43T rear sprocket - new chain? - MVAgusta.net
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post #1 of 12 (permalink) Old 10-11-2017, 03:53 AM Thread Starter
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43T rear sprocket - new chain?

Hiya,

I'm going to change the rear sprocket for a 43T (750S) and just wondered if I'll need a new chain?

I suspect so as the current chain won't be long enough but the current one is in very good condition with low wear rate.

Of course I suspect I'll struggle to find a 530 pitch sprocket anyway so will probably need a front and chain as a result.

Thanks
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post #2 of 12 (permalink) Old 10-11-2017, 04:09 AM
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Generally, the drive is replaced as a set.

Why do you have a 530 setup? These bikes come stock with a 525 pitch and most folks reduce that to a 520.

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post #3 of 12 (permalink) Old 10-11-2017, 07:49 AM Thread Starter
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Quote:
Originally Posted by silentservice703 View Post
Generally, the drive is replaced as a set.

Why do you have a 530 setup? These bikes come stock with a 525 pitch and most folks reduce that to a 520.
My mistake, I thought it was a 530 as standard from what I read. That's helpful to know - thanks.
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post #4 of 12 (permalink) Old 10-11-2017, 08:38 AM
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@biaggi: What is your source for information?

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post #5 of 12 (permalink) Old 10-11-2017, 11:16 AM Thread Starter
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On here - from reading old threads when trying to find out about chain length - or so I thought, I must have misread/misremembered.
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post #6 of 12 (permalink) Old 10-12-2017, 11:14 PM
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Standard chain on a 750 would be a 520 in my experience.
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post #7 of 12 (permalink) Old 10-13-2017, 04:09 AM
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It will be marked on the link plates.

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post #8 of 12 (permalink) Old 10-13-2017, 05:46 AM
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Back to the original question.....there is a fair amount of chain adjustment available in the rear hub. My SPR came with a selection of 3 different size rear sprockets (chain wheels), all of which could be fitted with the standard chain.

Be aware your ride height will change with chain adjustment. So what is the current tooth count? Going from 40 to 43 may be possible with existing chain. Going from 37 to 43 may not.

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post #9 of 12 (permalink) Old 10-13-2017, 06:40 AM
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FWIW, I just went from 43T to 40T on my Brutale 910S and I removed 1 link to bring my hub back to roughly the mid adjustment point. The new ratios suit my daily ride better than stock and as a bonus I found that my previously 'optimistic' speedo was pretty well on the money when I mounted a satnav to check its accuracy with the new sprocket ratios.
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post #10 of 12 (permalink) Old 10-13-2017, 07:23 AM Thread Starter
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Quote:
Originally Posted by esq'z me View Post
Back to the original question.....there is a fair amount of chain adjustment available in the rear hub. My SPR came with a selection of 3 different size rear sprockets (chain wheels), all of which could be fitted with the standard chain.

Be aware your ride height will change with chain adjustment. So what is the current tooth count? Going from 40 to 43 may be possible with existing chain. Going from 37 to 43 may not.
Lots of good info from all - thanks.

So with a bit more checking - it's a 520 chain and 41 rear. I've just got a rear carrier from a later F4 so will get the right sprocket for it, plus a spacer (as per other threads on this mod), and try that with the standard chain, whilst factoring in the ride height.

With only 2K miles on the chain and sprockets it seems a waste to change them without trying first.

All good tinkering!
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