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  1. Propeller choice for 115S
  2. YS Newbie Exhaust Question
  3. YS direct 80, 115 Mufflers
  4. DZ 200 CDI NEW, Problem in mid rang
  5. YS 140L wont throttle up
  6. Request for update
  7. YS 110 dripping fuel from air chamber
  8. Black oil from Hatori tuned muffler
  9. About factory setting for "low speed needle valve" of YS115WS
  10. YS FZ-175s Tuning
  11. YS 110S Tuning
  12. DZ 160 cdi flooded crankcase?
  13. What's difference between YS185DZ and YS175FZ
  14. YS 63S Surges Above Half Throttle
  15. DZ160 won't shut down
  16. FZ-140 flooding
  17. Running in a new YS
  18. Difficult to start YS FZ115WS by electirc starter
  19. YS 91AC needle valve
  20. 110 fz sudden stop and compression on every stroke
  21. 53 available again?????
  22. How to buy YS FZ115-WS out of US?
  23. YS 140 fz flooding out
  24. Info about this YS please
  25. What is the fix for a rich mid range in a YS 120NC
  26. YS63FZ-S Valve Seats
  27. Valve retainer diameter
  28. Ys fz80 not available?
  29. ys 120 excessive smoke
  30. YS 140 DINGO how set the gap disc valve?
  31. YS 91 AC or new YS 80fz for Warbird Racing
  32. YS FZ 63 Low RPM
  33. YS91FZ, need help with the Regulator setting.
  34. 185 dz cdi - air in the fuel line between injector and throttle body
  35. DZ 170 Questions
  36. Ys 120 muffler thread
  37. ys63s quits running
  38. YS 185 Prop torque settings
  39. ys 63 metal sounds
  40. Need a little help sourcing a part
  41. YS 61 ar long stroke
  42. Dz140
  43. YS 115 flkooding
  44. New 80 four stroke???
  45. Ys 91fz
  46. YS63FZ-S quits in a maneuver
  47. YS 185 cdi zero surging going rich and back firing
  48. Engine size, Proppeller, RPM
  49. After run/storage oil for YS engines
  50. P51-d / ys 115ws or ys 140fz
  51. So what happened to YS (Yamada Mfg)?
  52. ys 120 fz...what prop size to use???
  53. YS 120 F compression
  54. YS FZ 53/70/80 S engines listed at YS Japan
  55. Ys 60 with macs tuned pipe
  56. Y.s. Fz120
  57. YS-120FS Rich Idle
  58. YS 63 won't go above 8,000 rpm
  59. older but seems to be in great shape ys 1.20 sputtering
  60. Drilling piston for
  61. YS 140 quits
  62. ys .45 2cycle
  63. YS FZ110S rebuilt - question on regulator
  64. re-assemble YS110s crankshaft into casing
  65. FZ110S bearings spec
  66. YS 185 won't throttle up.
  67. YS 170 DZ will not idle down
  68. Stuck valves
  69. YS DZ70 fuel draw problems....
  70. YS 175 CDI Negative Push engine dies out
  71. YS DZ70 - Air Bubbles in Fuel Injector Line
  72. Cue The Sombre Music
  73. Synthetic after run oil safe on silicone?
  74. Rear Bearing debris - New Crankcase?
  75. YS set up to run in reverse rotation for twin
  76. YF 120FZ - Valve cover Pressurized?
  77. This section is just a mine of information, thanks to all contributors
  78. Ys dz
  79. YS 53 squeaking
  80. YS 53 repaired
  81. Aluminum beam mount for YS 115
  82. Timing YS-FZ-140
  83. YS CDI ver. 2 - Power Source Selection
  84. YS F-120 RPM recommendations
  85. YS CDI Ver. 2 - RPM Telemetry
  86. Ys fz 91
  87. Ys 115fz s
  88. YS 61-S o-ring needle valve idle adjust
  89. 175FZ fuel system question
  90. us engine repair
  91. ys engine repair
  92. YS F-120 help... parts missing!
  93. YS 45 spare parts frustration
  94. Ys fz 110 prop nut
  95. Ys 61-s
  96. Ys fz63. Won't idle w/o glow igniter
  97. Ys fz63 won't idle without glow igniter
  98. Fz 120
  99. Check valve
  100. ys 110 not Guard low idel
  101. YS110s no response to throttle.
  102. greg bischof
  103. What Head Is This?
  104. I have a question about the DZ185 cdi.
  105. DZ160 Power Comparison
  106. Pulse 60 Saito 100 need more
  107. break in ys dz 170 cdi
  108. YS FZ70S vs DZ70S Difference?
  109. IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
  110. YS120AC needle valve question
  111. YS FZ110-S Muffler Adapter
  112. YS FZ 140 S Piston Damage.
  113. YS Fz63 disc valve and cylinder head valve sealing info needed
  114. YS 120AC piston design/failure?
  115. ys 63 fuel line pressure
  116. ys63 fuel consumpsion
  117. fz 63s mounting
  118. ys fz3s throttle arm
  119. YS 110S regulator tear down
  120. fuel dripping from carb on 120fz
  121. YS 115 problems
  122. FZ70-S : rotating the regulator
  123. Mid range stumble and dies
  124. Best , no compromise YsFZ140 exhaust setup?
  125. ys 70 pipe
  126. change the prop from 17x12 to 18.1x10
  127. .91 AC Mixture Problems
  128. YS170 fuel tank clunk & break-in
  129. YS50ST Head gasket dramas. need help!
  130. Ys175 cdi
  131. YS FZ 140 Sport Throttle Barrel Seizing
  132. YS 140L surging
  133. 140L compression
  134. ys fz 63 break in
  135. ys 160dz Question ?
