[jpramondon]

Since I'm in the process of changing quite about everything of the rear of my bike, I gathered a couple of facts that one might find interesting ... or not.

So here's a picture of 2 types of bones : stock ones and Lust Suspension ones.


And then a little weight comparison between a stock drive chain and 520 one.
Stock :


520 :


Oh ... I almost forgot : the read figures are centimeters and grams ;D

J

 

[DarkMatter]

no prob.

a good lot of us statesiders can do the conversions

thanks for the pics.

 

[dmmcd]

So the chain is about 1/4 pound different? Doesn't seem very significant.

Thanks for the info.

 

[andyauger]

Not all 525 and not all 520 chains weigh the same. If we take 1/4 pound as a weight difference it is truly negligible (unless you're racing seriously and are going after hundreths of a foot-pound of torque).

The dogbones pictured will raise the rear of the bike somewhere around 25mm. This will speed up turn in due to the change in rake lifting the tail makes.

 

[jpramondon]

So the chain is about 1/4 pound different? Doesn't seem very significant.

Thanks for the info.

yeah ... I must admit I've been a bit disapointed by this very small gain ... I really thought the figures would show more of a difference.
This chain is more like a 520 version of the 525 stock chain. It's an RK Quadra X-Ring but it's still made of steel, so their weight are pretty similar. (Not like this aluminium 520 chain I had on my racing 599 a couple of years ago).

J

 

[dmmcd]

yeah ... I must admit I've been a bit disapointed by this very small gain ... I really thought the figures would show more of a difference.
This chain is more like a 520 version of the 525 stock chain. It's an RK Quadra X-Ring but it's still made of steel, so their weight are pretty similar. (Not like this aluminium 520 chain I had on my racing 599 a couple of years ago).

J

You theoretically get lighter sprockets with the 520 also, but I can't imagine that amounting to anything.

Aluminum chain? Seriously? How long did that last?

 

[jpramondon]

The dogbones pictured will raise the rear of the bike somewhere around 25mm. This will speed up turn in due to the change in rake lifting the tail makes.

You've just reminded me I forgot to write half my post. It makes it half useless ... ;D
Did I tell you I was replacing quite everything in the rear of the bike ? Alright I know I did, just kidding ... I replaced the stock shock and the dog bones to make the bike a bit more aggressive on the track.
I measured the bike's height when it was stock. It read 99cm from ground to bike's rear end.
Then I changed the stock shock and replaced it with a D6F ZX10R one. From there, it read 100cm.
And finally, after changing the bones by those shown on picture, it read 101,2cm. A bit less than I imagined.

Is it usefull to anyone ? I doubt it ... ;D

J

 

[jpramondon]

You theoretically get lighter sprockets with the 520 also, but I can't imagine that amounting to anything.

You're absolutly right. The front and rear sprockets are drilled to shave maximum weight. I should have taken another picture to show you the difference between the stock 15 teeth and the drilled one. The recently received sprocket has not been installed yet, so this picture is still doable.

Aluminum chain? Seriously? How long did that last?

Yeah ! Seriously. They were made by the french manufacturer AFAM for race purposes, but were only available for small capacity categories (not more than 600). They would break with bigger bored bikes ...
Their lasting were terrible, only a few hundred kms, something like 3000km not more. They would either break or distort at the end of their life ...

J