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Torco fuel utahbob 10 276 06-08-2018 01:37 AM
FLYERCLD
YS91SRX tunning FLYERCLD 2 83 05-25-2018 02:35 PM
FLYERCLD
Beware don't ruin your 91srx or 96srx YS Engines  ( page 1 2 ) ssrobzoom 20 1571 05-23-2018 02:31 PM
Richardmid1
Plug for muffler Damper 5 110 05-18-2018 01:22 AM
JuanRodriguez
torco fuel?? slayer 1 140 05-06-2018 09:06 PM
JuanRodriguez
OS 70SZ-H questions,,  Gearhead 7 249 05-06-2018 06:48 PM
Gearhead
ys 91srx tareq break-in needle settings ( page 1 2 3 ) gt48 43 3064 05-01-2018 11:23 AM
Richardmid1
Try to overhaul.  Dirtpen 8 371 05-01-2018 01:19 AM
Dirtpen
Semi Rebuilding YS91ST Engine with Hatori Pipe  InvertedDude 5 187 04-30-2018 01:27 PM
Richardmid1
Outrage fuel ?  lionel06 3 183 04-28-2018 05:52 PM
Dirtpen
Piston pin retainers  datidun 15 645 04-23-2018 02:41 PM
Richardmid1
OS powerboost 105 pipe dimensions Olorin5 4 155 04-21-2018 04:07 PM
Olorin5
Gear ratio vs. blade size  Yeager 18 467 04-20-2018 07:43 PM
Yeager
Cool Power HELI - European dealer Yeager 1 155 04-04-2018 11:29 AM
datidun
os 55 Magnum Center-Glide Bearing System  ( page 1 2 3 4 ... Last page ) kenstick 252 27192 03-22-2018 11:26 AM
GHT
y.s srs 91@91 3ds? slayer 2 164 03-12-2018 10:46 PM
slayer
y.s sr 91?? slayer 7 274 03-12-2018 10:08 PM
slayer
blew a hole in my 91HZ piston: cleaning procedure?  ( page 1 2 ) cudaboy_71 20 686 02-27-2018 02:15 PM
cudaboy_71
Headspeed vs Gear Ratio vs Optimum Engine RPM question GeezerJoe 10 448 02-25-2018 07:29 PM
GeezerJoe
MECOA .46 Heli Engine.  Mikerobe 7 458 02-13-2018 02:04 PM
Mikerobe
OS Regulator DRS (Demand Regulator System)  ssrobzoom 4 520 02-07-2018 08:52 PM
GeezerJoe
Carburetor Rotor Guide Slot - Damaged From Clogged Mid Needle Port.  GeezerJoe 0 161 02-07-2018 08:41 PM
GeezerJoe
Buying new OS engines basmntdweller 6 568 02-03-2018 03:32 PM
wjvail
Parts Lists and Schematics for older OS Engines? Mikerobe 3 267 01-30-2018 03:26 PM
JuanRodriguez
Is 105 HZR with fuel pouring out of ? rockrand 1 281 12-05-2017 12:36 AM
dbcaster
OS 55 HZ Engine Correct operating temperature Gary Steward 3 335 12-02-2017 01:36 AM
ICUR1-2
YS91ST Help ( page 1 2 ) Richardmid1 24 922 11-27-2017 02:19 PM
Richardmid1
wanted hatori 672 muffler for kalt alpha mccoy 2 239 11-26-2017 12:13 AM
wjvail
2-Cycle Pipe Tuning  ( page 1 2 ) EEngineer 22 1118 11-12-2017 03:34 PM
wjvail
RC Japan - OS-105 Piston  duckmansweb 0 365 11-09-2017 02:35 AM
duckmansweb

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