- ys 120 fs opinion
- YS 120 FZ Problems
- Dz Bench Run
- Dave - Can you tell me the status of my engine?
- YS .63 Start?
- DZ questions
- YS check valve access in a cowling..
- YS63 Muffler
- YS63 still having midrange problems
- 140L Imac prop
- For Dave, How to Store
- YS 140 DZ soft mount ? (Dave)
- Ys Fz110
- 140dz fuel/oil question for clarification
- For Dave - Best After Run Oil For Dz?
- Ys 120sf
- fuel regulators
- YS53 Crank Broke
- Storage for a 63
- Ys .45 SE gaskets
- ys91ac will not idle
- Please read before posting...
- YS 120 fz trouble
- YS91 and a 3-blade prop
- More on the YS 140DZ
- Bubbles in fuel line from regulator YS 63 & 91
- .63 problems
- 140L Prop.
- Will the DZ be happy with large low pitch props?
- 15% vrs30% heli fuel in 140DZ
- New 140DZ Questions
- YS low-end frustration
- Ys 80
- For Dave: 20% Nitro Vs 30% Nitro In Dz
- Need help with my new YS91 Heli
- YS 91 Fuel question
- New YS 91 AC - Initial set-up and run in
- For Dave - Have You Tried The Magnum Dz Fuel
- YS63 power output
- YS63 Idle Issue
- Prop comes loose on YS120SF
- Back Plate Mounts
- Why the 140 Sport?
- Which YS engine most suitable?
- Question
- Why was gone YS FZ53 with pages http: // www.ysperformance.com/???
- gasket question
- YS63 midrange problems.
- F-120 fuel lines
- New Magnum blended fuel for the YS140DZ
- Question for Dave
- Ys Engine Suffixes
- Q:Can't stop a 91fz
- Webra 40/50 Ultrathrust
- Fuel from Morgan for the new DIngo
- Motor Suggestion
- Ys140dz Service History
- YS140L Box
- Install YS120SC in Pitts Special
- What REAL Operating Range(RPM) YS 63FZ????
- YS 91 FZ quiting in mid range
- Where can i buy YS engines stickers??
- Ys 60 Fr
- Ys 63 hand starting?
- 3-blade prop for YS120NC
- Engine Servicing By Ys
- looking for a good book
- ys 91ac no power
- YS .63 problems
- YS 91FZ Leaking?
- ys 91 ac
- YS91 CAD file
- New fuel for the Dingo 140
- ys63 tach readings
- Surging .91fz
- Supplier fo YS engines? Can't find one.
- YS 63 on Profile Planes ?
- YS Fuel
- YS30 Heli & YS50
- New 120FZ Problem
- Hard starting inverted 91AC
- Dave second request:confused: YS Storage for a long winter nap
- New YS 91 FZ user
- YS FZ 91 Counter-rotating
- Emptying tank on 91FZ
- YS 140 tuning
- Instruction Manual for YS FZ120?
- 140 L or 140 FZ
- YS 140L woes
- YS 120 FS runs great, just hard to get idle set
- YS 120 FS takes awile for fuel to reach carb.
- ys91 heli engine
- 91ac Nib
- Need Help My Ys 91 Git Sand And Dirt In It
- YS63 air bubble problem
- Yellow Aircraft Spitfire, Is the YS140L the correct engine?
- YS 53, problem!
- YS Valve cover
- 120SF Needle Valve Setting
- Old YS120 FS - rear bearing problem, I think...
- YS 1.40L vs. YS 1.40Sport
- Erratic Running YS53
- Is It Too Lean??????
- YS 1.20 fuel leak problem
- YS 91 AC going lean
- Need some help Dave
- YS .91AC needs overhaul
- YS 45 Fuel delivery problems
- 91fz problem for Dave
- YS Check Valve
- J'tec Snuf-vibe Mount
- YS 140 L Hard mounted ok ?
- YS 91AC problem
- Is YS91AC-H 4 stroke good for a heli?
- Ys F-120 Ac
- YS .91AC diaphram setting
- 120 ac runs flat
- castor in fuel?
- Ys 53 Muffler Problem ?????
