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Gearing

1491 Views 4 Replies 4 Participants Last post by Ducmans, Feb 28, 2006

phonse

Discussion Starter · Jan 12, 2006

Recently I had to replace the sprockets on my 97 900ss/sp.
I was in a hurry and made the mistake of going to the dealership. I now have the OEM sprockets which are lousy for highway cruising.
What sprocket combination are you using to obtain good highway rpm levels.
Right now at 70mph I am at 4500 rpm. Use to be around 4100 or less.

Al "phonse" B.

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gomura

· #2 · Jan 12, 2006

You might want to check Moto-One in their ducati gearing section for some general info:

http://www.moto-one.com.au/performance/ducgearing.html

I had to read it a few times to understand what the author was trying to say, but it seems like some good stuff.

BTW, my little 750 churns around 5K at 70mph (14t front) so don't feel bad...

George

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Kalaazar

· #3 · Feb 26, 2006

A couple of years ago I did a trip to Michigan from Oregon with my '96 SS/CR. I fitted a 35tooth rear sprocket on and got fabulous gas mileage! I could get just over 200 miles per tank. 70mph was at a tad under 4krpm in sixth gear. Most comfortable journey I've ever taken!

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· #4 · Feb 27, 2006

Your bike now is pulling more RPM's at speed, which means they geared the bike down. I would double check the size of sprockets that were installed.

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Ducmans

· #5 · Feb 28, 2006

Calculate different sprockets

phonse said:
Recently I had to replace the sprockets on my 97 900ss/sp.
I was in a hurry and made the mistake of going to the dealership. I now have the OEM sprockets which are lousy for highway cruising.
What sprocket combination are you using to obtain good highway rpm levels.
Right now at 70mph I am at 4500 rpm. Use to be around 4100 or less.

Al "phonse" B.

Please send me the technical gearing details of the '97 900SS and I'll put it in with the default settings in my gearing calculator: http://www.xs4all.nl/~ator0437/GRSSC.htm
Then you'll be able to calculate the wanted front and rear sprockets for a certain speed and rpm.

Kind regards, Jean

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