15/44 Sprockets: Fantastic! - Ducati.ms - The Ultimate Ducati Forum
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post #1 of 8 (permalink) Old Aug 13th, 2019, 6:08 am Thread Starter
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15/44 Sprockets: Fantastic!

Well, I've changed to 15/44 gearing and am really pleased with the result. I've been running with 14/42 for ten years and was never happy with the way the chain ran against the chain guide on the swinging arm, so when the time came for new chain and sprockets I took the opportunity to improve things.

14/42 is equal to 15/45 = 3.00, but apart from 45t sprockets being unavailable, I thought that I'd get away with upping the gearing one tooth and 15/44 is equal to 14/41 = 2.93. When running the 14/42 the transmission was very noisy and snatchy, and I could feel the vibration from the chain running against the swinging arm. With the new set up the it is much quieter and smooth and the gearchange is improved too.

I was amazed at the condition of the 14t Renthal front sprocket that I took off, it appeared to have hardly been run after 10,000 miles and the new 15t Renthal is a beautiful thing, superbly made and finished. The rear sprocket that I fitted is made by Talon and is not as well finished as a Renthal, and is not hard anodised either, but Renthal do not make a 44t for our bikes, so I will have to see how it lasts.

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post #2 of 8 (permalink) Old Aug 13th, 2019, 7:11 am
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Nice to hear

What about the clearance between the chain and chain guard?

Ciaoooo
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post #3 of 8 (permalink) Old Aug 14th, 2019, 2:33 am Thread Starter
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The 44 is only 1cm bigger diameter than the 42 which I've been running and there seems to be enough clearance between the chainguard so far, and that was with me leaving quite a bit of slack in the chain for the first run, so, fingers crossed, no problem.

What has surprised me is that the gearchange is more linear - with the 14t front it felt like I was applying the brake between upward changes when riding slowly, but now the engine seems to pull the next gear straight away; maybe the friction of the chain against the chain guide was noticeable.

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post #4 of 8 (permalink) Old Aug 14th, 2019, 4:58 pm
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Quote:
Originally Posted by Duccout View Post
The 44 is only 1cm bigger diameter than the 42 which I've been running and there seems to be enough clearance between the chainguard so far.....


Hello Duccout

Nice to hear.

Are you using the stock chain guard or a hugger-chain guard combo???

Ciaoooo

Moller
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post #5 of 8 (permalink) Old Aug 14th, 2019, 6:09 pm
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Funny, I just got a 39T to put on my old SS because the previous owner had put a 41T on it.

I don't hate the 41T, but I do dislike it on the SS. Too many revs at 110kph...

The old Monster will be due for a new sprocket soon, I may keep it and put it on my "city" bike.
.

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post #6 of 8 (permalink) Old Aug 15th, 2019, 1:10 am Thread Starter
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Hi Moller,

I am using a hugger from QB World of Carbon.

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post #7 of 8 (permalink) Old Aug 15th, 2019, 12:26 pm
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We go fast in Germany... the 15-39 combo is perfect in my opinion... i want to feel the torque... this is not a four cylinder bike
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post #8 of 8 (permalink) Old Aug 16th, 2019, 12:33 am Thread Starter
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We CAN't go fast in the UK - 65 million people in a tiny island with speed cameras, traffic lights and roundabouts everywhere. Put it like this the population of the UK is the same as that of France, but France is four times bigger.

With 15/39 gearing I'd be running around in third gear all the time!
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