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View Full Version : Engines and Mufflers

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  1. Types of fuel
  2. Troube w/ my Hyper 50
  3. Hatori SB-18 on YS 91?
  4. OS 91 Parts needed
  5. OS 91 Carb question
  6. What of three fuel?
  7. Umm, which OS 90???
  8. Funtech A170 muffler on Evo 50
  9. Question about an OS 60B carb
  10. OS.91-SZ (non pumped) Needle Settings
  11. OS91 C-Spec PS leaning
  12. Breaking IN?
  13. OS 91 SZ, Fuel wont go into the carb.
  14. Anything wrong with this engine
  15. Which engine to get-OS91SZ Hyper or YS91??
  16. OS 91szh-ps mod
  17. YS 60 motor rant
  18. Engine Life
  19. OS91SZ-H PS Idle problem ...
  20. Best Hatori muffler for YS ST2?
  21. Loctite on the Hatori FH mount?
  22. tt 36
  23. Muffler Weights
  24. New YS91 unstable idle
  25. going to get a os 91, what will i need to get for hard 3d?