- Installation of New Revolution Muffler
- YS 91 with Viper Head
- YS91ST Regulator Issue (possibly!)
- Questions for CarbSmart Users
- OS 61 Carburetor to a OS 50 Hyper???
- Need Schooling on the YS 80 ST Carb
- Helicopter engine on a fixed wing
- Where to install carbsmart sensor
- Well, "There's your problem"
- OS50 Hyper Hunting with multigov. Need help
- sz-h carb with regulator on the sx-h pumped??
- OS Hyper 50 vs YS50...$$$$$$ ?
- Need advice with muffler
- strange OS50 Hyper issue.
- Webra costumer service =10/10
- What is the best, O.S - Y.S.-T.T. for 50 sized motors?
- Removing clutch nut
- OS 50 bearing issue
- OS 91SZ-H Pump vs. YS 91SR Long Stroke
- OS 50 Hyper vs Align 50 - What differences ?
- 91sz-H Mixture
- YS 91 Max head temp
- HUH? OS and YS .91 engine size.....?!?!
- Spare parts for the Redline engine?
- Help - Size of Thrust washer in OS Hyper 50