Originally posted by pinball
ANOTHER good reason to hate RNVs! At least on the OS .46 FX, the RNV (and tube) get in the way of the engine mounting screws. But I don't understand why the zip ties didn't take care of the problem.
I've had little bubblies with my OS .46 FX. I put really clear tubing between the tank and the needle valve, and the bubbles were definitely coming from the valve, not the tank. But it only happened when I accelerated quickly from idle to full open, so not a big deal.
Since the needle valve that goes into the carb seems to be exactly the same as the needle valve that goes into the RNV, with the exact same O ring, it would seem to me that both probably suck air exactly the same, it's just you can't see it with the carb-mounted NV.
I don't know if I said this, but my engine is also a 46 FX. I had a hard time finding clear tubing. Tough to see little bubbles through the blue tubing. Oh well.