98 f3 sprocket sizes - Honda Motorcycles - FireBlades.org
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post #1 of 9 Old 08-29-2017, 12:45 PM Thread Starter
 
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98 f3 sprocket sizes

Hello to all, it's time for fresh chain and sprockets on my 98 f3. Do you guys run stock 15 - 43 with a 525 or -1 -?
I do a lot of freeway driving... Shop recommends -1 (14) -5 (38). what do you think?
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post #2 of 9 Old 08-29-2017, 1:19 PM
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Re: 98 f3 sprocket sizes

When I used to do a LOT of highway riding, I chose a +1F -3R setup (with new chain). I was quite pleased with the lower RPMs at speed, increased fuel economy, and "extended" mileage I'd get from a tank of fuel.

Unless you're looking to set a new land-speed record, the aforementioned -1F -5R sounds a bit much unless they're looking to sell you a new clutch as well

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post #3 of 9 Old 08-29-2017, 3:16 PM Thread Starter
 
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Re: 98 f3 sprocket sizes

Thank you for the reply. Did you have to slip the clutch to start?
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post #4 of 9 Old 08-29-2017, 6:05 PM
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Re: 98 f3 sprocket sizes

Nothing significant with the +1/-3... but I surely wouldn't recommend many "in town" shenanigans with that set-up

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post #5 of 9 Old 08-30-2017, 12:59 PM
 
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Re: 98 f3 sprocket sizes

Quote:
Originally Posted by unslow1 View Post
When I used to do a LOT of highway riding, I chose a +1F -3R setup (with new chain). I was quite pleased with the lower RPMs at speed, increased fuel economy, and "extended" mileage I'd get from a tank of fuel.

Unless you're looking to set a new land-speed record, the aforementioned -1F -5R sounds a bit much unless they're looking to sell you a new clutch as well
So I've heard it said that a change of 1 tooth front is equivalent to 3 on the rear.
Following that reasoning, your ratio is the same as stock.
You said lower rpms at speed now - so you gained some top-end, but lost just a little power or quickness at lower rpms?

Since most folks go the opposite way, like my -1+2, I'm just trying to wrap my head around your setup. I understand your intent was different than mine, but your end choice seems like it would have minimal effect. How big of a change was it?
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post #6 of 9 Old 08-30-2017, 5:41 PM
 
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Re: 98 f3 sprocket sizes

To figure out what you want and compare it to what you have, divide the "rear" by the "front". 43 divide by 15 = 2.87
The shop recommendation 38 divide be 14 = 2.71. Not a whole lot of difference. Save your money, get the 520 conversion, 525 aint worth it. More options available with 530 or 520. Now a 42 rear with a 16 front. only 1 tooth difference on each end than stock = 2.63.
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post #7 of 9 Old 08-30-2017, 6:20 PM
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Re: 98 f3 sprocket sizes

Quote:
Originally Posted by jondog9 View Post
So I've heard it said that a change of 1 tooth front is equivalent to 3 on the rear.
I've heard that too Jon... dropping one in the front is like adding three in the rear.

Quote:
Originally Posted by jondog9 View Post
Following that reasoning, your ratio is the same as stock.
Almost... adding one in the front was like dropping 3 in the rear. That, accompanied by the 40T rear (-3) would be like having a 37T rear.

as per @coalminer frank 's formula:
16/43= 2.687 (OEM)
17/40= 2.353 (Casey's old highway set-up)
16/37= 2.312 (just for reference. never heard of a 37T rear)

15/45= 3.000 (Casey's RR3)
15/47= 3.133 (Casey's RR2)

Quote:
Originally Posted by jondog9 View Post
You said lower rpms at speed now - so you gained some top-end, but lost just a little power or quickness at lower rpms?
yup.

Quote:
Originally Posted by jondog9 View Post
Since most folks go the opposite way, like my -1+2, I'm just trying to wrap my head around your setup. I understand your intent was different than mine, but your end choice seems like it would have minimal effect. How big of a change was it?
That was almost 10 years ago, mi amigo. I remember it being "lethargic" when getting back on the on-ramps after fuel fill-ups during long trips. Although while on the Interstates, my memory is of less vibration in the bars and MsPG being in the upper 40s.

Currently my RR2 is 15/47 (-1/+4) and my RR3 is 15/45. Both with 520 "conversions".
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post #8 of 9 Old 08-30-2017, 6:26 PM
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Re: 98 f3 sprocket sizes

Quote:
Originally Posted by unslow1 View Post
-1F -5R sounds a bit much unless they're looking to sell you a new clutch as well
I know I typed this... but for some reason I READ it as +1/-5

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post #9 of 9 Old 08-31-2017, 1:42 AM
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Re: 98 f3 sprocket sizes

Quote:
Originally Posted by Bishk View Post
Hello to all, it's time for fresh chain and sprockets on my 98 f3. Do you guys run stock 15 - 43 with a 525 or -1 -?
I do a lot of freeway driving... Shop recommends -1 (14) -5 (38). what do you think?
Have a look at this
Gearing Commander ⚙
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