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  1. ys engine repair
  2. YS F-120 help... parts missing!
  3. YS 45 spare parts frustration
  4. Ys fz 110 prop nut
  5. Ys 61-s
  6. Ys fz63. Won't idle w/o glow igniter
  7. Ys fz63 won't idle without glow igniter
  8. Fz 120
  9. Check valve
  10. ys 110 not Guard low idel
  11. YS110s no response to throttle.
  12. greg bischof
  13. What Head Is This?
  14. I have a question about the DZ185 cdi.
  15. DZ160 Power Comparison
  16. Pulse 60 Saito 100 need more
  17. break in ys dz 170 cdi
  18. YS FZ70S vs DZ70S Difference?
  19. IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
  20. YS120AC needle valve question
  21. YS FZ110-S Muffler Adapter
  22. YS FZ 140 S Piston Damage.
  23. YS Fz63 disc valve and cylinder head valve sealing info needed
  24. YS 120AC piston design/failure?
  25. ys 63 fuel line pressure
  26. ys63 fuel consumpsion
  27. fz 63s mounting
  28. ys fz3s throttle arm
  29. YS 110S regulator tear down
  30. fuel dripping from carb on 120fz
  31. YS 115 problems
  32. FZ70-S : rotating the regulator
  33. Mid range stumble and dies
  34. Best , no compromise YsFZ140 exhaust setup?
  35. ys 70 pipe
  36. change the prop from 17x12 to 18.1x10
  37. .91 AC Mixture Problems
  38. YS170 fuel tank clunk & break-in
  39. YS50ST Head gasket dramas. need help!
  40. Ys175 cdi
  41. YS FZ 140 Sport Throttle Barrel Seizing
  42. YS 140L surging
  43. 140L compression
  44. ys fz 63 break in
  45. ys 160dz Question ?
  46. New YS Engine "Coming Soon"
  47. ys 170dz cam follower
  48. muffler for YS45FR
  49. When to replace YS bearings
  50. BYRON 30% Heli Fuel?
  51. YS 170 DZ Needle valve and regulator / low speed setting
  52. YS 170 prop - 4 blade?
  53. how do you stop syphoning
  54. to vibrate or not to vibrate...
  55. YS DZ 70
  56. YS45 on Arrow 40
  57. Seating New Bearings in a YS 61-R
  58. YS45FR won't start
  59. YS F120 exhaust port
  60. How do I remove the head from a YS 140L engine
  61. Max rpm for ys 120f sc
  62. New YS70
  63. where do i get this exhaust?
  64. ys170dz Fuel tank
  65. help with idle problem on 91AC
  66. ys 1.20 se ?
  67. ys 120 fs or ac ?
  68. 115FZ Crank re assembly
  69. YS DZ140
  70. Piston / Sleeve Clearance
  71. F120
  72. used 91 ST heli engine wont run
  73. 115S fuel consumption
  74. dz 160 engine problem
  75. Pre-buy inspection of YS140L
  76. YS 61 Long stroke fuel consumption
  77. YS 115 Muffler Header
  78. YS61-S
  79. Parts for YS .61 long stroke (rear ex)
  80. YS-63 Drive hub
  81. YSDZ 160 cam bearing removal from crankcase
  82. YS 175 CDI Nose Ring
  83. YS 63 overly rich regulator
  84. 120 decreasing rpm
  85. Muffler keeps loosening up
  86. fuel leaking out carb? 120fs
  87. 110 FZ pushrod tubes
  88. YS 70FZ 16-6 Prop?
  89. YS CDI RF interference
  90. YS-115 Rough on Idle
  91. YS 91AC CDI - Lubrication
  92. YS120SF Needs Help
  93. YS-FZ110 dies on idle only in flight
  94. YS 91AC
  95. YS115 wont start
  96. ys 91 ac question
  97. YS 170 regulator
  98. YS 70 loading up
  99. ys fz110 (not the s version)
  100. New YS 115s runs then dies over and over.
  101. help with YS info
  102. Identification of YS 120
  103. Y 140 no compression
  104. YS 120SF crankshaft questions
  105. FZ70 Disassembly
  106. Proper Service After 5yr Storage
  107. Ys fz70
  108. YS 160/170 to gasser?
  109. Ys FZ 110S, just want to make sure.
  110. ys 170 - shutting down
  111. YS F120 Crankshaft Confusion...explain ? ?
  112. dz160 stop in Loud noise
  113. 91 ac idle problem
  114. Badly running YS 63S
  115. Where are the 91FZ's??
  116. YS-120SF VS YS-120NC
  117. YS 110s problems
  118. YS Super Mount 3
  119. Is this muffler ok?
  120. 3 or 4 blade prop for ys fz 91?
  121. YS 140 Sport Idle Problems
  122. YS 140 Sport
  123. YS 115s and fuel consuption
  124. Wanted: YS 45 Carb. body
  125. F1.20 head replacement
  126. Question re smoke trail YSFZ 1.10
  127. YS 110s problem
  128. ys 91 4 stroke
  129. YS 120 No Pressure from Pump.
  130. yamada email
  131. Striped out muffler caseing
  132. YS 160DZ Help
  133. 160 vs 170 cdi much difference?
