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