chain slip from middle to small chainring

[Cappi]

Hi, i'm a little baffled here. need some help. I recently replaced all my pivot bearings on my Spark 920. This required the removal of crankset and FD. After i replaced it, on a ride i noticed than when i'm in the middle chainring and biggest cog at the back the chain tends to slip off onto the smallest chainring. There is no chain rubbing against the FD when in this gear. It just works fine for a few rotations then slips off. All the other gears run smoothly. could it be that i need to readjust the FD limit screws and all? after all i did remove the cable from the FD.

thanks

 

[akneethling]

Perhaps the cable tension is different. Too slack. I'd try to put it on the small chainring and readjust the tension.

[David Marshall]

If there is no chain rubbing it is not the FD settings or cable.  Most likely the chain ring is worn or when you replaced the crank you have misplaced a spacer, moving the chain line further out.  Lastly I would check that the rear derailleur hangar is straight.

[raptor-22]

When you replaced the pivot bearings did you also place the dust caps and soscers for the rear triangle back in the correct order ?

[FCH]

Sounds like either allignment issue or a tooth on middle run thats bent or worn down; going by the work you did, very likely alligned wrongly.

[Cappi]

If there is no chain rubbing it is not the FD settings or cable.  Most likely the chain ring is worn or when you replaced the crank you have misplaced a spacer, moving the chain line further out.  Lastly I would check that the rear derailleur hangar is straight.

no spacers on crankset. Will check RD and chainring teeth. thanks.

 

When you replaced the pivot bearings did you also place the dust caps and soscers for the rear triangle back in the correct order ?

i'm sure i did lol. im 2nd guessing myself now. lol

 

Sounds like either allignment issue or a tooth on middle run thats bent or worn down; going by the work you did, very likely alligned wrongly.

i will recheck alignment. strange thing is my old rig that i sold had the same issue just after i sold it. my buddy to whom i sold it just doesnt bother with it much as he just shifts over to the small ring and continues to climb.

 

thanks for the responses guys.