di2 front derailleur jumps when shifting down
Hi, I just got a new bike with Shimano di2 R8050. All is working good, except when I shift my front derailleur down it does a slight jump (chain slips) after about a second or a bit less. If I have it on the bike stand (no load), I can not notice anything. It needs to be under some load. Not changing gears under high load, just normal riding. Any idea what this could be? Taking it back to the bike shop they might keep it for quite a while, and not too sure about their mechanics start with. Might be something simple I hope. Front derailleur works perfectly apart from this.
== Update ==
On the bike stand I can replicate this condition by applying slight brake to bake wheel - shift down under slight load(normal riding). Can see the chain does not fit into lower chainwheel. Could something be assembled incorrectly? I have photo, but can not post is here(Get error message " You are not allowed to post URLs until you have at least 10 posts".). Photo taken as chain just starts shifting down. Half the chain is still on the large chainwheel at time of photo. Any way I can post photo or URL to photo??
Last edited by djhosken; 08-19-18 at 06:11 PM.
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