530 Chain Conversion - sprocket size & Chain length

[salty_monk]

Anyone want to remind me what sprocket sizes & chain length is needed for a GS1000 conversion to 530? The Z1 website doesn't work the way it used to on that front...

From Memory you have to go bigger (tooth wise) than stock to get the same sprocket relative diameter but that could be just hogwash & a smaller sprocket (dia) with the stock (15-43 from memory) tooth count might be what it needs...

Thanks

 

[Nessism]

15/42 is stock Dan so you need to move to something like an 18/50. I'm going off memory too but you want the largest sprocket you can fit in front for swingarm clearance.

The stock chain is 96 links x 6/8" = 72"

For 530 it's 5/8" between pins so you need 115 links.

 

[Guest]

To keep the same front sprocket pitch diameter you just multiply the number of teeth by the pitch ratio of the two chain sets. Stock is a 15 tooth 630 with a 3/4" pin spacing, so you want 15 * (6/5) = 18 tooth. You do the same for the rear and get 50.4 teeth, so you need to decide if you want slightly taller or shorter gearing than stock. These bikes have lots of torque so I would go to 50 tooth for relaxed highway riding. For chain length you do the same thing, as Ed shows. 96 * (6/5) = 115.2, round down to 115 and there you go.


Mark

 

[salty_monk]

Excellent - Someone should make that a Sticky!

Thanks!

 

[storm 64]

I am also planning on doing the 630-530 chain conversion on my 79 1000e. Does anyone know what motorcycle sprockets fit my 1000e? (Example, 1993 GSXR1000...) ??

 

[tkent02]

Why not get sprockets for a GS?

 

[Nessism]

I am also planning on doing the 630-530 chain conversion on my 79 1000e. Does anyone know what motorcycle sprockets fit my 1000e? (Example, 1993 GSXR1000...) ??

Go to Z1 Enterprises. They have detailed what specific sprockets fit.

 

[Guest]

I am also planning on doing the 630-530 chain conversion on my 79 1000e. Does anyone know what motorcycle sprockets fit my 1000e? (Example, 1993 GSXR1000...) ??

If Z1 doesn't sort you out, I went to JT Sprockets website and searched for GS and GSXR parts. Turns out my 82 1100E uses the same sprockets, front and rear, as all years of the GSXR 1100. It looks like your 1000E is the same thing, but confirm that for yourself. The JT sprockets part numbers I think you want are the JTF 513.XX front (the XX is number of teeth) and JTR 816.XX rear.

http://www.jtsprockets.com/

Why not get sprockets for a GS?

Who makes GS specific sprockets for 530 chain?


Mark

 

[hannibal]

Does the conversion require a spacer on the new front sprocket on the early GS750?

 

[salty_monk]

Anything that you convert from 630 to 530 will need a spacer

 

[tkent02]

Who makes GS specific sprockets for 530 chain?


Mark

Anybody. The 450s and 550s use 530 chains.

 

[hannibal]

That's what I thought. Jeff at Z1 said I didn't according to his JT manual.

 

[hannibal]

Anything that you convert from 630 to 530 will need a spacer

That's what I thought. Jeff at Z1 said I didn't according to his JT manual.

 

[Nessism]

A 530 chain is the same width as a 630 chain. The 3 in the size reference 3/8 roller width. Since the width is the same you don't need to worry about offset sprockets UNLESS the original sprocket was offset. In the case of the GS1000 I believe it WAS offset, thus you need a spacer. I'm not sure about the 750 however.

 

[Guest]

Anybody. The 450s and 550s use 530 chains.

I didn't realize the smaller bikes used the same sprocket details as the big bikes. I just looked at the JT Sprockets catalog and they list the same part #'s for the 550 as for all the GSXR's, so they are all the same thing.


Mark

 

[tkent02]

Front and rear sprockets are both the same?

 

[hannibal]

A 530 chain is the same width as a 630 chain. The 3 in the size reference 3/8 roller width. Since the width is the same you don't need to worry about offset sprockets UNLESS the original sprocket was offset. In the case of the GS1000 I believe it WAS offset, thus you need a spacer. I'm not sure about the 750 however.

This makes sense to me. Unless the rear sprocket has a different offset, no spacer would be needed. But if the rear offset is different, what I can't understand is how a spacer on the outside of the front sprocket creates the necessary offset.

A glance at the 750 and 1000 transmission diagrams suggests they're the same. Have to check them side by side when I get in front of my PC.

 

[tkent02]

When you put a 1000 engine in a 750 you don't have to do anything to the sprockets, they line up just fine.

 

[Guest]

Front and rear sprockets are both the same?

Yep, they list JTF-513.XX for the front and JTR-816.XX for the rear for all years of GSXR1100 (using the 530 conversion choices, since they also came with 630 for some years) and a couple of years of the 550 that I checked.


Mark

 

[salty_monk]

The spacer is just for the outside of the front sprocket. It has nothing to do with the position of the sprocket it's just because it's thinner & the nut would no longer touch the sprocket without one (i.e. not enough thread).