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Motorcycle Racing Forum

Motorcycle Racing => Wrenching => Topic started by: dman01 on April 18, 2004, 08:31:17 PM

Title: Gearing at R.A. on SV 650???
Post by: dman01 on April 18, 2004, 08:31:17 PM
Can anybody help  me with what gearing to run at Road America on a SV650.
Title: Re: Gearing at R.A. on SV 650???
Post by: tzracer on April 19, 2004, 11:09:22 AM
I am starting with 16/43. Another rider (Jason D'Amico) told me he had used 16/42. I am assuming that we will not be using the Kink. This may cause some gearing changes.
Title: Re: Gearing at R.A. on SV 650???
Post by: dman01 on April 19, 2004, 03:51:48 PM
Hey Brian, thanks for the info.  Now I,m gonna have use it so I cah catch you in supertwins at R.A.  Ha Ha Ha, see you up there.
          Lee Davis
                          am#186
Title: Re: Gearing at R.A. on SV 650???
Post by: EM JAY on April 20, 2004, 07:21:55 AM
QuoteI am starting with 16/43. Another rider (Jason D'Amico) told me he had used 16/42. I am assuming that we will not be using the Kink. This may cause some gearing changes.
16/43 = 15/46 right?  Why would we not use the kink?   ???
Title: Re: Gearing at R.A. on SV 650???
Post by: Dawn on April 20, 2004, 07:38:26 AM
For the AMA they put in "the bend" to slow people down going through the kink because it was just "too dangerous."

Since the AMA uses the bend, I don't know why we wouldn't be using it too...    

Dawn  
Title: Re: Gearing at R.A. on SV 650???
Post by: Nate R on April 20, 2004, 10:16:34 AM
NESBA used the bend, too.
Title: Re: Gearing at R.A. on SV 650???
Post by: tzracer on April 20, 2004, 01:10:37 PM
Damn, didn't know that was you Lee. The correct gearing is 13/50.

43/16 = 2.6875
46/15 = 3.0667
40/15 = 2.6667
41/15 = 2.7333

43/16 is closer to 40/15. Here is how to calculate. Divide 43 by 16 then multiply by 15 to get rear sprocket.

(43/16)*15 = 40.3125

The Bend was added to slow speeds through the Kink. RA will probably require all motorcycles to use the Bend.
Title: Re: Gearing at R.A. on SV 650???
Post by: dman01 on April 20, 2004, 09:47:04 PM
Too late now Brian ZZZZZZZZZZZZoom, there I go again. ;D

        SV POWER !!!!!!
Title: Re: Gearing at R.A. on SV 650???
Post by: watsonx11 on April 21, 2004, 06:38:21 PM
QuoteDamn, didn't know that was you Lee. The correct gearing is 13/50.

43/16 = 2.6875
46/15 = 3.0667
40/15 = 2.6667
41/15 = 2.7333

43/16 is closer to 40/15. Here is how to calculate. Divide 43 by 16 then multiply by 15 to get rear sprocket.

(43/16)*15 = 40.3125

The Bend was added to slow speeds through the Kink. RA will probably require all motorcycles to use the Bend.

What is the 15 for, the way I have always done it, and been taught to do it is to divide the front by the rear,

16/43 = .372
15/46 = .326
15/47 = .319

As you can see 16/43 is geared higher than a 15/46.


Title: Re: Gearing at R.A. on SV 650???
Post by: tzracer on April 26, 2004, 07:50:36 AM
QuoteWhat is the 15 for, the way I have always done it, and been taught to do it is to divide the front by the rear,

16/43 = .372
15/46 = .326
15/47 = .319

As you can see 16/43 is geared higher than a 15/46.



The 15 was to calculate the equivalent gearing using a 15 tooth front sprocket. Most of the people I learned from divide the rear sprocket by the countershaft sprocket.
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