Many of the folks having problems with this engine are trying to run it with the fuel tank 12" or so behind the engine without assistance. No engine, other than a pumped/pressurized engine will run properly under such conditions.

I wish YS would bring back some of their pressurized two-strokes, but with muffler tuning and a thirst for 5% nitro.

Or, if they don't want to do the muffler tuning thing, include a muffler like the Ultrathrust or Jett high performance mufflers.


Ed Cregger

I know this is an old post, but the topic is still current.