Changing sprocket gearing & Chain life - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 26 (permalink) Old 03-31-2007, 07:08 PM Thread Starter
 
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Change in setup

I chipped a tooth on my driven sprocket. I was just gonna replace it with another stock 43 tooth sprocket, but free is better. I got a friend who donated his F4I sprocket cause it's a piece of crap: the bike not the sprocket. This is fine cause it's free, but an F4I has 46 teeth and I've always riddin a stock 43. How much difference is there in this as far as feel?
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post #2 of 26 (permalink) Old 03-31-2007, 07:15 PM
 
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it'll be noticeable. I dont recall what bike you ride though. if its not an F4i, the sprocket MIGHT not fit.
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post #3 of 26 (permalink) Old 03-31-2007, 07:20 PM
 
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as long as it'll fit you'll loose top end... gain acceleration... your bike will become front end light!

you'll want one of these
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post #4 of 26 (permalink) Old 03-31-2007, 08:58 PM Thread Starter
 
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It fits. I ride an 03 600RR, it's already mounted but my bike is still in parts: Still painting. Every once in a while I would try to see if I could roll off and accelerate hard enough to get the front end light enough to skip the front wheel, but it's only happened once or twice. This won't power up the front end if I get hard on the throttle will it?
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post #5 of 26 (permalink) Old 03-31-2007, 09:05 PM
 
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Originally Posted by ironmannFB3 View Post
It fits. I ride an 03 600RR, it's already mounted but my bike is still in parts: Still painting. Every once in a while I would try to see if I could roll off and accelerate hard enough to get the front end light enough to skip the front wheel, but it's only happened once or twice. This won't power up the front end if I get hard on the throttle will it?
if your front end already came up... your gonna have more trouble with the new sprocket. I don't think it'll be too much though...

but yeah it's gonna skip or come up with much more consistency.

just so you know I'm going up 2 teeth in the rear and down one in the front... which equals +4 or +5 in the rear depending on who you talk to... so mine I'm expecting is gonna wanna buck me off if I'm a little greedy with my wrist
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post #6 of 26 (permalink) Old 03-31-2007, 09:40 PM
 
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well, if its free, +3 in the rear is cool. you're going to need a longer chain though, since that is adding more teeth into the mix and you know how that works.
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post #7 of 26 (permalink) Old 04-01-2007, 12:04 AM Thread Starter
 
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3 teeth is about 3 inches, the diameter will increase accordingly but the chain only uses half of it so I'm gonna estimate 1.5 in reduction in slack, not really that much is it? But that brings up a good question: How do you know when it is time to change the chain with a different Sprocket diameter? The replacement scale isn't adjustable, it's just a sticker.
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post #8 of 26 (permalink) Old 04-01-2007, 11:27 PM Thread Starter
 
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Changing sprocket gearing & Chain life

When going from 43 teeth to 46. How would a guy know when to change his chain since the bigger sprocket would mess with the time for a new chain scale they put on the bike?
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post #9 of 26 (permalink) Old 04-01-2007, 11:40 PM
 
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Originally Posted by ironmannFB3 View Post
When going from 43 teeth to 46. How would a guy know when to change his chain since the bigger sprocket would mess with the time for a new chain scale they put on the bike?
When it stretches beyond adjustment and when the sprockets are worn out.



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post #10 of 26 (permalink) Old 04-01-2007, 11:44 PM Thread Starter
 
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that sounds not so safe
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post #11 of 26 (permalink) Old 04-01-2007, 11:48 PM
 
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Well ideally you would change both spockets and chain at the same time.



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post #12 of 26 (permalink) Old 04-02-2007, 12:26 AM Thread Starter
 
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chain is still relatively new. I'd say only about 1-2 cm of permanent deformation
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post #13 of 26 (permalink) Old 04-02-2007, 08:04 AM
 
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Chain life is measured buy the stretch of roller/pin interface, NOT overall chain length. To see if your chain is stretched beyond it's useful life, move to the rear sprocket centerline in line with the front (the rearmost part of the sprocket) try to pull the link away from the sprocket: if it moves more than 1/2 the distance of the sprocket tooth, your chain is beyond it's servicable life.

Last edited by oldetymebiker; 04-02-2007 at 08:41 AM.
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post #14 of 26 (permalink) Old 04-02-2007, 10:02 AM
 
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chain life is determined by 3 major things. how you ride, how well you maintain the chain, and the quality of the chain you bought in the first place.
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post #15 of 26 (permalink) Old 04-02-2007, 10:02 AM
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Exactly what OTB said... but I highly doubt your chain is going to fit anyway when going up 3 teeth without pulling the wheel as far forward as possible and most likely over tightening of the chain.




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post #16 of 26 (permalink) Old 04-02-2007, 12:57 PM Thread Starter
 
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Little projects always seem to cost just as much as the big ones. So I'm either gonna have to buy a chain breaker and some links or buy a whole new chain?
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post #17 of 26 (permalink) Old 04-02-2007, 02:22 PM
 
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when a chain has already seen some use, adding links isnt a good idea. the new links have no wear, while the chain has some or a lot of wear and mixing the two usually doesnt end well. new chain is a wiser idea.
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post #18 of 26 (permalink) Old 04-02-2007, 03:09 PM Thread Starter
 
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Thanks yall, i'll see if the old one will work, and if not get a new one.
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post #19 of 26 (permalink) Old 04-02-2007, 03:16 PM
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I merged you're two thread sense they are circling around the same subject.

I don't think you'll get the sprocket on without over-tightening your chain. I have seen +2 hard to get on.

Further, how old is the used sprocket?

I think you'd be better off getting -1 in the front for like $25. It will be steel vs alum. Then when you feel like changing it up again or feel the need to get a "new new" setup you can buy a whoe new front/rear sprockets and x-ring chain.






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post #20 of 26 (permalink) Old 04-11-2007, 01:56 PM
 
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yeah i am with Gas.. a new front sprocket is the most affordable way to make your current set up last....

ALSO, chain wear is suppossed to be measured by measuring links... you will wanna look it up, maybe on the RK or DID site.. they will give you a certain number of links to measure... if they are over a certain length, the chain is stretched past the safe riding amount and they recommend a change. Dont over ride it, breaking a chian in BFE is a bad thing, sucks to have to try and locate a friend with a truck to come get ya cuz your stuck with no chain...and worst case... it breaks mid corner and causes a CRASH
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