old 630 chain needs upgraded

[77 gs550]

Could someone please tell me (definatively) what size chain and sprokets to buy to change over my original chain from my 1977 gs 550.
(Page 95 of my repair manual is missing.)
I don't wish to change the ratio, simply replace what I have with the newer 520 (is it?) chain, and front & rear sprokets to match.
I see everyone recommend z1 enterprises, but what sizes am I looking for, and how many links (long) will that make the new chain I'm ordering?
Thanks. Terry

(New member, first post...help a brother out..)

[Billy Ricks]

Z1 will help you in figuring out the length of chain. You can go with 520 or 530. If you go with 520 you'll need to go to JT Sprockets website to see what to use. GSX-R and Katana sprockets will work. You just need to be a little careful because some of the GSX-R models used 5 hole patterns on the rear sprockets and from the late '90s on the bolt pattern changed completely. If you go with 520 or 530 use a front sprocket with more teeth than stock. More teeth up front will give the chain an easier path around the sprocket. Just keep the ratio the same as stock unless you want to play with them a little for either quicker acceleration or lower rpm on the highway. You can always get a longer chain than necessary and cut it down to fit your need.

[Billy Ricks]

Drum brake or disc on the rear? I'm looking at the JT site to see what will work for you. BTW, JT shows you should have a 530 chain and sprockets with a 15/50 sprocket combo for a 3.33 ratio.

[Billy Ricks]

Okay, brake type won't matter. Here's the page from JT for your model.http://www.jtsprockets.com/52.0.html...el_uid=4937&p= I don't see a 520 conversion that will work for you, only the stock 530.

[Billy Ricks]

Disc brake uses 108 links and drum 110. Both use the 15/50 sprocket combo.

[Nessism]

Your bike came stock with a 530 chain. It was the larger GS bikes that came with 630's.

Stock sprockets were 15 tooth front, 50 tooth rear. 108-110 link chain depending on application.

JT makes affordable sprockets: JTF 513 front, JTR 816 rear.

http://www.jtsprockets.com/52.0.html?&L=0

An RK O-ring chain is a good chain for a reasonable price.

http://mawonline.com/rk.htm#Chains

Edit: Billy beat me to this info - he posted while I was typing.

[Billy Ricks]

Your bike came stock with a 530 chain. It was the larger GS bikes that came with 630's.

Stock sprockets were 15 tooth front, 50 tooth rear. 108-110 link chain depending on application.

JT makes affordable sprockets: JTF 513 front, JTR 816 rear.

http://www.jtsprockets.com/52.0.html?&L=0

An RK O-ring chain is a good chain for a reasonable price.

http://mawonline.com/rk.htm#Chains

Edit: Billy beat me to this info - he posted while I was typing.

I guess great, or warped, minds think alike.

[Nessism]

I guess great, or warped, minds think alike.

Warped?8-[\\/

Z1 Enterprises is a smig high for their chains but they are such a good vendor it's worth supporting them.

http://z1enterprises.com/catalog.aspx?pid=GS550B-1977-MP0

[77 gs550]

I knew you'd come through

Thanks to all who have helped me here.
I will now immediately order the correct parts for my application.
And get back on the road...

[Billy Ricks]

Glad to help, that's what this site is supposed to be about.