- 120SF Exhaust valve?
- FZ53 suspect regulator
- YS120 YS140 Documentation - Setup - Maintenancee
- YS91AC Carb cleaning
- YS FZ63 and FZ110S Problem Children
- Old YS 120 f
- ys 110s lean out problems
- Is it manditory to use a gas ported piston?
- Weston Genesis Aero Pipes for YS 61R / YS 61 S Classic Engines ?
- YS engine help
- YS 120SF bent crankshaft repair
- YS170 Sudden Dead Stop from Fast Idle
- YS engine service Australia
- YS 140 and up opinion
- YS 115S crank replace
- YS-185 CDI Sensor problem
- Ys91ac fuel selection
- 45 FS muffler mounting screw size
- FZ110 excessive smoking
- Propeller choice for 115S
- YS Newbie Exhaust Question
- YS direct 80, 115 Mufflers
- DZ 200 CDI NEW, Problem in mid rang
- YS 140L wont throttle up
- Request for update
- YS 110 dripping fuel from air chamber
- Black oil from Hatori tuned muffler
- About factory setting for "low speed needle valve" of YS115WS
- YS FZ-175s Tuning
- YS 110S Tuning
- DZ 160 cdi flooded crankcase?
- What's difference between YS185DZ and YS175FZ
- YS 63S Surges Above Half Throttle
- DZ160 won't shut down
- FZ-140 flooding
- Running in a new YS
- Difficult to start YS FZ115WS by electirc starter
- YS 91AC needle valve
- 110 fz sudden stop and compression on every stroke
- 53 available again?????
- How to buy YS FZ115-WS out of US?
- YS 140 fz flooding out
- Info about this YS please
- What is the fix for a rich mid range in a YS 120NC
- YS63FZ-S Valve Seats
- Valve retainer diameter
- Ys fz80 not available?
- ys 120 excessive smoke
- YS 140 DINGO how set the gap disc valve?
- YS 91 AC or new YS 80fz for Warbird Racing
- YS FZ 63 Low RPM
- YS91FZ, need help with the Regulator setting.
- 185 dz cdi - air in the fuel line between injector and throttle body
- DZ 170 Questions
- Ys 120 muffler thread
- ys63s quits running
- YS 185 Prop torque settings
- ys 63 metal sounds
- Need a little help sourcing a part
- YS 61 ar long stroke
- Dz140
- YS 115 flkooding
- New 80 four stroke???
- Ys 91fz
- YS63FZ-S quits in a maneuver
- YS 185 cdi zero surging going rich and back firing
- Engine size, Proppeller, RPM
- After run/storage oil for YS engines
- P51-d / ys 115ws or ys 140fz
- So what happened to YS (Yamada Mfg)?
- ys 120 fz...what prop size to use???
- YS 120 F compression
- YS FZ 53/70/80 S engines listed at YS Japan
- Ys 60 with macs tuned pipe
- Y.s. Fz120
- YS-120FS Rich Idle
- YS 63 won't go above 8,000 rpm
- older but seems to be in great shape ys 1.20 sputtering
- Drilling piston for
- YS 140 quits
- ys .45 2cycle
- YS FZ110S rebuilt - question on regulator
- re-assemble YS110s crankshaft into casing
- FZ110S bearings spec
- YS 185 won't throttle up.
- YS 170 DZ will not idle down
- Stuck valves
- YS DZ70 fuel draw problems....
- YS 175 CDI Negative Push engine dies out
- YS DZ70 - Air Bubbles in Fuel Injector Line
- Cue The Sombre Music
- Synthetic after run oil safe on silicone?
- Rear Bearing debris - New Crankcase?
- YS set up to run in reverse rotation for twin
- YF 120FZ - Valve cover Pressurized?
- This section is just a mine of information, thanks to all contributors
- Ys dz
- YS 53 squeaking
- YS 53 repaired
- Aluminum beam mount for YS 115
- Timing YS-FZ-140
- YS CDI ver. 2 - Power Source Selection
- YS F-120 RPM recommendations
- YS CDI Ver. 2 - RPM Telemetry
- Ys fz 91
- Ys 115fz s
- YS 61-S o-ring needle valve idle adjust
- 175FZ fuel system question
- us engine repair
- ys engine repair
- YS F-120 help... parts missing!
- YS 45 spare parts frustration
- Ys fz 110 prop nut
- Ys 61-s
- Ys fz63. Won't idle w/o glow igniter
- Ys fz63 won't idle without glow igniter
- Fz 120
- Check valve
- ys 110 not Guard low idel
- YS110s no response to throttle.
