A coast plug (actually called "coast valve") can be purchased and installed to the RTV if you don't like the abrupt stop when you let off the go-pedal.
Be advised that when installed, your RTV will pretty much coast to a stop as it'll remove most of the engine braking. If you live in hilly terrain, you'll lose the engine braking when going down a hill and need to use the brake instead.
Many like the coast valve but for those of us that live in the steep hills, many prefer the engine braking and just get used to feathering off the pedal slowly to avoid the abrupt stop.
Be advised that when installed, your RTV will pretty much coast to a stop as it'll remove most of the engine braking. If you live in hilly terrain, you'll lose the engine braking when going down a hill and need to use the brake instead.
Many like the coast valve but for those of us that live in the steep hills, many prefer the engine braking and just get used to feathering off the pedal slowly to avoid the abrupt stop.