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630 to 530 chain/sprockets on 1981 GS750L - Do it?

Andrew Vanis

Andrew Vanis

Forum Mentor
Past Site Supporter
630 to 530 chain/sprockets on 1981 GS750L - Do it? Looks like the OEM teeth counts are 15 front 40 rear

It's time to replace my front sprocket (and the chain has lost many O-rings).

Typically I'm a "stock" guy on stuff so I don't have to remember what I updated. But the 530 argument has been around for a while. so the questions are:

1) for this specific bike 1981 GS750L, is the 530 worth doing and why?

This Z1 article mainly says $10-$15 chain savings (but then there are spacer costs) - https://www.z1enterprises.com/blog/how-to-convert-from-630-chain-to-530-chain/

2) what specs of 530 sprockets/chain would be appropriate?

2.1) any thoughts on changing the sprocket rations? I am fine with how the bike rides now.

Thanks,
Andy
 
Front sprocket is 15T 630, replace with 18T 530 to maintain the same diameter.

Origional ratio = 40/15 = 2.667

Rear sprocket = 2.667x18 = 48T

Origional chain = 96 links x 3/4" between links = 72" long chain

For a 530 chain, which uses 5/8" between links, you have 72/(5/8) = 115.3, so use a 116 link 530 chain.

530 is lighter, quieter, lower-friction, and cheaper than 630. Not to mention, 630 chains are lower grade than the better 530 chains.
 
Thank's guys... What about spacers or anything else that might be needed for the conversion?
 
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