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Author Topic: 15t sprocket  (Read 15533 times)

Offline Bowman

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15t sprocket
« on: December 02, 2005, 09:27:57 PM »
I guess this is the right section for this question. I'm dropping the front to a 15 on my Busa. First is this too low? How much of a difference will I notice and also how bad is it gonna throw my speedo off? Any help will be greatly appreciated because I have never changed teeth size on a bike. Thx in advance.
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Offline nemsis

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Re: 15t sprocket
« Reply #1 on: December 03, 2005, 01:10:16 AM »
yes it's too much, it puts alot of stress on the chain go 16/42 instead
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Ahab

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Re: 15t sprocket
« Reply #2 on: December 03, 2005, 01:20:31 AM »
I've seen it done, and the guys loved the torque....but it does fuck with things. 3-4 up on the rear would yield similar results without the cons to the front change
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Ahab

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Re: 15t sprocket
« Reply #3 on: December 03, 2005, 01:21:21 AM »
oh, and yer gonna want a speed healer...
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Offline Bowman

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Re: 15t sprocket
« Reply #4 on: December 03, 2005, 11:51:17 AM »
Vortex agreed to switch me to a 16 instead. Is that gonna be better on the bike as far as not hurting things? I know nothing about gearing as u can tell. I just want a little more low end. Should I change the rear to a 42 or will it be ok like it is?
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Offline denise richards

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Re: 15t sprocket
« Reply #5 on: December 03, 2005, 01:51:48 PM »
just go 16/40.big difference and speedo is not that off.15is to much
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Offline Pete

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Re: 15t sprocket
« Reply #6 on: December 04, 2005, 05:29:09 PM »
15 will also chew up your swing-arm at the front.
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Offline JROCK

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Re: 15t sprocket
« Reply #7 on: December 06, 2005, 02:15:34 PM »
Quote from: nemsis on December 03, 2005, 01:10:16 AM
yes it's too much, it puts alot of stress on the chain go 16/42 instead
+1
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Offline BiggerDanno

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Re: 15t sprocket
« Reply #8 on: December 06, 2005, 02:21:14 PM »
Don't do the 15.
Using a 16 will make your speedo off by about 15%
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Offline soon2bbusa

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Re: 15t sprocket
« Reply #9 on: December 08, 2005, 06:45:15 PM »
I went with the 15/40 soon after I got my bike.  The stock gearing was way too high for me.  I understand the argument that the 15 puts extra stress on the chain, but it is cheap and easy and I knew that in less than a yr I would be changing it all anyways.  The 15/40 made a tremendous difference in feel-went from just taking kinda sluggish from like a 10 mile per hour roll, to smoking the tire from the same punch.   Feel doesn't always equate to improved track times-mine ran the same ET and MPH after the change but was easier to launch at least.

And yes the speedo is WAY off.  You will need a cal box to fix that.
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Ahab

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Re: 15t sprocket
« Reply #10 on: December 08, 2005, 07:58:24 PM »
16/42-43 offers the same feel without stressing the chain and damaging the arm. throw a chain and tell us if it was worth it  :wink:
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Offline flfiremedic

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Re: 15t sprocket
« Reply #11 on: January 13, 2006, 11:45:43 PM »
16T made a HUGE diff in my bike.
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Offline denise richards

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Re: 15t sprocket
« Reply #12 on: January 14, 2006, 06:13:28 AM »
Quote from: flfiremedic on January 13, 2006, 11:45:43 PM
16T made a HUGE diff in my bike.
should feel like a 8%power increase 8)
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Offline customrt99

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Re: 15t sprocket
« Reply #13 on: January 14, 2006, 11:16:49 AM »
I left the stock 17 up front and went with a 42 in the rear. I'm about 135 pounds  so this should be great for me around town and on the highway.
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Offline zx12runhard

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Re: 15t sprocket
« Reply #14 on: April 22, 2006, 08:54:02 PM »
Quote from: Ahab on December 03, 2005, 01:21:21 AM
oh, and yer gonna want a speed healer...




Where can i get one?
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Offline RedBusa04

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Re: 15t sprocket
« Reply #15 on: April 22, 2006, 10:13:01 PM »
Quote from: zx12runhard on April 22, 2006, 08:54:02 PM
Where can i get one?

sometimes there's group buys here on the forum.  best bet is to check with any of the site sponsers. :wink:
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Offline BrutalBusa

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Re: 15t sprocket
« Reply #16 on: May 10, 2006, 05:17:24 PM »
I use a 15 front sprocket. No proplems so far. The bike has dry shot NO2, I inspected the chain and sprockets very close last week....everything looked fine, no obvious wear at all. I understand the arguements against a 15 front, but mine has worked good.
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Offline KevinStough

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Re: 15t sprocket
« Reply #17 on: May 30, 2006, 07:19:18 PM »
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Offline JC PAINT WORKZ

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Re: 15t sprocket
« Reply #18 on: April 19, 2007, 11:39:58 PM »
my tranny guy said stay stock in the front and go up as much as you want in the back.. speacially with high horse power.. keeps all the stress off the chain from going around such a small dia.
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Offline FBM

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Re: 15t sprocket
« Reply #19 on: April 21, 2007, 11:07:01 AM »
I've heard both ways on the smaller front... I think a 16 is what i want to go with,  I look forward to the change :D
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Offline dragosbikeworks

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Re: 15t sprocket
« Reply #20 on: May 16, 2007, 01:21:16 PM »
You will need to buy the speed o fix from Schnitz racing 1800 519 9730 They would be able to help you. Just call them they will help you and tell them what you are doing.
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Offline gunter

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Re: 15t sprocket
« Reply #21 on: January 09, 2008, 12:58:38 PM »
15T = WHEELIE BIKE
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Offline Rocketgeezer

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Re: 15t sprocket
« Reply #22 on: January 20, 2008, 01:49:30 PM »
If you guys do ANY highway riding a 15-40 combination will get old quick at 70-80  MPH the motor sounds like its doing 10 grand its not of coarse but just sounds like it is
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Offline sam1300

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Re: 15t sprocket
« Reply #23 on: January 20, 2008, 03:10:45 PM »
I did two up in back and left the front alone.  big difference but first gear is very short....almost worthless.
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Offline NCR Motorsports

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Re: 15t sprocket
« Reply #24 on: April 13, 2008, 10:58:51 PM »
Does it turn these things into wheelie machines? I do a little drag racing with it..
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