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Discussion Starter #1
I'm trying to determine if the previous owner changed the sprocket. I am turning 70-72 mph at 4000 RPM, and 4500 at 80-82 in sixth gear on my '08 1100S. Is this a 15-tooth or 14-tooth?

I've also read that a different chain (520 pitch instead of 525) is required when going to the 14-tooth, and I'm wonder if that is true? It wasn't the case with previous motorcycles of mine.

Thanks!
 

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I'm trying to determine if the previous owner changed the sprocket. I am turning 70-72 mph at 4000 RPM, and 4500 at 80-82 in sixth gear on my '08 1100S. Is this a 15-tooth or 14-tooth?

I've also read that a different chain (520 pitch instead of 525) is required when going to the 14-tooth, and I'm wonder if that is true? It wasn't the case with previous motorcycles of mine.

Thanks!
Why not expose it and count the teeth? You don't have to take it off.
I hope you read wrong. I just installed the 14T and kept my stock chain.
 

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Old Wizard
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I'm trying to determine if the previous owner changed the sprocket. I am turning 70-72 mph at 4000 RPM, and 4500 at 80-82 in sixth gear on my '08 1100S. Is this a 15-tooth or 14-tooth?

I've also read that a different chain (520 pitch instead of 525) is required when going to the 14-tooth, and I'm wonder if that is true? It wasn't the case with previous motorcycles of mine.

Thanks!
You have a 15-tooth front sprocket.

The 520 and 525 chains have the same link pin-to-pin length so you can use the same chain. Just make sure that the replacement 14-tooth sprocket is also a 525.

525
plate thickness: 2.0 mm
roller length: 22.95 mm
pin-to-pin distance: 15.875 mm

520
plate thickness: 2.2 mm
roller length: 20.20 mm
pin-to-pin distance: 15.875 mm
 

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Discussion Starter #9
Excellent. Thank you, everyone! And yes, I will count to confirm.

The thing I saw about the chain pitch was on Pro Italia. Their 14t under "Hypermotard final drive" showed as being only compatible with a 520 chain, so I (apparently incorrectly) assumed this was the 14t that everyone else is using.

I'll take a look around for a 14t for a 525 chain -- after I count the teeth. :)
 
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