Am I stock?

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Am I stock?

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Am I stock? - 9/9/2008 8:37:43 PM

SHugo

Posts: 119
Joined: 3/11/2008
Status: offline

I was researching chains and sprockets this morning, and on several posts I read that people were running 70mph @ 7k rpm with the stock 15/43 gear set.

My question is; is this true? and if so, I noted today that I''m running 70mph @ 5900 rpm. What kind of sprockets am I running then?

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RE: Am I stock? - 9/9/2008 8:54:54 PM

boblasek

Posts: 52
Joined: 8/18/2008
Status: offline

I would imagine you have a larger sprocket up front to bring the rpms down? But then again im still new to this stuff.

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RE: Am I stock? - 9/9/2008 10:44:08 PM

soccer13pro2007

Posts: 778
Joined: 8/16/2008
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Hmmm, never look at it then, I know Im at 55 at 4100 rpm
I also know I''m stock, I''ll check tomorrow and post asap (if it''s not raining, it''s looking like it)

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RE: Am I stock? - 9/10/2008 2:35:57 AM

SHugo

Posts: 119
Joined: 3/11/2008
Status: offline

quote:

ORIGINAL: soccer13pro2007

Hmmm, never look at it then, I know Im at 55 at 4100 rpm
I also know I''''m stock, I''''ll check tomorrow and post asap (if it''''s not raining, it''''s looking like it)

Sounds close to what I have. Throughout sixth gear (until about 80 or so) my RPM is about 1k off from matching my speedo

50mph = 4000rpm+/-
60mph = 5000rpm+/-
70mph = 6000rpm+/-

Faster I go the gap gets a little larger I believe.

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RE: Am I stock? - 9/11/2008 3:32:47 PM

soccer13pro2007

Posts: 778
Joined: 8/16/2008
Status: offline

I guess there''s a margin of engine rotations difference, I just checked and mine is around 5200 going 70. Are you sure you''re in 6th gear?

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1998 CBR 600 F3 Smokin Joes, D&D exhaust

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RE: Am I stock? - 9/11/2008 5:28:13 PM

Munson

Posts: 497
Joined: 3/22/2006
From: Brooklyn
Status: offline

First of all, your speedo can be off by up to 10%. I have the stock 15/43, and I know my odometer is 4% high, from comparing it to the mile markers on the side of the highway, so I assume my speedo is high by the same amount.

In 6th gear I am a bit over 50 mph indicated at 4,000 RPM, 65 mph indicated at 5,000 RPM, and a little over 75 indicated at 6,000.

(in reply to soccer13pro2007)

Post #: 6