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OS105HZ-R Muffler PaulBowen 8 201 09-30-2014 03:26 AM
Rob43
Nitro % and RPM don s 6 150 09-30-2014 02:46 AM
Gearhead
OS ENGINE 91 HZ & 91HZ-R Has Been Discontinued Helicrazy4 6 236 09-28-2014 09:29 PM
tyfast27
Go Engines Papa Sal 14 469 09-27-2014 06:14 PM
fastflyer20
fuel magnet vs OS bubble less clunk BrianApp 17 375 09-25-2014 03:14 AM
utahbob
91srx or 120srx blucido 6 194 09-22-2014 12:39 AM
kthane
Whats the top 50 right now Canadian_High 7 292 09-18-2014 07:49 PM
Rob43
OS55 with cy mp5 pipe? JAYHELI 1 76 09-16-2014 05:23 PM
rexxigpilot
YS 91 SRX Tareq jmiceli11 1 164 09-15-2014 03:31 PM
jbjones
Need a 50-60 size fuel tank.... cmsilvoy 1 81 09-14-2014 04:30 AM
Ghia
OS105 Head Shims For 22.5% nitro ? duckmansweb 1 130 09-13-2014 01:51 PM
dchekas
Engine bearings rudyy 1 130 09-12-2014 08:26 PM
Andy from Sandy
Best muffler/pipe for OS 55HZ cmsilvoy 12 269 09-10-2014 03:05 AM
cmsilvoy
Align 50 pipe michael88997 6 124 09-09-2014 12:27 AM
Gearhead
Is this engine now a paper weight? Harry Spillett 16 471 09-08-2014 09:46 PM
Andy from Sandy
YS120SR-X ( page 1 2 3 4 ... Last page ) mpafonseca 133 5533 09-06-2014 10:21 AM
jonesheli
Bottom plate sensor on YS91-SRX rudyy 15 293 09-04-2014 04:45 AM
Glenn Goodlett
HYPER OS 50 epryor 4 181 08-26-2014 01:56 AM
dkshema
YS 80 won't run worth a !@#$ Help! ( page 1 2 3 ) AirCowboy 40 613 08-20-2014 10:18 AM
Mike0251
YS91SRX vs 3DS rudyy 5 320 08-19-2014 10:33 PM
hyflyr
Os 55 hz tuning question michael88997 12 390 08-19-2014 06:45 PM
Rob43
Which plug to use mookie 11 365 08-14-2014 08:24 PM
dcasole
Different sound when inverted datidun 2 179 08-11-2014 12:36 PM
datidun
OS 50 hyper idle help Nate 8 212 08-10-2014 05:04 AM
dkshema
YS60 going rich Zaneman007 10 311 08-10-2014 03:17 AM
Rob43
Looking for feedback from OS 91 Speed owners in2deep 3 263 08-03-2014 06:21 PM
Gator1
Magnum vs CP Fuel bobc1 5 378 08-01-2014 04:14 AM
Rob43
most powerful engine wimpytwins 6 478 07-25-2014 07:29 AM
ticedoff8
YS60sr rear bearing johnbs8 8 288 07-22-2014 04:24 PM
ticedoff8
YS50ST Diaphragm rspiegel 3 203 07-22-2014 02:23 AM
rspiegel
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