Changing sprocket sizes (includes TOP TIP)

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Derick
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Joined: Tue Aug 25, 2015 7:28 am

Changing sprocket sizes (includes TOP TIP)

Post by Derick » Fri Sep 25, 2015 6:15 am

I've changed the front sprocket form 16 to 17 tooth and the rear from 42 to 41 tooth on my Nuda 900R. This changed the ratio of the 5th gear to be the same as the stock 6th gear on the Nuda900R and upped the 6th gears theoretical mph from 194mph to 211mph at 8000 rpm. I prefer this gearing for the type of roads where I live. The other bonus is getting a far greater MPG. I used to get about 42 to 48 MPG on standard sprockets now I can get 49 to 52 mpg. On one ride I got 54 mpg using Shells 98 octane fuel, but it was a slow and careful ride....
If anyone is interested; you can do some theoretical rear and front sprocket changes using http://www.gearingcommander.com/

TOP TIP
If the offset of the replacement rear sprocket is not the same as the OEM of the Nuda, use good quality washers to shim it out.
The picture shows the OEM 42 tooth sprocket on the left and my new 41 tooth sprocket on the right.
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Rear Skt1.jpg
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SharkFinn
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Joined: Fri Nov 07, 2014 10:18 pm
Location: Lahti, Finland

Re: Changing sprocket sizes (includes TOP TIP)

Post by SharkFinn » Fri Sep 25, 2015 6:56 am

As I mentioned before its a good bit of info this Derick. Me? I have just changed mine a few weeks ago but the next time I do I am very keen to do the 18T front sprocket mod. Other thread about that.

Derick
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Joined: Tue Aug 25, 2015 7:28 am

Re: Changing sprocket sizes (includes TOP TIP)

Post by Derick » Sat Feb 03, 2018 6:18 am

I now run 18T front and 41T Rear Sprockets... When I first used this setup I got a up to 70 mpg. However, because the bike was running lean, I have made my own boost plug so now get up to 65mpg and less snatchy throttle.

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Waynus
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Location: belgium

Re: Changing sprocket sizes (includes TOP TIP)

Post by Waynus » Sat Feb 03, 2018 1:10 pm

Do you know which brand makes the rear sprockets with the correct offset ?
I found out (couple of years ago) that AFAM doesn't...
I hereby swear to almighty Goddess Nuda that I will ride her as hard as I can and have all things needed to keep her running in peak form taking me to new heights everyday. Amen.

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Waynus
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Location: belgium

Re: Changing sprocket sizes (includes TOP TIP)

Post by Waynus » Thu Feb 22, 2018 10:06 am

No-one?
I hereby swear to almighty Goddess Nuda that I will ride her as hard as I can and have all things needed to keep her running in peak form taking me to new heights everyday. Amen.

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CSL
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Location: London

Re: Changing sprocket sizes (includes TOP TIP)

Post by CSL » Fri Feb 23, 2018 5:25 pm

When I changed mine on the old Nuda I went oem, so no idea unfortunately.

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