  134. YS Repair Facility
  135. Troubled YS110S
  136. Old YS.60 2S-need directions
  137. YS 1.40L sensitive needle
  138. New FZ-110s fuel problems
  139. .91 AC
  140. YS FZ 70S a few questions
  141. YS 110FZ throttle barrel setting
  142. Ys fz 91
  143. Dz 160 fuel pump prime
  144. YS .60/.61 two stroke parts source?
  145. 61 and 80 Heli engine Qs...
  146. 160 down on power
  147. PETEC - HELP with YS parts and service
  148. What fuel tank for FZ .91?
  149. YS Heli engines for Pattern?
  150. Aftermarket venturi for YS 170 ?
  151. YS 110S won't prime
  152. YS 170 CDI on low nitro
  153. 170 DZ
  154. 91AC fuel running out carb and exhaust
  155. Could not start NIB YS115S
  156. YS 115 Leaking airbox
  157. YSE0895 Exhaust Pipe Assembly for YS
  158. YS 110 Full throttle with carb closed
  159. To all YS CDI users
  160. YS 70 prop choice
  161. YS 170 CDI
  162. YX 140L sensitive needle
  163. Which ys 120 is this
  164. Canadian YS engines part retailer ??
  165. how hard I have to close the prop nut ,dz160
  166. Recalcitrant 160
  167. 140s problem
  168. YS170 Setting Up
  169. YS 120AC Dependability Maintenance and tweaks
  170. FZ115 fuel consumption
  171. YS 120 cams
  172. DZ170 Throttle Linkage
  173. YS 91 Pulsating Idle
  174. How to take out cylinder liner of DZ170 ?
  175. HS needle not change maximum rpm dz160
  176. prop apc 17x12w for dz 160
  177. fuel system problem with YS 140s
  178. Backplate HELP
  179. YS 115 strange idle
  180. Best Nitro/OIL/methanol combo for Fz 1.10
  181. YS 1.20 FZ HELP!!!!
  182. YS115
  183. Regulator direction
  184. YS Setup and Photos
  185. 120FZ and drop of fuel
  186. YS110 FZ prop
  187. YS 1.10 FZ trouble since repair
  188. YS63 tickover
  189. Changing ring in YS1.10
  190. how to fill
  191. YS 70 REAR BEARINGS
  192. Rules for Posting in the YS Forum (Please Read)
  193. YS 110fz lacks of power
  194. YS-175 CDI ?
  195. AFTERRUN OIL MISTAKE...
  196. Tips fpr YS90 and 110
  197. Inverted ys120
  198. Starting my YS 1.40L
  199. Something new in the works from YS
  200. YS Fuel
  201. ys 115
  202. When to replace the bearings
  203. ys63 slight problem
  204. 91AC vs 91FZ vs a 120 size 4 stroke
  205. Prop chunker
  206. Rapicon 30% 2C fuel for 160dz
  207. YS63FZ
  208. Oily mess
  209. Recommended tank size
  210. YS FZ110-S Problems
  211. YS 160 Re-assymbly Help
  212. Ys Super Mount 3
  213. Fuel tank pressure
  214. Cam timing on a YS 1.10
  215. YS FZ91 Throttle Arm Question
  216. 140 DZ wont run still
  217. YS140FZ has both valves stuck in open position
  218. where to send my ys 140 for service
  219. Loose Screws on a 140s valve cover
  220. New YS 140 Sport Leaking fuel out the carb
  221. YS 110FZ inverted dripps gas from carb can't tune
  222. How do you lap a YS valve
  223. YS F-120 Low Compression?
  224. YS 110 FZ
  225. YS63FZ will not go above idle
  226. YS91AC Slow to Pick Up Revs on Occasion
  227. YS-45 problem (pump?)
  228. Best Tuned pipe and Engine mount for YS long stroke 61
  229. Spares for YS61 FR
  230. Engine dies when reducuing power from 100%
  231. 91 AC Plunger woes
  232. YS FZ 110S Case Bronzing
  233. Fuel Dots?
  234. Fuel Dots?
  235. YS70
  236. YS 91 ST runing hot on the High end
  237. YS 91 AC -(H)heli parts differences?
  238. YS 110 Barrel seal
  239. YS110FZ compression problem
  240. Lost 91 AC muffler, any thread matches?
  241. Need Advice YS 140FZ
  242. YS 140FZ idle RPM changes
  243. YS170 Maintenance
  244. YS170cdi conrod again
  245. Hatori Flex header for YS engines
  246. YS 140DZ and 160DZ exhaust header interchangeability
  247. YS 120 manual
  248. YS 160/170 pump question
  249. ys 140 is a 140L or a 140 FZ
  250. Fuel Pump ... principle.

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