530 Chain Conversion - sprocket size & Chain length

[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.

[mmattockx]

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).

[Nessism]

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).

Ah yes, I'm starting to remember now. I knew there was a spacer involved.

[hannibal]

But why would you ever need to buy a spacer with a 630 to 530 conversion? If the sprokects are the same thickness, wouldn't you just reuse whatever spacer is currently between the nut and sprocket? And if there's no spacer from the factory, you shouldn't need one at all.

I'll still trying to get the cover off the front sprocket. Forgot how hard the old "phillips" screws are to remove. Hoping another evening or two with PB Blaster will do the trick.

[thebusdweller]

I just did this conversion on my 78 Gs1000. The stock countershaft sprocket has a heavy shoulder on the side that faces away from the motor. That's what the spacer makes up for. If the screw heads are stripped, drill the heads off with a 15/64 drill bit.

[Nessism]

But why would you ever need to buy a spacer with a 630 to 530 conversion? If the sprokects are the same thickness, wouldn't you just reuse whatever spacer is currently between the nut and sprocket? And if there's no spacer from the factory, you shouldn't need one at all.

I'll still trying to get the cover off the front sprocket. Forgot how hard the old "phillips" screws are to remove. Hoping another evening or two with PB Blaster will do the trick.

Get one of these...

[Joe Garfield]

Is this thread/mod about turning a shafty into a bike with a chain drive??

[mmattockx]

Is this thread/mod about turning a shafty into a bike with a chain drive??

Nope, it's about changing the chain/sprocket size on a GS1000 from the stock 630 to the much more common 530 size. 530 is more than strong enough, it's lighter, cheaper and offers more gearing choices and a vastly bigger selection of chain brand/type/quality options.


Mark

[storm 64]

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

I just received my JT sprockets and JT chain (Expert siries X1R X-ring Drive Chain) I ordered them from Z1 Enterprises. $150.59 to my door.(including shipping) I went with a 50 tooth rear sprocket and a 18 tooth front sprocket with 116 links of 530 chain. Check one more thing off my list👍 Oh, for reference this is for a 1979 GS1000e

[GSXR7ED]

530 Conversion!!!

This thread reminds me I need to complete this task. YES, there is a SPACER that was included in my order from Z1 for my "T". I also ordered OEM nut and washer.

Post Reference #193 http://www.thegsresources.com/_forum...hift-Oil/page5

18/49 Sprockets




Ed

[salty_monk]

Mine is still sitting on the shelf too! I might get to it this summer, along with the oil change and perhaps some new rubber.

[mrbill5491]

This thread reminds me I need to complete this task. YES, there is a SPACER that was included in my order from Z1 for my "T". I also ordered OEM nut and washer.

Post Reference #193 http://www.thegsresources.com/_forum...hift-Oil/page5

18/49 Sprockets




Ed

Hey! I've seen that somewhere huh lol.