- greg bischof
- What Head Is This?
- I have a question about the DZ185 cdi.
- DZ160 Power Comparison
- Pulse 60 Saito 100 need more
- break in ys dz 170 cdi
- YS FZ70S vs DZ70S Difference?
- IS YS FZ1.40 TO MUCH POWER FOR Top Flite P51d 60 size?
- YS120AC needle valve question
- YS FZ110-S Muffler Adapter
- YS FZ 140 S Piston Damage.
- YS Fz63 disc valve and cylinder head valve sealing info needed
- YS 120AC piston design/failure?
- ys 63 fuel line pressure
- ys63 fuel consumpsion
- fz 63s mounting
- ys fz3s throttle arm
- YS 110S regulator tear down
- fuel dripping from carb on 120fz
- YS 115 problems
- FZ70-S : rotating the regulator
- Mid range stumble and dies
- Best , no compromise YsFZ140 exhaust setup?
- ys 70 pipe
- change the prop from 17x12 to 18.1x10
- .91 AC Mixture Problems
- YS170 fuel tank clunk & break-in
- YS50ST Head gasket dramas. need help!
- Ys175 cdi
- YS FZ 140 Sport Throttle Barrel Seizing
- YS 140L surging
- 140L compression
- ys fz 63 break in
- ys 160dz Question ?
- New YS Engine "Coming Soon"
- ys 170dz cam follower
- muffler for YS45FR
- When to replace YS bearings
- BYRON 30% Heli Fuel?
- YS 170 DZ Needle valve and regulator / low speed setting
- YS 170 prop - 4 blade?
- how do you stop syphoning
- to vibrate or not to vibrate...
- YS DZ 70
- YS45 on Arrow 40
- Seating New Bearings in a YS 61-R
- YS45FR won't start
- YS F120 exhaust port
- How do I remove the head from a YS 140L engine
- Max rpm for ys 120f sc
- New YS70
- where do i get this exhaust?
- ys170dz Fuel tank
- help with idle problem on 91AC
- ys 1.20 se ?
- ys 120 fs or ac ?
- 115FZ Crank re assembly
- YS DZ140
- Piston / Sleeve Clearance
- F120
- used 91 ST heli engine wont run
- 115S fuel consumption
- dz 160 engine problem
- Pre-buy inspection of YS140L
- YS 61 Long stroke fuel consumption
- YS 115 Muffler Header
- YS61-S
- Parts for YS .61 long stroke (rear ex)
- YS-63 Drive hub
- YSDZ 160 cam bearing removal from crankcase
- YS 175 CDI Nose Ring
- YS 63 overly rich regulator
- 120 decreasing rpm
- Muffler keeps loosening up
- fuel leaking out carb? 120fs
- 110 FZ pushrod tubes
- YS 70FZ 16-6 Prop?
- YS CDI RF interference
- YS-115 Rough on Idle
- YS 91AC CDI - Lubrication
- YS120SF Needs Help
- YS-FZ110 dies on idle only in flight
- YS 91AC
- YS115 wont start
- ys 91 ac question
- YS 170 regulator
- YS 70 loading up
- ys fz110 (not the s version)
- New YS 115s runs then dies over and over.
- help with YS info
- Identification of YS 120
- Y 140 no compression
- YS 120SF crankshaft questions
- FZ70 Disassembly
- Proper Service After 5yr Storage
- Ys fz70
- YS 160/170 to gasser?
- Ys FZ 110S, just want to make sure.
- ys 170 - shutting down
- YS F120 Crankshaft Confusion...explain ? ?
- dz160 stop in Loud noise
- 91 ac idle problem
- Badly running YS 63S
- Where are the 91FZ's??
- YS-120SF VS YS-120NC
- YS 110s problems
- YS Super Mount 3
- Is this muffler ok?
- 3 or 4 blade prop for ys fz 91?
- YS 140 Sport Idle Problems
- YS 140 Sport
- YS 115s and fuel consuption
- Wanted: YS 45 Carb. body
- F1.20 head replacement
- Question re smoke trail YSFZ 1.10
- YS 110s problem
- ys 91 4 stroke
- YS 120 No Pressure from Pump.
- yamada email
- Striped out muffler caseing
- YS 160DZ Help
- 160 vs 170 cdi much difference?
- YS Repair Facility
- Troubled YS110S
- Old YS.60 2S-need directions
- YS 1.40L sensitive needle
- New FZ-110s fuel problems
- .91 AC
- YS FZ 70S a few questions
- YS 110FZ throttle barrel setting