  136. New YS Engine "Coming Soon"
  137. ys 170dz cam follower
  138. muffler for YS45FR
  139. When to replace YS bearings
  140. BYRON 30% Heli Fuel?
  141. YS 170 DZ Needle valve and regulator / low speed setting
  142. YS 170 prop - 4 blade?
  143. how do you stop syphoning
  144. to vibrate or not to vibrate...
  145. YS DZ 70
  146. YS45 on Arrow 40
  147. Seating New Bearings in a YS 61-R
  148. YS45FR won't start
  149. YS F120 exhaust port
  150. How do I remove the head from a YS 140L engine
  151. Max rpm for ys 120f sc
  152. New YS70
  153. where do i get this exhaust?
  154. ys170dz Fuel tank
  155. help with idle problem on 91AC
  156. ys 1.20 se ?
  157. ys 120 fs or ac ?
  158. 115FZ Crank re assembly
  159. YS DZ140
  160. Piston / Sleeve Clearance
  161. F120
  162. used 91 ST heli engine wont run
  163. 115S fuel consumption
  164. dz 160 engine problem
  165. Pre-buy inspection of YS140L
  166. YS 61 Long stroke fuel consumption
  167. YS 115 Muffler Header
  168. YS61-S
  169. Parts for YS .61 long stroke (rear ex)
  170. YS-63 Drive hub
  171. YSDZ 160 cam bearing removal from crankcase
  172. YS 175 CDI Nose Ring
  173. YS 63 overly rich regulator
  174. 120 decreasing rpm
  175. Muffler keeps loosening up
  176. fuel leaking out carb? 120fs
  177. 110 FZ pushrod tubes
  178. YS 70FZ 16-6 Prop?
  179. YS CDI RF interference
  180. YS-115 Rough on Idle
  181. YS 91AC CDI - Lubrication
  182. YS120SF Needs Help
  183. YS-FZ110 dies on idle only in flight
  184. YS 91AC
  185. YS115 wont start
  186. ys 91 ac question
  187. YS 170 regulator
  188. YS 70 loading up
  189. ys fz110 (not the s version)
  190. New YS 115s runs then dies over and over.
  191. help with YS info
  192. Identification of YS 120
  193. Y 140 no compression
  194. YS 120SF crankshaft questions
  195. FZ70 Disassembly
  196. Proper Service After 5yr Storage
  197. Ys fz70
  198. YS 160/170 to gasser?
  199. Ys FZ 110S, just want to make sure.
  200. ys 170 - shutting down
  201. YS F120 Crankshaft Confusion...explain ? ?
  202. dz160 stop in Loud noise
  203. 91 ac idle problem
  204. Badly running YS 63S
  205. Where are the 91FZ's??
  206. YS-120SF VS YS-120NC
  207. YS 110s problems
  208. YS Super Mount 3
  209. Is this muffler ok?
  210. 3 or 4 blade prop for ys fz 91?
  211. YS 140 Sport Idle Problems
  212. YS 140 Sport
  213. YS 115s and fuel consuption
  214. Wanted: YS 45 Carb. body
  215. F1.20 head replacement
  216. Question re smoke trail YSFZ 1.10
  217. YS 110s problem
  218. ys 91 4 stroke
  219. YS 120 No Pressure from Pump.
  220. yamada email
  221. Striped out muffler caseing
  222. YS 160DZ Help
  223. 160 vs 170 cdi much difference?
  224. YS Repair Facility
  225. Troubled YS110S
  226. Old YS.60 2S-need directions
  227. YS 1.40L sensitive needle
  228. New FZ-110s fuel problems
  229. .91 AC
  230. YS FZ 70S a few questions
  231. YS 110FZ throttle barrel setting
  232. Ys fz 91
  233. Dz 160 fuel pump prime
  234. YS .60/.61 two stroke parts source?
  235. 61 and 80 Heli engine Qs...
  236. 160 down on power
  237. PETEC - HELP with YS parts and service
  238. What fuel tank for FZ .91?
  239. YS Heli engines for Pattern?
  240. Aftermarket venturi for YS 170 ?
  241. YS 110S won't prime
  242. YS 170 CDI on low nitro
  243. 170 DZ
  244. 91AC fuel running out carb and exhaust
  245. Could not start NIB YS115S
  246. YS 115 Leaking airbox
  247. YSE0895 Exhaust Pipe Assembly for YS
  248. YS 110 Full throttle with carb closed
  249. To all YS CDI users
  250. YS 70 prop choice