Front Derailleur moves chain too far over
Hi all,
I have a road bike with a Claris 2400 triple front derailleur and shifter. I biked perhaps 700 miles on it.
In the largest ring, I have two half-shifting positions (of course). What's puzzling: once I'm in the outer half-shifter position, I can move the shift lever further resulting in the derailleur significantly moving further outwards by 2 to 3 mm. Once, I release the shift lever, the derailleur goes back to the outer half-shifter position.
This causes a lot of misery:
I have to very carefully shift from the middle to the large ring. Once I hear the half-shifter click, I need to stop pushing the shifter further otherwise the derailleur goes into this 2 to 3 mm offset position making the chain slip over the large ring.
This is mostly a problem when I'm on the rear in the outer cogs. When I'm in the inner cogs, the chain does not slip over.
How do I get rid of these 2 to 3 mm?
By now I made a lot of random changes including changing the position of the derailleur. So, assume a completely messed up system :-/.