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shane661

Needs a life
Posts: 11494

posted August 28, 2008 06:09 AM

Sprocket Wear/Opinions?

I posted this in my build thread, but would like to get some feedback:

I have had good luck running AFAM alloy sprockets in the past. But they seem to be harder to get locally, so I decided to try a Renthal instead. I'm not happy with the results.

Here is a comparison of a new Renthal to an AFAM with some dragstrip, LSR, and maybe a thousand street miles. The Renthal is the one in front, notice the shape of the teeth:

Here is a Renthal with 30 dragstrip runs and 150 street miles:

The hard anodizing is wearing away rapidly. Maybe they are just not good for dragracing, where the chain is kept very taut. I'm not sure that I like the pointed shape of the teeth...they look "pre worn" to me.

These Renthals are advertised as being super durable...but it sure doesn't look like it to me. Anyone have an input on this?

Shane

dubious

Needs a life
Needs more time to ride!
Posts: 8442

posted August 28, 2008 06:16 AM

I responded to your other thread.
Not only is aluminum softer than steel, especially if not hardness anodized, bu the lightweight sproket is done so by removing material.
Renthal sprokets are very thin laterally at the teeth and where the chain rides, and the lack of material can only equate to accellerated wear.
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.

Smooth_G

Expert Class
Posts: 228

posted August 28, 2008 06:20 AM

i dont believe that a bike with that much power n torque should run a alloy sprocket,,i always run steel,the extra weight is worth it,,

shane661

Needs a life
Posts: 11494

posted August 28, 2008 06:22 AM

Edited By: shane661 on 28 Aug 2008 09:03

The AFAM is heavier than the Renthal, but still way lighter than steel. I think they take the lightening too far with the Renthal. At least for high hp applications.

I have heard good things about the Vortek sprockets, from a dragracer. I'm thinking of trying one of those. Right now, my favorite compromise for weight/wear is the AFAM.

Shane

CrotchRocket

Moderator
Bracket Racing with Betsy
Posts: 8038

posted August 28, 2008 07:47 AM

I say the 2 best sprockets out there are Sprocket Specialist and Vortex

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Sticks_n_Stones

Needs a job
Posts: 3930

posted August 28, 2008 08:14 AM

My friend showed this to me. He pulled it off a customers bike who had chain jumping problems. The front sprocket was a 515. The chain was a 530, and this is a 520 sprocket I believe. For some reason they didnt work too well together...