What was wrong with 630 then? Not arguing, I've read a lot of posts about it and I'm curious about what the problem is.
The #630 chain manufactured 33 years ago is very weak and they did break all the time. It is a massively heavy chain also.
The more modern chains like the #530 chain is used on 121 Hp bikes with no problems Like the Honda VF1000R. Just better manufacturing and testing.
Many engine cases on Honda CB750's were damaged when chains broke by the #630's massive weight. The 77-78 CB750k's had a thicker engine case in that area but it still got broken.
The 1979's had a special metal plate bolted near the front sprocket to help prevent engine case damage from those massive #630 chains.
By switching to the #530 regular chain it will save a lot of weight, and is very unlikely to break like the old #630 chains did.
If you do not believe me, ask Cycle-x how many broken engine cases they see from this chain damage.
Think about this. If a chain broke and you were standing in its path, which one would hurt you the most....The heavy chain or a light weight chain?
