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Old 09-23-2009, 09:24 PM   #1
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Newb chain question

Sorry if i reposted and I know this is the biggest newb question but what's the diference between a 520 and a 525. I have never known the defference and I've been riding for 2 years???
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Old 09-23-2009, 09:33 PM   #2
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http://lmgtfy.com/?q=whats+the+diffe...+and+525+chain

there you go

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Old 09-23-2009, 09:42 PM   #3
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Well done lol...tooche
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Old 09-23-2009, 10:29 PM   #4
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Size of the chain, 525 bigger and stronger.

Only do this if your really fast and looking to gain a 10th on your time.
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Old 09-23-2009, 11:05 PM   #5
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There is a sticky in the How To and Maintenance forum by Gary (DudeWheresMyBike). The 520 is lighter and more narrow and has a different pitch on the chain links. PM Patrick for his opinion on the difference.
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Old 09-23-2009, 11:10 PM   #6
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I thought they had the same pitch but different width? I've seen people use 520 sprockets with 525 chains. If I remember correctly the 5 refers to the distance between links (effectively pitch) and the 25 or 20 refers to the width of the links themselves. Course I'm getting old and my current bike doesn't even have a chain so I could totally be mistaken
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Old 09-23-2009, 11:56 PM   #7
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Oh well idk cuz I went to moto unlimited last week to get a 525 chain and sprocket kit and patrick recomended me to get a rk kit going a tooth down in the front and ordered it for me and I got a 520 kit I guess going a tooth down mean 520??
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Old 09-24-2009, 12:41 AM   #8
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A tooth down does not change the chain size. The chain size is dictated by width and pitch.
If I recall we discussed the 520 vs 525 cost and you chose the 520 kit. If you've changed your
mind and want a 525 kit bring the the kit back as long as it's not installed and we can get you one.
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Last edited by Patrick; 09-24-2009 at 12:46 AM.
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Old 09-24-2009, 01:06 AM   #9
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Oh no I haven't changed my mind I just thought going a tooth down In The front had something to do with 520 but I figured it out I just never knew anything about chains.. I'm pretty good with everything else on the bike electronicly and other basic stuff. and I'm fine with what I got cuz I don't race or stunt yet so I'm not to worried about size.
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Old 09-24-2009, 01:13 AM   #10
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Just maintain it regularly. Keep in mind to take it easy the first couple of hundred miles to allow the chain to break in / make it's initial stretch evenly. After about 200 miles swing by and we'll show you how to keep it properly adjusted and lubed, no charge.
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Old 09-24-2009, 08:14 AM   #11
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Quote:
Originally Posted by SecretAgent View Post
I thought they had the same pitch but different width? I've seen people use 520 sprockets with 525 chains. If I remember correctly the 5 refers to the distance between links (effectively pitch) and the 25 or 20 refers to the width of the links themselves. Course I'm getting old and my current bike doesn't even have a chain so I could totally be mistaken
Patrick, i'm curious, can you clear this up?
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Old 09-24-2009, 08:18 AM   #12
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the 520 is lighter, more narrow, less rotating mass so you will accel quicker and it would make a cleaner cut if your fingers got caught between the chain and sprocket downside is they dont last as long as a 525
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Old 09-24-2009, 09:26 AM   #13
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It's actually not that much lighter than a 525, and all else being equal, steel sprocket etc. it's actually a negligible amount.
If you can actually feel the difference using the same gearing than I need to stop renting a dyno and use your dyno instead because it's so sensitive that it picks up maybe .1 hp.
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Old 09-24-2009, 09:43 AM   #14
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Now that is some funny chit right there!
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Old 09-24-2009, 10:09 AM   #15
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lmgtfy.com
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Old 09-24-2009, 10:27 AM   #16
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Quote:
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It's actually not that much lighter than a 525, and all else being equal, steel sprocket etc. it's actually a negligible amount.
If you can actually feel the difference using the same gearing than I need to stop renting a dyno and use your dyno instead because it's so sensitive that it picks up maybe .1 hp.
lol @ "-dyno"
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Old 09-24-2009, 10:32 AM   #17
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Old 09-24-2009, 10:04 PM   #18
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Quote:
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I thought they had the same pitch but different width? I've seen people use 520 sprockets with 525 chains. If I remember correctly the 5 refers to the distance between links (effectively pitch) and the 25 or 20 refers to the width of the links themselves. Course I'm getting old and my current bike doesn't even have a chain so I could totally be mistaken
You are correct.

Chain No., Pitch, Roller Diameter, Roller Width, Sprocket thickness

520 5/8" 0.400" 1/4" 0.227"
525 5/8" 0.400" 5/16" 0.284"
530 5/8" 0.400" 3/8" 0.343"

The first number refers to the number of eights of an inch between pins on the chain. All 500 series have a 5/8" pitch. The next 2 rumbers are the width between the links, also expressed in 1/8". The 20 in 520 means there are 2.0 1/8"s (1/4") between the side plates. A 525 chain is 1/16" (2.5 X 1/8=5/16)wider than an 520 and 1/16" narrower than a 530.
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