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  1. Timing YS-FZ-140
  2. YS CDI ver. 2 - Power Source Selection
  3. YS F-120 RPM recommendations
  4. YS CDI Ver. 2 - RPM Telemetry
  5. Ys fz 91
  6. Ys 115fz s
  7. YS 61-S o-ring needle valve idle adjust
  8. 175FZ fuel system question
  9. us engine repair
  10. ys engine repair
  11. YS F-120 help... parts missing!
  12. YS 45 spare parts frustration
  13. Ys fz 110 prop nut
  14. Ys 61-s
  15. Ys fz63. Won't idle w/o glow igniter
  16. Ys fz63 won't idle without glow igniter
  17. Fz 120
  18. Check valve
  19. ys 110 not Guard low idel
  20. YS110s no response to throttle.
  21. greg bischof
  22. What Head Is This?
  23. I have a question about the DZ185 cdi.
  24. DZ160 Power Comparison
  25. Pulse 60 Saito 100 need more
  26. break in ys dz 170 cdi
  27. YS FZ70S vs DZ70S Difference?
  28. IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
  29. YS120AC needle valve question
  30. YS FZ110-S Muffler Adapter
  31. YS FZ 140 S Piston Damage.
  32. YS Fz63 disc valve and cylinder head valve sealing info needed
  33. YS 120AC piston design/failure?
  34. ys 63 fuel line pressure
  35. ys63 fuel consumpsion
  36. fz 63s mounting
  37. ys fz3s throttle arm
  38. YS 110S regulator tear down
  39. fuel dripping from carb on 120fz
  40. YS 115 problems
  41. FZ70-S : rotating the regulator
  42. Mid range stumble and dies
  43. Best , no compromise YsFZ140 exhaust setup?
  44. ys 70 pipe
  45. change the prop from 17x12 to 18.1x10
  46. .91 AC Mixture Problems
  47. YS170 fuel tank clunk & break-in
  48. YS50ST Head gasket dramas. need help!
  49. Ys175 cdi
  50. YS FZ 140 Sport Throttle Barrel Seizing
  51. YS 140L surging
  52. 140L compression
  53. ys fz 63 break in
  54. ys 160dz Question ?
  55. New YS Engine "Coming Soon"
  56. ys 170dz cam follower
  57. muffler for YS45FR
  58. When to replace YS bearings
  59. BYRON 30% Heli Fuel?
  60. YS 170 DZ Needle valve and regulator / low speed setting
  61. YS 170 prop - 4 blade?
  62. how do you stop syphoning
  63. to vibrate or not to vibrate...
  64. YS DZ 70
  65. YS45 on Arrow 40
  66. Seating New Bearings in a YS 61-R
  67. YS45FR won't start
  68. YS F120 exhaust port
  69. How do I remove the head from a YS 140L engine
  70. Max rpm for ys 120f sc
  71. New YS70
  72. where do i get this exhaust?
  73. ys170dz Fuel tank
  74. help with idle problem on 91AC
  75. ys 1.20 se ?
  76. ys 120 fs or ac ?
  77. 115FZ Crank re assembly
  78. YS DZ140
  79. Piston / Sleeve Clearance
  80. F120
  81. used 91 ST heli engine wont run
  82. 115S fuel consumption
  83. dz 160 engine problem
  84. Pre-buy inspection of YS140L
  85. YS 61 Long stroke fuel consumption
  86. YS 115 Muffler Header
  87. YS61-S
  88. Parts for YS .61 long stroke (rear ex)
  89. YS-63 Drive hub
  90. YSDZ 160 cam bearing removal from crankcase
  91. YS 175 CDI Nose Ring
  92. YS 63 overly rich regulator
  93. 120 decreasing rpm
  94. Muffler keeps loosening up
  95. fuel leaking out carb? 120fs
  96. 110 FZ pushrod tubes
  97. YS 70FZ 16-6 Prop?
  98. YS CDI RF interference
  99. YS-115 Rough on Idle
  100. YS 91AC CDI - Lubrication
  101. YS120SF Needs Help
  102. YS-FZ110 dies on idle only in flight
  103. YS 91AC
  104. YS115 wont start
  105. ys 91 ac question
  106. YS 170 regulator
  107. YS 70 loading up
  108. ys fz110 (not the s version)
  109. New YS 115s runs then dies over and over.
  110. help with YS info
  111. Identification of YS 120
  112. Y 140 no compression
  113. YS 120SF crankshaft questions
  114. FZ70 Disassembly
  115. Proper Service After 5yr Storage
  116. Ys fz70
  117. YS 160/170 to gasser?
  118. Ys FZ 110S, just want to make sure.
  119. ys 170 - shutting down
  120. YS F120 Crankshaft Confusion...explain ? ?
  121. dz160 stop in Loud noise
  122. 91 ac idle problem
  123. Badly running YS 63S
  124. Where are the 91FZ's??
  125. YS-120SF VS YS-120NC
  126. YS 110s problems
  127. YS Super Mount 3
  128. Is this muffler ok?
  129. 3 or 4 blade prop for ys fz 91?
