Well I looked at the bypass valve this weekend. Dutch, I didn't have it in me to cut that pin off like you said. I was afraid I would end up with massive amounts (650cc's) of engine braking. I polished the end of it so it would interface better with that nylon plunger thingy in the carb and lengthened the spring free length from 22.7mm to 27mm. I ended up with increased engine braking and occassional high idles. But, not as high as before. The jury is still out.