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post #1 of 45 (permalink) Old 07-12-2013, 12:00 AM Thread Starter
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Gearing

I have a 2012 f4 1000r. I went up 2 in the back from stock 41 to 43 while changing the chain and front sprocket also (kept stock at 15) and still with 525 but new did chain. However I'm thinking in dropping the front sprocket to a 14. I have a gearing calculator that gives me all the drive train ratio info but wanted to know if anyone has dropped down to a 14. My reasoning is quick acceleration in and out of traffic. I know these bikes pick up real well in the top end but let's face it your not hitting 165mph on the average streets. Any feedback would be appreciated.




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post #2 of 45 (permalink) Old 07-12-2013, 12:09 AM Thread Starter
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I would rather ride a ten speed than a supermoto. You ask for advice and get .....


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post #3 of 45 (permalink) Old 07-12-2013, 05:57 AM
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There have been people who have done it. I would not. The tighter radius on the sprocket, seems to me, would cause unwanted wear. If you are looking for a quicker power hit in traffic, stay in a gear that keeps the revs in the "happy" range (8000-9000 rpm) and the bike will behave better, on acceleration and deceleration, for you too.

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post #4 of 45 (permalink) Old 07-12-2013, 02:58 PM
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Thumbs up 15x43?

Quote:
Originally Posted by dagmvagusta View Post
I would rather ride a ten speed than a supermoto. You ask for advice and get .....
Quote:
Originally Posted by quad-turbo View Post
......advice
and more advice....

don't go to 14.....look in Machinery's Handbook....you never run an even number of teeth on the driving cog

Chuck;
in LA's average freeway traffic (~83mph) my Brutale (15x43) is turning a tad over 6,000rpm, a little throttle....what traffic?? i'm seeing triple digits

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post #5 of 45 (permalink) Old 07-12-2013, 04:21 PM Thread Starter
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What book are you referring to please share. I have has several other bikes Gsxr 1000, r1, my race bike zx6r all of which have an even number in the front sprocket stock from the factory.


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post #6 of 45 (permalink) Old 07-12-2013, 05:33 PM
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While I know a bunch of people who have done it on Ducati Monsters (which were geared way too high to meet Euro3). General consensus is to avoid the 14 front if you can find your desired ratio by swapping the rear. Listen to Noel.

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post #7 of 45 (permalink) Old 07-12-2013, 06:37 PM Thread Starter
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My ratio calculated is pretty accurate and a big rear is not what ideal I'm my opinion either. Thanks for the replies ill play with the gearing just as I do on the track to find a desired feel.

Thanks again.


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post #8 of 45 (permalink) Old 07-12-2013, 07:25 PM
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Thumbs down even # of teeth?

Quote:
Originally Posted by dagmvagusta View Post
What book are you referring to please share. I have has several other bikes Gsxr 1000, r1, my race bike zx6r all of which have an even number in the front sprocket stock from the factory.
dagmvagusta;
i already told you;
Machinery's Handbook
http://en.wikipedia.org/wiki/Machinery's_Handbook

the machinist's and engineers Bible

the current edition #29 has 2704 pages

http://www.mscdirect.com/product/658...S&026=nv&025=c

dagmvagusta;
look at your chain, links are in pairs right? using a sprocket with an odd number of teeth evens the wear, therefore extends the life of the chain AND sprockets

the reason you see even numbers of teeth on driving sprockets?

manufacturers don't spend money on real, experienced engineers, they get kids right out of college that can't work a pencil sharpener. because they're cheaper to hire

they spend it on advertising and umbrella girls()

hell, on my Aprilia RSVR the sprockets don't even align

but if you flip the rear sprocket so the cutout is against the carrier they do align
yes, the CS sprocket has 16 teeth too

and the thermostat is on the radiator OUTLET go figure that one out

PS;
i used to sell motorcycle chain......in 250' rolls

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post #9 of 45 (permalink) Old 07-13-2013, 03:21 AM
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Quote:
Originally Posted by theknurl View Post
dagmvagusta;
i already told you;
Machinery's Handbook
http://en.wikipedia.org/wiki/Machinery's_Handbook

the machinist's and engineers Bible

the current edition #29 has 2704 pages
I think I saw the older edition in a Thrift shop (Op shop for you Aussies), I might go back and pick this up.

Thanks for the hint.

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post #10 of 45 (permalink) Old 07-13-2013, 10:08 AM Thread Starter
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Picked up copy last night from a mechanic that seems to have every mechanic book in the world and read up on it. Good information talked about wear and damage to the chain and uneven over time. However, I change my sprockets and chain every riding season along with new tires and I don't ride the MV as much as I do my track bike and HP4 on the street so well see. Thanks for the heads up in the book.


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