chain not sitting nicely on back wheel

[stevechow]

my chain after tuning now cannot sit nicely on the gear\wheel behind. all the gears 1-9 is affected. how to tune it back. it keeps 'kicking' every 10-20 cycles. please help.

 

[alienator]

my chain after tuning now cannot sit nicely on the gear\wheel behind. all the gears 1-9 is affected. how to tune it back. it keeps 'kicking' every 10-20 cycles. please help.

When in the 5th cog in back, is the top derailleur pulley centered on the 5th cog? Also, is the RD cable moving smoothly? Is the cable guide under the BB clean? How old are the cables and housings?

 

[Peter@vecchios]

my chain after tuning now cannot sit nicely on the gear\wheel behind. all the gears 1-9 is affected. how to tune it back. it keeps 'kicking' every 10-20 cycles. please help.

Tight link??

 

[Camilo]

my chain after tuning now cannot sit nicely on the gear\wheel behind. all the gears 1-9 is affected. how to tune it back. it keeps 'kicking' every 10-20 cycles. please help.

Who tuned it? What was done? How old are the cassette and chain?

 

[alfeng]

my chain after tuning now cannot sit nicely on the gear\wheel behind. all the gears 1-9 is affected. how to tune it back. it keeps 'kicking' every 10-20 cycles. please help.

To state the obvious, since we are all presuming you know HOW to "tune" the indexing, the chain should be a 9-speed chain ... using a significantly wider chain than intended by the engineers who designed the drivetrain is one way you can probably create the problem you are describing ...

A rear derailleur hanger that needs alignment is probably another way to create the problem you are describing.

 

[LewisBricktop]

if all the other stuff checks out, you could have the frame's rear triangle alignment checked.

 

[stevechow]

When in the 5th cog in back, is the top derailleur pulley centered on the 5th cog? Also, is the RD cable moving smoothly? Is the cable guide under the BB clean? How old are the cables and housings?

yes top pulley centered. the word shimano 105 is straight line. cable new. run smooth. bike is new