120 Crankshaft Confusion...explain ? ?
  187. dz160 stop in Loud noise
  188. 91 ac idle problem
  189. Badly running YS 63S
  190. Where are the 91FZ's??
  191. YS-120SF VS YS-120NC
  192. YS 110s problems
  193. YS Super Mount 3
  194. Is this muffler ok?
  195. 3 or 4 blade prop for ys fz 91?
  196. YS 140 Sport Idle Problems
  197. YS 140 Sport
  198. YS 115s and fuel consuption
  199. Wanted: YS 45 Carb. body
  200. F1.20 head replacement
  201. Question re smoke trail YSFZ 1.10
  202. YS 110s problem
  203. ys 91 4 stroke
  204. YS 120 No Pressure from Pump.
  205. yamada email
  206. Striped out muffler caseing
  207. YS 160DZ Help
  208. 160 vs 170 cdi much difference?
  209. YS Repair Facility
  210. Troubled YS110S
  211. Old YS.60 2S-need directions
  212. YS 1.40L sensitive needle
  213. New FZ-110s fuel problems
  214. .91 AC
  215. YS FZ 70S a few questions
  216. YS 110FZ throttle barrel setting
  217. Ys fz 91
  218. Dz 160 fuel pump prime
  219. YS .60/.61 two stroke parts source?
  220. 61 and 80 Heli engine Qs...
  221. 160 down on power
  222. PETEC - HELP with YS parts and service
  223. What fuel tank for FZ .91?
  224. YS Heli engines for Pattern?
  225. Aftermarket venturi for YS 170 ?
  226. YS 110S won't prime
  227. YS 170 CDI on low nitro
  228. 170 DZ
  229. 91AC fuel running out carb and exhaust
  230. Could not start NIB YS115S
  231. YS 115 Leaking airbox
  232. YSE0895 Exhaust Pipe Assembly for YS
  233. YS 110 Full throttle with carb closed
  234. To all YS CDI users
  235. YS 70 prop choice
  236. YS 170 CDI
  237. YX 140L sensitive needle
  238. Which ys 120 is this
  239. Canadian YS engines part retailer ??
  240. how hard I have to close the prop nut ,dz160
  241. Recalcitrant 160
  242. 140s problem
  243. YS170 Setting Up
  244. YS 120AC Dependability Maintenance and tweaks
  245. FZ115 fuel consumption
  246. YS 120 cams
  247. DZ170 Throttle Linkage
  248. YS 91 Pulsating Idle
  249. How to take out cylinder liner of DZ170 ?
  250. HS needle not change maximum rpm dz160