I think it broke because of the mechanical shutoff lever, it’s difficult to get the top cover off because of that lever, the throttle cage likes to get stuck on it, that’s the only thing I can think of.
Well since I had the nasty pump apart to find the missing piece I went ahead and gave it a good cleaning, re-sealed it all and installed a 12mm head/rotor on it. Even though I don’t plan to make lots of power with it, I like the 12mm head and rotor because I can get more fueling control with the LDA. That means more power with little or no pre-boost smoke.
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