When I got this used bike, yesterday, the chain was really loose. I tightened it last night to normal specs.
Today I rode to the shop on another matter but I detected a rhythmic noise from the chain area. Related to speed of the bike but not the motor since I could de-clutch and coast and there it was scrunch- scrunch-scrunch. Something amiss.
In the garage I rolled the bike till I found the scrunchy spot. The chain was tight as Dick's Hat band. (For you youngsters- that means it was really tight.) If I rolled few feet forward or backward it was normal- loose.
By experimenting I found that at certain segment of the rear sprocket- for no known reason- the chain was not seating down on the teeth. This was what is apparently causing the chain to be tight then loose. WTF?
I have not removed the chain, nor the sprocket but neither appear to have been damaged. The chain is probably old and nearly worn out. I don't want to put a new chain into a bad situation.
I would appreciate your thoughts on the matter.
Bob
edit to add the bike has 18k miles on it- do not know the age of the chain/sprocket but bet its orignal.
Today I rode to the shop on another matter but I detected a rhythmic noise from the chain area. Related to speed of the bike but not the motor since I could de-clutch and coast and there it was scrunch- scrunch-scrunch. Something amiss.
In the garage I rolled the bike till I found the scrunchy spot. The chain was tight as Dick's Hat band. (For you youngsters- that means it was really tight.) If I rolled few feet forward or backward it was normal- loose.
By experimenting I found that at certain segment of the rear sprocket- for no known reason- the chain was not seating down on the teeth. This was what is apparently causing the chain to be tight then loose. WTF?
I have not removed the chain, nor the sprocket but neither appear to have been damaged. The chain is probably old and nearly worn out. I don't want to put a new chain into a bad situation.
I would appreciate your thoughts on the matter.
Bob
edit to add the bike has 18k miles on it- do not know the age of the chain/sprocket but bet its orignal.