Re: '85 Force 125hp kingpin
Replacement will not solve the problem by itself. The yoke corrodes. Since aluminum corrosion is about ten times the volume of mass aluminum, the yoke squeezes the plastic bushings tight onto the kingpin. The cure is to remove the bushings and clean the corrosion from the yoke. Then, It may still be necessary to open up the hole in the bushings as they may have shrunk permanently.
When you install them, coat the inside of the yoke with anti-seize , then install the bushings. Grease will not get into this area and corrosion will start again without preventive measures like anti-seize.
Finally, examine the kingpin to see if it still has enough meat in it to be serviceable. Pitting won't cause problems unless it is excessive. If you re-use it, coat everything with grease before assembly. after assembly, pump grease into it. Hopefully, now, it will come out of both top and bottom.
After all this work, your steering should be silky smooth and quite easy. Don't be surprised if the engine turns by itself with hands off the wheel. However, setting the exhaust snout should minimise this and you should feel like you are driving a car, with very little steering force and input.
