Chain and sprockets

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SBK-SP said:
This is just wrong ^^^^.
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thanks for your detailed explanation. ive swapped chains on several v4 panigales and swapped both the sprockets and the sprocket carriers. ive also increased the length of the chain to get the adjustment working in a different position and to lengthen the wheel base...

the position of the spindle relative to the hub for a std chain length and std size sprockets works in the arc between 09 and 12 so for the first year or so of a chains adjustment it is well within this arc. this has the effect of lowering the ride height every time it adjusted.
 
Scammer. Hacked an abandoned account that likely had a weak password and no 2-factor authentication.

Before the flurry of posts today, the last one with that user name was 2017.
 
Picked up a 42t Sitta non-quick change. Less moving parts the better in my opinion. Also looks like the Barni Racing CIV bike uses the same
 

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Installed the 1-piece SITTA 42t rear sprocket this evening on the bike and not too bad of a job. Hardest part is getting the 230 Nm nut off. Took a good 30 sec of impact wrench to get that nut off (usually I last longer, promise). Will probably replace the cush pins in another 4k or when either the chain/sprocket wears beyond spec. The weight savings is not as much as you’d think. Maybe a pound or so. Like @SBK-SP said, 15-42 gets you to very close to stock on the eccentric.

One notable observation was that the SITTA sprocket is 0.5 mm narrower than the stock sprocket. Confirmed at least by packaging and stamping that it is 525. Will keep an eye out for wear.

Also, with alu sprockets the key thing will be keeping it clean to prolong life. Grit will chew it up quick.

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spooky said:
It’s not really addressing my questions but the OEM chain had stretched significantly, was previously adjusted and needs adjusting again. It’s done 1,200km on road and 12 days on track and I want to change it.
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Chains stretch frequently during the first 1000 odd km based on usage and then slow down. Your chain is just broken in. Chains on all my liter bikes have lasted 20,000+ miles with regular lube and maintenence. Unless you just want to throw money replacing a perfectly new chain, 0 benefits from this mod.
 
djducatista said:
Chains stretch frequently during the first 1000 odd km based on usage and then slow down. Your chain is just broken in. Chains on all my liter bikes have lasted 20,000+ miles with regular lube and maintenence. Unless you just want to throw money replacing a perfectly new chain, 0 benefits from this mod.
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You have a 520 chain? Those 20,000+ miles have been on track?

Rregardless, I expect my chain is fine for a while yet. That doesn’t mean I can’t discuss and purchase replacement parts to use either when I feel that I need to or just because I want to.

There are technical benefits to lighter parts though, so it’s incorrect to say there are zero benefits (the topic is ‘chain and sprockets’ - not just ‘chain’).
 
SuperDomestique said:
Installed the 1-piece SITTA 42t rear sprocket this evening on the bike and not too bad of a job. Hardest part is getting the 230 Nm nut off. Took a good 30 sec of impact wrench to get that nut off (usually I last longer, promise). Will probably replace the cush pins in another 4k or when either the chain/sprocket wears beyond spec. The weight savings is not as much as you’d think. Maybe a pound or so. Like @SBK-SP said, 15-42 gets you to very close to stock on the eccentric.

One notable observation was that the SITTA sprocket is 0.5 mm narrower than the stock sprocket. Confirmed at least by packaging and stamping that it is 525. Will keep an eye out for wear.

Also, with alu sprockets the key thing will be keeping it clean to prolong life. Grit will chew it up quick.
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Looks nice - OEM sprocket carrier?

Are you comparing the weight to the OEM sprocket? The 520 Sitta should be about 700g lighter than the OEM SP2 520 sprocket, which is quite a lot, and further weight savings can be had with the chain (about 400g lighter than OEM) and the flange (not so much of a weight saving available). Measurements courtesy of the Motomillion video on chain and sprockets for their SP2.

So just the chain and sprocket would save about 1kg of rotating mass, which I think is quite significant.

Regarding the nut, at a track day there was a guy who owned a Ducati dealership - he had a wrench with a multiplier fitted and he hardly had to put any effort into removing and installing the nut. I should have asked him exactly what it was as it made the job look easy.
 

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