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