- Just done the OS 50 web mod :D
- whats the deal with this stupid zen 231
- My OS 91SZ-H hyper seems weak inverted
- ys 80 tuning
- OS .50 Hyper idle problem.
- OS 91 SZ-H Hyper \ ViperHead \ Magnum fuel
- Thunder Tigre 50 Tuning
- 30% Nitro
- ASP 46 Engine w/ Carb settings
- Stainless steel bearings
- Time to change bearing...
- Alright time to ask...OS 91SZ-H PS-Hyper
- Which is best muffler for OS-50 Hyper?
- Hatori JK-50 muffler
- OS91SZ PS Hyper and viperhead
- os91 szh & os91 szh Pumped
- Is this scratched normal?
- Changing engine bearing
- Lean run causing tail kick?
- I'm ready to buy an OMI 60K
- Engine choking as carb opened on Z23
- Changing piston do you need to change liner?
- TT-39 dies abruptly when glow starter removed...
- Engine's variables?
- What is the Web Mod for the OS-50sxz Hyper? Does it help?