  130. YS 140 Sport Idle Problems
  131. YS 140 Sport
  132. YS 115s and fuel consuption
  133. Wanted: YS 45 Carb. body
  134. F1.20 head replacement
  135. Question re smoke trail YSFZ 1.10
  136. YS 110s problem
  137. ys 91 4 stroke
  138. YS 120 No Pressure from Pump.
  139. yamada email
  140. Striped out muffler caseing
  141. YS 160DZ Help
  142. 160 vs 170 cdi much difference?
  143. YS Repair Facility
  144. Troubled YS110S
  145. Old YS.60 2S-need directions
  146. YS 1.40L sensitive needle
  147. New FZ-110s fuel problems
  148. .91 AC
  149. YS FZ 70S a few questions
  150. YS 110FZ throttle barrel setting
  151. Ys fz 91
  152. Dz 160 fuel pump prime
  153. YS .60/.61 two stroke parts source?
  154. 61 and 80 Heli engine Qs...
  155. 160 down on power
  156. PETEC - HELP with YS parts and service
  157. What fuel tank for FZ .91?
  158. YS Heli engines for Pattern?
  159. Aftermarket venturi for YS 170 ?
  160. YS 110S won't prime
  161. YS 170 CDI on low nitro
  162. 170 DZ
  163. 91AC fuel running out carb and exhaust
  164. Could not start NIB YS115S
  165. YS 115 Leaking airbox
  166. YSE0895 Exhaust Pipe Assembly for YS
  167. YS 110 Full throttle with carb closed
  168. To all YS CDI users
  169. YS 70 prop choice
  170. YS 170 CDI
  171. YX 140L sensitive needle
  172. Which ys 120 is this
  173. Canadian YS engines part retailer ??
  174. how hard I have to close the prop nut ,dz160
  175. Recalcitrant 160
  176. 140s problem
  177. YS170 Setting Up
  178. YS 120AC Dependability Maintenance and tweaks
  179. FZ115 fuel consumption
  180. YS 120 cams
  181. DZ170 Throttle Linkage
  182. YS 91 Pulsating Idle
  183. How to take out cylinder liner of DZ170 ?
  184. HS needle not change maximum rpm dz160
  185. prop apc 17x12w for dz 160
  186. fuel system problem with YS 140s
  187. Backplate HELP
  188. YS 115 strange idle
  189. Best Nitro/OIL/methanol combo for Fz 1.10
  190. YS 1.20 FZ HELP!!!!
  191. YS115
  192. Regulator direction
  193. YS Setup and Photos
  194. 120FZ and drop of fuel
  195. YS110 FZ prop
  196. YS 1.10 FZ trouble since repair
  197. YS63 tickover
  198. Changing ring in YS1.10
  199. how to fill
  200. YS 70 REAR BEARINGS
  201. Rules for Posting in the YS Forum (Please Read)
  202. YS 110fz lacks of power
  203. YS-175 CDI ?
  204. AFTERRUN OIL MISTAKE...
  205. Tips fpr YS90 and 110
  206. Inverted ys120
  207. Starting my YS 1.40L
  208. Something new in the works from YS
  209. YS Fuel
  210. ys 115
  211. When to replace the bearings
  212. ys63 slight problem
  213. 91AC vs 91FZ vs a 120 size 4 stroke
  214. Prop chunker
  215. Rapicon 30% 2C fuel for 160dz
  216. YS63FZ
  217. Oily mess
  218. Recommended tank size
  219. YS FZ110-S Problems
  220. YS 160 Re-assymbly Help
  221. Ys Super Mount 3
  222. Fuel tank pressure
  223. Cam timing on a YS 1.10
  224. YS FZ91 Throttle Arm Question
  225. 140 DZ wont run still
  226. YS140FZ has both valves stuck in open position
  227. where to send my ys 140 for service
  228. Loose Screws on a 140s valve cover
  229. New YS 140 Sport Leaking fuel out the carb
  230. YS 110FZ inverted dripps gas from carb can't tune
  231. How do you lap a YS valve
  232. YS F-120 Low Compression?
  233. YS 110 FZ
  234. YS63FZ will not go above idle
  235. YS91AC Slow to Pick Up Revs on Occasion
  236. YS-45 problem (pump?)
  237. Best Tuned pipe and Engine mount for YS long stroke 61
  238. Spares for YS61 FR
  239. Engine dies when reducuing power from 100%
  240. 91 AC Plunger woes
  241. YS FZ 110S Case Bronzing
  242. Fuel Dots?
  243. Fuel Dots?
  244. YS70
  245. YS 91 ST runing hot on the High end
  246. YS 91 AC -(H)heli parts differences?
  247. YS 110 Barrel seal
  248. YS110FZ compression problem
  249. Lost 91 AC muffler, any thread matches?
  250. Need Advice YS 140FZ

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