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[quote]QUOTE: Originally posted by mikebonellisr The drivers will go about a 1/2 revolution then stop[bind?].Then I have to apply more power, which causes the engine to jump foward. [/quote] Hi, Mike! This sounds to me as the same kind of problem I had with my Spectrum K4 Pacific. Try this: when the drivers stop/bind (turn the engine upside down to make this easier), try to check if it is one of the main rods (which connect the drivers) actually "pushing" the drivers apart because it is "too long". If that's the case, this rod will be jammed, not moving laterally at all. I slightly bent outwards the rod that was causing my K4 to "hunt", but be careful, it has to clear all the other moving parts. Also, try lubricating all the joints in the valve gear and rods with extremely tiny droplets of fine oil, best applied with a needle or a thin wire. Hope you solve this problem succesfully! Best regards, Oliver.
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