Eumig S 802D Motor Fault Fix Possibly cine film transfer 8mm super 8 Repair

I Have Had A Problem With The Motor Not Tuning The Film In The Projector, Ether Too Slow Or Not At All. I Have Used PlatenClene For A Few Years On Laser Printer Paper Pickup Wheels With Great Success So I Thought I Would Try On My Eumig, Great Results As A Quick Fix I Think, I Also Have Another Problem Which You Will See In The Clip That The Film Rolls Or Bounces In The Gate, Im Not Sure What The Problem Is So If Someone Can Shine A Light On It I Would Be Greatful.details on a fix with diagrams would be great. hope this helps someone then i have done a good job. Thanks For Looking.