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Ok, I understand your point. But there has to be something in the design of the 9t motor sprocket systems because the owners of 11/12/13t ones (all the S versions) rarely, if at all, complain about the roughness issue. That is why I changed mine (switch to 11T and 41T), which seems to have...

Hi robelee, Apparently forum member NRG has found the fundamental cause of the problem in the thread 'Pro Connect feels rough'. He has recorded the video evidence showing where the issue comes from - i.e. faulty design of the 9t motor sprocket. I was able to solve my issue immediately by...

Thanx NRG for videos! They are excellent. Apparently the slipping on the idler arm sprocket/cog is caused by the chain that gets tangled into the teeth of the 9T motor sprocket and will then not engage correctly the next cog/sprocket. The noise I heard in your video is exactly the noise I...

Ok, I understand your point. Maybe then we as consumers should inquire Derby Cycles directly why this double follower design has not been made available to all the bikes and whether there is a possibility to acquire one in light of the problems of chain slippage. I remember reading a post in...

Although I completely agree with everything else you are saying, I have to disagree here. As Hugh, I think that if the chain jumping/slipping has become a known issue, for the subsequent double sprocket follower, 2011 model design certainly proves it, it is up to Panasonic/Derby to notify the...

Thanx 10 mph. Unfortunately, My photo is upside down :). Seeing yours, I wander if it is possible to install this new system to all Panasonic crank units. I would certainly be interested, as it will obviously stop all the chain rumbling and clicking related to slippage. And even if I would have...

A good idea to ask around. To get started, here is the original configuration of my 2010 PC. As you can see from the picture, only two teeth of the idler pulley are wrapped by chain with 9t motor sprocket. If you increase the size of the motor sprocket, the angle of the chain increases and it...

Very interesting observations by all, Yes, the increase in power output explains my issues because first the problem only appeared on highest power mode and at high difficulties (i.e. Steep hill climbing in 1:2 power output ratio) However, my bike (2010 PC version) still does not have...

Hi Scott, It clearly seems from you prompt replies and you help suggestions that you have a very good service indeed. So do not take my post personally. But I still maintain that the issue at hand might be a fundamental weakness with a 9T motor sprocket systems. Even flecc suggests as much in...

Hi Scott, If you've read my posts, you know that I've bough my bike not from UK but from France where I live (in Paris, to me more precise). But this is not the issue. The problem I'm talking about appears to be recurrent as witnessed by another post of complaints of many people with the same...

Hi Flecc, Scott and others who kindly answered to my plight, After a long hassle and after having my bike taken back to Germany for 2 months only to have the problem reappear again in no time, I've finally found a foolproof solution to the issue by myself with some common sense. I describe...

Solution to the rattling clicking noise with Agattus/ PC and other pedelecs I accidentally submitted my post before finishing it. So here is the solution for all who have suffered from this problem: 1. My first thought was that why don't the owners of the S (speed versions) pedelecs of...

Hey roblee and others who have had a similar problem, I had exactly the same issue with my pro connect 9G with rear derailleur (LX). Here is a link to my long post that is explaining the problem. In fact, as Roblee, I discovered that the noise and rattling came from the chain slipping under...

Thank you very much flecc and walkerman for your welcome and you replies. I'll try your recommendations, flecc, and wil tell you how it goes. I'll be away for 2 weeks and reading through all these technical instructions wil take some time as well :-). So probably won't post too soon. But thank...

Hi, I realize that is my first post. So for short introduction, I bought my Proconnect C 9G (2010 version with derailleur) this summer from a major dealer near Paris. I've been very pleased with my bike so far. It really helps me to climb the hills on my commute from Paris to Jouy en Josas...