Yamaha PW SYSTEM Manual page 8

Guide to maintaining your E-bike
For your own safety and to maintain the right to claim, it is important that the bicycle is maintained.
Good maintenance makes cycling more enjoyable, and the bike will last longer. We therefore
recommend reading the instructions thoroughly.
Many people can handle most of the maintenance themselves, but bicycles are often equipped
with complicated fine mechanics, which we would advise to have serviced and maintained at the
bicycle dealer.
This manual provides tips and guidance on components and parts that require special
attention.
The chain
All chains - also stainless - must be regularly wiped, lubricated and adjusted. A clean and well-
maintained chain provides greater riding joy, the risk of breakage is reduced and the load on the
gear and hub is minimized.
Chains on bicycles with internal gears (hub gears)
It is important to ensure that the chain is correctly tensioned. At the center of the free length of the
chain, the clearance up and down must be a maximum of 20 mm. On the other hand, the chain
must not be too tight, as a chain that is too tight can cause damage to the rear wheel bearings.
Brake arm bolt
To adjust the chain, loosen the hub nuts and the bolt in the rear hub brake arm. Then move the rear
wheel forward or backward so that the chain gets the desired clearance. Remember to tighten the
hub nuts and the brake arm bolt and check that the wheel sits right in the middle of the rear fork.
Chains on bicycles with external gears (derailleur gear)
The chain is automatically tensioned by the chain guide arm of the gear. If the chain needs to be
changed, it is recommended to contact your bicycle dealer, as the chain must have the correct
length and often the chain and sprocket must be changed at the same time.
Useful links:
www.shimano.com
www.support.enviolo.com
Hub nut
8
Max 20 mm
clearance