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You're always welcome to call Stuart, I don't mind giving time to anyone if I have it :) We have fitted a better crankshaft seal and packed water resistant grease between the motor cover and the outer facing bearings, this helps a little. I think plastering a good tacky waterproof grease...

Motor mileage is un-quantifiable due to the amount of variables e.g. Riding terrain, weather conditions, washing habits, how you transport your bike etc. There are still E8000 motors out there running like yours, so we don't yet know what their ultimate mileage in the optimum conditions would...

Don't let this put you off Stuart, you will be fine if you just keep an ear out for anything untoward and get it looked at sooner rather than later. Many people do thousands of happy trouble free miles. Don't forget we also see these motors in near perfect condition after 60,000 + miles...

More info on Gen 4 "seals"

This is a good question actually. The Bosch Gen 4 has a cover that sits over both left and right crankshaft bearings. These are half way between a seal and a shield. The idea is that they are removed after un undisclosed period of time, cleaned and re-greased or replaced (they do wear out). If...

Preventative DIY is only really possible with the Bosch Gen 4. All other motors are more or less fit and forget. If your motor is still in warranty, don't touch it. Other than that, we tend to advocate people fixing their own things, we sell all the bits and offer help if needed. However, the...

Thank you, We have just made an EP8 bearing kit and this will be available within the next 2 or 3 weeks. We are also considering offering a repair service for this particular motor too.

You would be surprised at whats fixable! Just bear in mind that every turn of the pedal is costing you more money :unsure: