Trouble with shimano 1x11

[fphmtb]

It's a Shimano 1x11 drivetrain, with a 11-42 cassette.
Runs and shifts perfectly until the lowest gear, and then runs and sounds like crap, also will jump, but only when pedalling.
Chain and cassette are not very worn

Any help
Thanks

 

[moorey]

Set your low screw adjustment right?

 

[moorey]

Just started? Bent your hanger or derailleur?

 

[ozzybmx]

Has it done this from the start ? Or was good, then went bad. If its just happened, it may be a bent hanger/der as Moorey says.

If it been like this since you got it, L screw not low enough, L screw too low and cable stretched, chain too long and B screw needs adjusted, chain kinked, chain stretched, cassette tooth bent and maybe Shimano chain pin link stiff.

 

[bear the bear]

It's a Shimano 1x11 drivetrain, with a 11-42 cassette.
Runs and shifts perfectly until the lowest gear, and then runs and sounds like crap, also will jump, but only when pedalling.
Chain and cassette are not very worn

Any help
Thanks

Just confirming when you say lowest gear you mean 42 or 11.....some people mix the terminology

 

[Ultra Lord]

How are the driver bearings? Mine skipped in 3rd,4th for half a ride then the driver blew up.

 

[OTH Dave]

I have same setup and after a few months from new started to skip and jump gears.
Check for gear cable tension / stretch. This fixed mine in seconds.
Not sure about low gear Issue. Could be B screw, bent hanger etc as mentioned above or maybe even chain alignment or offset.
check also that cassette has not come loose.

 

[dunndog]

Set your low screw adjustment right?

Nailed it More E.