Gearing. - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 11 (permalink) Old 05-23-2014, 11:11 PM Thread Starter
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Gearing.

My SP2 has a 16 - 42 sprocket set up. It still seems like it's geared for the moon (geared for top end). Any suggestion on gearing???
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post #2 of 11 (permalink) Old 05-23-2014, 11:57 PM
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Gearing.

This has been covered a few times, but most members go with a 15/41 or 15/42 setup (depending on how and where you ride)

Makis recently did a good job explaining gearing recently.

https://www.rc51forums.com/forums/showthread.php?t=44138

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post #3 of 11 (permalink) Old 05-26-2014, 10:27 PM Thread Starter
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I understand gearing to the T. I raced for 14 years. Just was wondering what everyone else was using.

Actually the best way to go is to use a 520 set up with 15/42. DID Xring chain and AFAM sprockets. Thanks though.
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post #4 of 11 (permalink) Old 05-26-2014, 11:04 PM
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Originally Posted by KneeDragin View Post
I understand gearing to the T. I raced for 14 years. Just was wondering what everyone else was using.

Actually the best way to go is to use a 520 set up with 15/42. DID Xring chain and AFAM sprockets. Thanks though.
Why did you ask then
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post #5 of 11 (permalink) Old 05-26-2014, 11:22 PM
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Originally Posted by KneeDragin View Post
My SP2 has a 16 - 42 sprocket set up. It still seems like it's geared for the moon (geared for top end). Any suggestion on gearing???
Stock gearing is 16-40. That could be considered "geared to the moon"
16-42 is short gearing and a bit "longer" than the 15-40 one could try on a stock RC by changing only the front.
If the 16-42 appears to be "long" to you, I can't imagine why though, you could try a 15-42 out and see how the shoe fits in your needs.


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post #6 of 11 (permalink) Old 05-27-2014, 07:47 PM
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Did mine from stock to 15-42 not a fan really. Alot better than stock though.i think Next round going to do 15-40.
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post #7 of 11 (permalink) Old 05-29-2014, 11:06 PM Thread Starter
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Why did you ask then
I believe I already stated that I was just wanting to see what everyone else was using. A general consensus. You know, get info before spending 200 bucks on a chain and sprockets. AKA doing your homework to keep from spending money over and over on the same thing.

I was thinking maybe people in this forum like to chit chat about their Rc51's. Guess I was wrong.
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post #8 of 11 (permalink) Old 05-29-2014, 11:14 PM Thread Starter
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Originally Posted by MakisRC51 View Post
Stock gearing is 16-40. That could be considered "geared to the moon"
16-42 is short gearing and a bit "longer" than the 15-40 one could try on a stock RC by changing only the front.
If the 16-42 appears to be "long" to you, I can't imagine why though, you could try a 15-42 out and see how the shoe fits in your needs.
Thanks MakisRC51. I have a friend with a CBR 1000 and we did a side by side roll on in 5th and 6th starting a 75 mph. He left me standing still. However, if I was down 1 more gear I could stay right with him. Not that this is the best way to judge your gearing but it does give you a "general" idea.

I'm going to try a 15/42. If that's too short than I'll do a 15/41. Both with a 520 chain. The DID Xring 520 is just as strong as the 530 but lighter. Did some research on it. And we all know what less rotating mass equals. LOL.
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post #9 of 11 (permalink) Old 05-29-2014, 11:47 PM
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why not just leave the counter sprocket stock teeth, and go up on the rear however many?
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post #10 of 11 (permalink) Old 05-30-2014, 08:45 PM Thread Starter
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why not just leave the counter sprocket stock teeth, and go up on the rear however many?
1 tooth on the countershaft sprocket equals roughly 3 on the rear. Smaller tooth on the countershaft sprocket is a slight bit easier for the engine to turn as well. Also, less chain (less rotating mass = horse power) and should keep you within the chain adjustment specs as well as not shorten your wheelbase too much. All of which are minute changes that the average rider wouldn't notice. But I like to do things the right way and stay within the parameters that the bike was designed to be in geometrically. Except for the tall ass gearing, lol.
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