- 120 NC worth rebuild
- Soft mount YS 120 AC
- Fuel metering DZ
- YS 110 header and muffler
- YS 91AC Sluggish throttle response
- YS FZ 110 fuel
- 140 FZ prop and rpm
- My Luck Has Changed
- Older YS Carb Help
- YS 110 Idle Problems
- Ys 91 ST
- YS 140L hunting at low throttle
- 63FZ Problem
- Ys 63 throttle management
- YS .45 parts
- 120 nc cam
- YS61 Valve Question
- 63S Opening Diaphram
- 1.40FZ cylinder head
- prop size for break in YS 63
- Stripped Head
- YS .63 Threads
- 160 DZ Pump Issue?
- Y/S .91 exhaust port problem
- Extra 300 prop size?
- Air filter for YS 110
- Change bearings for YS 63 FZ
- YS .63FZ Problem
- bubles in the fuel line
- remove piston 120 nc
- Green Stuff
- 1.10 throttle curve
- .63 problems..
- YS 63 FZS question
- 1.10 leans out in flight (idle only)?
- YS 120 AC manual
- YS 140 Sport possible problem
- Dave,,Ive got ?'s and ive heard you have answers!!!
- Help insall disc valve - YS63
- 140l
- YS .63 + CP 25%
- YS63 Broken cylinder head screws
- Ys .63 S
- 140L rpm
- YS 110 - Where's the power?
- YS 110 break-in prop.
- YS 63 FZs question
- YS .53 Fuel trouble
- YS Jewel or Junk???
- ys 63 problem
- YS 140L Questions
- ys 63 problem
- Black head color
- YS110 Needs Service?
- Enough Cooling for YS in Tiger Moth?
- New YS-63FZS speeds up when closing the throttle ?
- YS 63S RE-LOCATE REGULATOR?
- YS 140 Sport Slimline Muffler Help
- YS woes
- I've about had it with this engine (YS63)
- YS 45 bearings
- YS 63 FZ muffler
- Plumbing a YS .63 ... HOW ???
- Information on YS engines
- Check-valve and regulator
- Loss of compression
- YS140S running problem
- YS 140 Sport Mounting
- YS 160 DZ Question for break in!!!!!!!!!
- What is size of exh port for YS140L
- YS170's
- YS glo plugs
- ys 1.10 wont idle
- Dave Loosing my smoke
- YS repair Q's for YS 110
- New 1.10 regulator
- DZ Pump Valve Installation
- ys 120
- YS 63 Problem
- Fox miracle plug OK in YS FZ6S ?
- YS63 FZ Starting/Running Problem
- 63s Problem
- YS 110 Prop driver
- 45 2 stroke problrms
- YS 1.10 Repair
- 1.40 Sport
- YS91 FZ problem
- YS .63FZ Problem
- YS 140 Sport or 140DZ ??
- YS 110 richer idle
- problem starting 1.10
- YS63FZ Problem
- set screw on the HS...what size?
- YS160DZ Shuts down in verts at WOT - Solution
- Decals
- YS 63 main needle adjustment
- ys open header???
- Changing YS 140 FZ Ring
- YS-63S loosing power
- Couple of 110 questions
- YS 61 FR
- YS 110 Problems
- YS110 adjustment problem
- Fuel for 63
- YS .63S Exhaust Valve Problem
- 140 DZ Problems
- Cam gear spun on L...how much needs replacing?
- Help on my horrible 91FZ please.
- YS 140 Sport leaves heavy smoke trail
- YS 140 Sport
- YS 110 lean run
- 40% NITRO DAVE?
- ys .63 DAVE?
- YS 63S braking in
- RPM's 120 AC
- YS110 Damage
- Dave! Replace a YS140L w/a YS140 Sport?
- YS 63 FZS Muffler options
- 110 FZ pressure problem
- YS 91 AC Parts List
- YS 63 FZS
- first ys
- YS 110 Fuel leaking from Carb
- YS 160DZ question
- YS 110 repair advice needed
- YS and tuned pipe.
