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how far off is my speedo with -1 sprocket

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ride4sport
3/3/2006 1:18:38 PM
can anyone tell me about how far off my speedo is with a -1 front sprocket on an 02 f4i???
chainstretcher
3/3/2006 5:59:33 PM
What is stock gearing -- I gotta know that to calculate the diff. Generally 1 tooth down in front is gonna be about 6%
Tahoe SC
3/3/2006 6:17:22 PM
yea mang...mines was like 7.5% with -1 for an F4i.
1998f3
3/3/2006 6:44:49 PM
I have the -1 rear sprocket and when my buddy was going 65 in my truck, I was riding next to him and mt speedo said 90. My shits way off. I really need a speedo healer. I also have a 180 rear tire instead of the stock 160. That prolly doesn't help much either.
Anubis
3/3/2006 6:49:53 PM
Average is gonna be 6 or 7%for your stock tyre size
ride4sport
3/3/2006 6:50:33 PM
i've got no clue on the actual gearing but it looks like around 7% will be somewhat accurate, i appreciate the help, i just wanna have a rough idea of how fast i'm going. thanks
04CBR600RR
3/3/2006 6:59:09 PM
My RR was about 10 mph off.
wood83
3/5/2006 12:54:01 PM
is this plus or minus 6 to 7 %
chainstretcher
3/5/2006 1:01:15 PM
Plus with a smaller front sprocket. So if you're showing 100mph you'd really be doing 93ish. This is only if the speedo was correct with stock gearing -- they generally read around 5% happy with stock gearing anyway but occasionally they are right on the money stock.
Tahoe SC
3/5/2006 9:26:45 PM
quote:

ORIGINAL: 04CBR600RR

My RR was about 10 mph off.


yo mang....it's all a percentage...not set...but increases with speed.
cjbettis
3/5/2006 10:30:40 PM

quote:

ORIGINAL: Tahoe SC

quote:

ORIGINAL: 04CBR600RR

My RR was about 10 mph off.


yo mang....it's all a percentage...not set...but increases with speed.


totally beat me to it....+1

here is some info for ya all about gearing and what it does: Gearing
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