有鉴于，以往听到的链条寿命都是
"阿就调练器调到底就该换啦"
每台车调练器长度都不一样...
"阿就炼目卡死就该换啦"
阿杯的车机油涂那么多用到死也不会卡住....
"阿就看起来松松的就该换啦"
这.........
所以一直以来都不知道到底要如何去评估链条的寿命逊后来看到ER6的手册，才发现确实有明确的方法去评估链条寿命的
http://imgur.com/a/BYyw9
大意如下
1.在链条下方挂上10公斤的重物
2.测量上方链条，20目之间的距离
3.超过323mm以上的话，必须更换链条
以上 DID520 114目 链条为标准
‧ Remove the chain cover (see Swingarm Removal in the
Suspension chapter).
‧ Rotate the rear wheel to inspect the drive chain for damaged
rollers, and loose pins and links.
If there is any irregularity, replace the drive chain.
Lubricate the drive chain if it appears dry.
‧ Stretch the chain taut by hanging a 98 N (10 kg, 20 lb)
weight [A] on the chain.
‧ Measure the length of 20 links [B] on the straight part [C] of
the chain from the pin center of the 1st pin to the pin center
of the 21st pin. Since the chain may wear unevenly, take
measurements at several places.
If any measurements exceed the service limit, replace the
chain. Also, replace the front and rear sprockets when the
drive chain is replaced.
Drive Chain 20-link Length
Standard: 317.5 318.2 mm
Service Limit: 323 mm
Standard Chain
Make: DAIDO
Type: DID 520VP2-T
Link: 114 links