03-03-2011, 07:39 PM | #1 |
Join Date: Feb 2011
Location: Nova Scotia
Posts: 27
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Gio X31 Rear Sprocket Replacement, suggestion??
I am looking for a 428 chain, 49 tooth sprocket, with enough material in the center to machine new holes, because the rear sprocket has bolt holes that are 68mm center to center, with a cut out of approx. 53mm.
Any ideas. I have access to some machines but I cannot machine a custom sprocket. |
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03-03-2011, 08:20 PM | #2 |
Join Date: Feb 2011
Location: Nova Scotia
Posts: 27
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Answered own question, DS80 1982-2003.
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03-03-2011, 10:22 PM | #3 |
Join Date: Mar 2007
Location: Abbotsford, BC, Canada
Posts: 4,880
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Glad to hear you got it figured out
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03-04-2011, 12:52 AM | #4 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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I don't think I understand. Is it that you're trying to fit a 49 tooth, but you couldn't find a direct fit?
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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03-04-2011, 03:04 AM | #5 |
Join Date: Mar 2007
Location: Abbotsford, BC, Canada
Posts: 4,880
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I think he found a sprocket off a 82-03 DS80 that is a direct fit?
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03-04-2011, 08:37 AM | #6 |
Join Date: Feb 2011
Location: Nova Scotia
Posts: 27
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That's correct a 79-2003 ds80 sprocket is almost a direct fit, the center section needs approx. 2mm machined out. Lots of options, i think like 35-50 teeth.
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03-04-2011, 10:16 AM | #7 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Sorry, I'm still stuck on the machining point. Do you mean that you can't find an exact fit replacement sprocket for your Gio?
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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03-04-2011, 10:45 AM | #8 |
Join Date: Feb 2011
Location: Nova Scotia
Posts: 27
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Ok, let me start from square one. The ratio for that stock gio 2007 x31 19/16 was 15 front, 48 rear. Or 3.2, for an mx bike the ratio should be between 3.5 to 5. So what I want is some tunability for my gearing.
I went to a 14 Front, and now I want a 49 tooth rear or even a 50 rear, that puts me at a 3.5 to 3.57 respectively. The stock rear available from gio is only 48 teeth. Catch my drift. I am not racing anybody so I don't really care if I lose some top end, but it will make japanese riders wonder whats happening. |
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03-04-2011, 10:48 AM | #9 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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I get that you want to play with ratios; I've done plenty of that. I'm just surprised that you can't find a direct fit replacement sprocket that doesn't need modification.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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