I used GP428XW, but when I was doing Chain cleaning the other day, I found sticking.
Engine tuned to SR 400 for two years and four months at just 2,000 km commute commuting, town riding, used for touring and used for rain commuting and lubricating once / If you are busy with the moon for about 2 months No lubrication and harsh use.
Actually I wanted 520 but it was a time when there was no iron Sprocket, so I forgot to make it 428.
There is no problem except sticking, there is almost no elongation after the initial stage, the wear of the Sprocket is also small.
New car (25 years ago) 428 is 1. Because it was exchanged at 4 thousand kilometers, it can be said that lifetime is up when it sees from that.
The next 520 Seal chain is 2. Longer life is 40,000 km thick, and 530 Seal chain is 3. It was 5 thousand kilometers.
Considering that it is time to reduce the Sprocket and Chain exchange to be the same, I think that it is 520 for my SR.
Currently 520 Iron Sprocket is sold so it is currently 520.
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