Understanding 520 coversions - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 22 (permalink) Old 05-22-2007, 11:26 AM Thread Starter
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Lightbulb Understanding 520 coversions

So I get this question in my PM. Its not the first time... and I will quote my response...

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Question?
What does a 520 conversion help?
I understand the gearing change, but why the 520 from the stock 525?
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Originally Posted by Gas Man
Those numbers are the numbers that determine the width of the chain. The higher the number the wider the chain. The wider the chain the more tensile strength the chain has, which means you can put more power thru the chain. However, most manufactures put on much higher 525 & 530 chains when a 520 will do. But you have to get a good chain... I suggest only DiD and Renthol sprockets. However, a RK chain isn't bad either other than the DiD have higer tensile strengths and looks nicer.

Ok... now the advantage.. the smaller the chain the less weight to the chain. The less weight to the chain the less rotational mass you have. Rotational mass is a multipling thing... you take the weight of the chain and times it by "pie" (3.14) that is how much it weights when you spin it around and around and around.

What does the weight do? It eats horsepower. You know how your engine may put out 150 hp but you only put down 125 at the rear wheel... those 25 lost horses are lost in the drivetrain... tranny, sprockets, chain, wheels, tires, ect... Less weight you have in your chain, and rims the less power you will loose between the motor and the pavement. Which means more power to the pavement.

Did that make sense? Were you able to follow?



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post #2 of 22 (permalink) Old 05-22-2007, 11:29 AM
 
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yep... it's all clear.

I think my stock is a 530.... it's still stock, but coming due for a new sprocket and chain.
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post #3 of 22 (permalink) Old 05-22-2007, 11:45 AM
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Perfect answer. Clears it all up.

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they make the one i posted in a strap on version
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post #4 of 22 (permalink) Old 05-22-2007, 11:49 AM
 
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Very clear, simple response.
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post #5 of 22 (permalink) Old 05-22-2007, 12:01 PM
 
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Of course these lighter parts also mean they wear out sooner.
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post #6 of 22 (permalink) Old 05-22-2007, 12:02 PM
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I don't understand, can you explain it to me in my native language of Setswana.

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post #7 of 22 (permalink) Old 05-22-2007, 01:35 PM
 
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see also chain basics.

took me a whole hour to make it, i might as well pimp it.
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post #8 of 22 (permalink) Old 05-22-2007, 02:24 PM
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I dont think running a 520 chain on a 1000 is a good idea. As for id only get about 10 races out of a did ert gold 520 on my 450f.


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post #9 of 22 (permalink) Old 05-22-2007, 02:48 PM
 
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Originally Posted by jmat2407 View Post
Of course these lighter parts also mean they wear out sooner.
kinda like a Vortex aluminum sprocket... they don't last long.
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post #10 of 22 (permalink) Old 05-22-2007, 04:15 PM Thread Starter
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That's why its important to run case hardened alum sprockets. There are even some other brands that intergrate steel and alum on the sprockets.

As far as 1000 cc bikes... I knew guys using 520 setups on RC51 bikes. That's a 1000cc and ALOT more torque than say a R1.




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post #11 of 22 (permalink) Old 05-22-2007, 04:27 PM
 
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Can it be done with the bigger bikes without any real problems? Of course. Would I recommend it? Not really. The stock chain is just fine 90% of the time.
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post #12 of 22 (permalink) Old 05-22-2007, 09:40 PM
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I dont think running a 520 chain on a 1000 is a good idea. As for id only get about 10 races out of a did ert gold 520 on my 450f.
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That's why its important to run case hardened alum sprockets. There are even some other brands that intergrate steel and alum on the sprockets.

As far as 1000 cc bikes... I knew guys using 520 setups on RC51 bikes. That's a 1000cc and ALOT more torque than say a R1.
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Can it be done with the bigger bikes without any real problems? Of course. Would I recommend it? Not really. The stock chain is just fine 90% of the time.

The only reason those bigger bikes have bigger chains is for longevity purposes... The tensile strength of a 520 chain is much higher than the forces being applied to it... That being said, it will stretch faster and therefore weaken faster on a high output machine vs. a low output machine...
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post #13 of 22 (permalink) Old 05-22-2007, 10:16 PM Thread Starter
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Yes but will that weaken state not matter due to it being fine for still a number of years and miles.




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post #14 of 22 (permalink) Old 05-23-2007, 09:40 AM
 
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yeah cuz i just got a 520 kit for mine...rk chain w/vortex sprockets.....
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post #15 of 22 (permalink) Old 05-23-2007, 05:04 PM Thread Starter
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Vortex sprockets suck!




And that was a 530 on my 9R




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post #16 of 22 (permalink) Old 05-23-2007, 05:58 PM
 
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Quote:
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Vortex sprockets suck!




And that was a 530 on my 9R
holycrap
i went to a 525 on my zx-6rr, its lasting alot longer
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post #17 of 22 (permalink) Old 05-23-2007, 06:13 PM
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gas man you seen 25 hp increase with a 520 kit?? I put several on but never saw that much change on the dyno more like 3-5, but thats what i seen. lmk if you seen different and on what make and models. i am interested
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post #18 of 22 (permalink) Old 05-23-2007, 06:59 PM
 
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Thanks Gas Man.
i have this conversion. My bike guy suggested it. He knows I ride street and track. He put all Vortex on my bike (It was free as I won a raffle at his Customer Appreciation Day)
Now I understand better.
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post #19 of 22 (permalink) Old 05-23-2007, 08:03 PM
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Quote:
Originally Posted by rickmancc View Post
gas man you seen 25 hp increase with a 520 kit?? I put several on but never saw that much change on the dyno more like 3-5, but thats what i seen. lmk if you seen different and on what make and models. i am interested
I think you misunderstood.. He stated that you lose about 25 ponies throughout the whole drivetrain.. The chain is just one part of this so lightening this part may only make you lose 20 hp throughout the whole drivetrain verses the stock 25..



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post #20 of 22 (permalink) Old 05-23-2007, 10:03 PM
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I think you misunderstood.. He stated that you lose about 25 ponies throughout the whole drivetrain.. The chain is just one part of this so lightening this part may only make you lose 20 hp throughout the whole drivetrain verses the stock 25..
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