Lifan 79cc 4 stroke bike engine Clutch Screech

Davideo

Member
Feb 25, 2020
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All of a sudden I have this horrible. screeching noise coming from my bike, I cant even walk it along without experiencing it. All comments and suggestions for a solution are much appreciated.
 

MotoMagz

Well-Known Member
Aug 2, 2010
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Michigan
Your chain will natural stretch. So you will have to adjust motor forward or remove a chain link. If a link is to much go with a half link . Also remove clutch to investigate! Is the clutch or jackshaft making the noise?
 

Davideo

Member
Feb 25, 2020
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85
18
83
Thanks Moto! The chain is rather loose as you say and the bell drum rattles around a lot, not sure if this movement is normal since this is my first experience with 4 stroke engines. I have since isolated the source of the problem to be in the clutch its self. After removing and taking it apart I found lots of grit and some aluminium shavings mixed with grease loose inside the bell drum. After a cleanup and bearing lubrication its operation seems to be back to normal....we shall see.
 
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