- B rand new 140DZ blown head gasket
- .45 RE break in
- YS 91AC -- Surging
- ys 45 plug?
- Trouble with a header pipe on a 140-l
- YS91 question
- Hyde soft mounts
- YS 91 pumper
- FZ-53 Compression
- YS 120ac prop selection
- Ys140 Dz
- .45 RE Fuel?
- YS63 mid-range
- ST3 Not idling
- YS 120 FZ Discontinuation
- YS63 RPMs loss
- Ys140dz
- YS63 needs TLC
- YS 120 FZ Engine Trouble
- Ys 91ac ??
- Ys-63 Part # Question
- YS 63 problems
- YS FZ63 performance / High Oil Content
- Fuel hookup for YZ 63
- Difference between 120SF & 120NC
- Ys 63 Trouble
- manual for YS1.20 FZ
- YS 53/63 Hatori Exhaust
- Ys 63 ??
- YS 63 whats going on? (Thanks Dave!)
- YS 91 AC question
- YS91 rough idle
- Running a YS140L open exhaust...
- Where to get valve guages?
- Header only
- YS 120 FZ, 140 DZ, or 140 Sport
- ys 120f please help....
- FZ91 Quits on final?
- Dave helps us out here please...
- Y.S. 140 question
- prop shaft extensions Y.S.91
- 91FZ idle setting?
- YS91FZ, a little trouble.
- YS63 Baffler or muffler
- YS 91 AC troubles
- Best prop for YS 140 L, and first start ?
- 140L reg all the way in
- Y.S. Piston Gas Port Modification
- YS 61 STii
- Ys 91 vent line installation
- YS 60 Fuel Hookup
- check valve
- Y S 53 engine runs poorly
- 91 AC goes lean on idle
- Any New 2 Stokes Coming Out
- YS 140 L....running question...!
- Ys-110?
- Am I wasting fuel with the DZ on the bench?
- YS 63 repair Bill
- Do I need this part?
- @)(&*%)@$& YS63 4-c
- Did I do it right? (FZ63)
- YS 91 AC Trouble again?????
- ys 120fz
- YS Parts
- Need help w/ YS 63
- Help Dave! 120SF Surging
- Ys 140 fz
- YS 53 is worse than when I sent in!
- YS 61 w/pitts
- Diaphram for the 120 and 91AC
- YS Service
- YS63 lean condition on idle
- YS 91AC Question
- Is the YS80 ST2 a
- YS Engine afterrun oil?
- Ys 120 Fz
- YS-45 SE Parts ?
- Where's my YS -53??
- YS91 newer vs the older a/c
- YS 60FS Muffler Bolt
- Ys 140l
- FZ120 or F120?
- 140L running problem
- Ys63 fz Brak in/oil
- ST2 won't deliver
- ys 60
- YS 91AC Speed Increase in trans to idle.
- YS 91AC Leaning Out
- 45 Throttle barrel
- YS 63 Muffler
- How do I know
- YS 63 Regulator
- Keeping the muffler on
- YS63 Keeps pumping!
- YS 45SE...What RPM?
- Ys 53 Manual
- What nitro content for a YS80st
- Cant make contact with Dave S
- YS63 problems!
- YS63 carb problem
- Bent Crankshaft - What to do?
- Ys 60 Fr
- YS 53FZ having problems at the top end.
- YS63 Muffler baffle
- ys 120nc manual
- YS63 running lean on top end
- Ys63 Break In???
- YS 91AC Timing
- Which soft mount for 140 DZ
- YS 61 I need to know if I did something wroung?
- Ys 53
- YS63 Inverted?
- Ys 91 AC Muffler
- YS 61st2 rebuilding
- Ys 61st2
- 140 DZ Hand start or Starter ??
- YS Sport 140...when?
- 140's
- Ys 45 Fr
- How to make a YS-91 idle?
- Fuel Line Hookup
- YS.91FZ low/mid problems
- YS 63 problems
- YS 120 FZ low end
- YS120NC loads up in mid
- New YS 63 detonates and Dies.
- YS 61 R Problems
- YS 53 is running I hope?
- Looking for a good air filter for my Ys 63