- Changing Fuel and adjusting settings?
- YS .63 FZS
- YS 160 DZ PROBLEMS
- YS 63 FZS transition question
- YS 1.10 and YS 1.20
- YS 120 AC
- YS 63 FZS tappets
- Nose Ring for YS 160 DZ.
- 140L regulator plunger size.
- Ys -FZ & SF
- 1.10
- YS 110 - Compression way down
- YS 63 Four stroke
- ys 120f engine mount
- Rocker questoin ?
- 110 bearing size
- 110 Fuel leakage question
- YS 140 FZ back plate
- YS140DZ problem
- YS 63 FZ s question
- YS 140 Leaning out on top end
- Problem with .63
- Dave need breakin question answered please
- YS FZ91 ???
- YS-45 FS Issues
- need help
- YS 110 out of fit
- YS 45 & Aurora pattern plane
- ys63 inconsistant
- YS 110 idle problems
- YS 110 air in fuel.
- YS110 Easy Refuelling
- Kudos to Dave and Richard!
- More YS 110 diaphram questions
- YS 120 Won't Pump Fuel
- YS 110 FZ-S
- black oil
- YS 110 Knock?
- YS 61 ST1 Update
- Cool Power 30% Heli fuel
- YS63 Fuel
- Prop for 140DZ???
- YS-110 spinner spacer collar...
- YS FZ 110 problems
- YS120 3-Blade
- MOVED: YS FZ110
- YS 63 FZS
- YS 63S Won't Hold Idle
- Ys 120 history
- YS DZ160 Fuel injector pops out
- YS 120NC /SIG Mayhem(72") ????
- Max A/C weight w/YS
- YS 45 Muffled Tuned Pipe
- YS 63 FZS tappets
- 140 DZ changing idle
- Cool Power 30% heli fuel and after run oil??
- YS 120 MANUAL
- YS 63FZ Rough idle
- Problem with my YS 140 sport
- ys 140 sport not working
- FZ91 Prop Nut
- YS 61 Rear
- YS 45 FS broken needle valve
- ys 60's
- YS 110 prop choice
- my YS110 problem
- YS .63FZ
- My 110 is giving me fits again...
- ys 140 differences
- Info on YS F120
- Where is YS110?
- YS 61ST
- Header Tanks needed?
- YS 110 Leak detection
- ys120sf no fuel at top end
- .63s fuel consumption
- YS AC's ??
- YS 60 FS
- YS 63 FZ S muffler
- Help! FZ 63s failed to start
- Needing parts for a ys 45
- Yamada 63 FZ
- DZ 160 starting question
- 120SF early or late model?
- YS 63 in flight problems
- Question about my YS 110
- engine mount for 160DZ and 140L
- Requesting YS 120FZ Help
- Is 140L Vs 140Sport
- Is Coolpower Heli 30% OK in a YS 63 FZ-S?
- YS 110 Valve Lifter Oil
- Regulator housing
- YS-120SC Leaking Fuel Out of Carb.
- YS 140L Header Problem
- Inverted YS 110 problem, carb leaking
- YS 61R
- F-120 NC Fuel metering problem
- low speed for ys 120sf
- YS .63 no compression
- 160 DZ After run oil in to the crankcase
- ys 63 fzs WORKING GREAT
- YS63S, loading up slightly after inverted flat spins
- YS 110 not running
- YS 120 NC
- 160DZ Questions
- I Broke My YS
- YS61 leaking fuel- doesn't stay running
- YS120NC
- FZ63S - Won't stop running
- YS 45 Service
- YS-45
- YS 110 running too rich and idle problem
- YS-45 FS Issues
- which engine?
- Availibility of Parts for Older Engines
- 63 transistion
- dz keeps popping hose from regulator to carb
- YS 63 FZS break in
- YS 45 cleaning regulator
- 140 sport rough idle
- ys61 stII quits in flight
- ys 110 break in
- YS 110 after run recomendations
- YS 110 not running