Qualifying Sprocket

Adi RocK · Joined: 07 Feb 2009 Posts: 64 Location: Brunei,

Hi, has anyone tested this?

"With the sprocket working with half the number of teeth than a traditional sprocket, and half the weight, it produces less drag which then equates to more horsepower.

The gain in terms of RPM is in the vicinity of 200-300rpm."
Available from RK Karts Australia:

www.rkkarts.com.au

Marketing or real?

Ted Hamilton · Posted: Wed Dec 05, 2012 9:13 am Post subject:

The dirt oval guys use these all the time. I consider it a good way to lose your chain and strip teeth off at the most inopportune time. If you're resorting to this to lose weight before mag wheels, lightweight hubs, and carbon fiber seat, I think it's a waste and not worth the risk.
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Dean Graves · Posted: Wed Dec 05, 2012 9:47 am Post subject:

Works ok with #35 chain. Wouldn't use it with a #219 chain.

Jim McMahon · Posted: Wed Dec 05, 2012 11:03 am Post subject:

The RPM gained claim is of course pure absolute BS.
However, on short a oval track that's 14s or less and karts are within hundredths of each other, maybe?
Can't help but think for a qualifying sprocket though you could have even less metal on there.
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Walt Gifford · Posted: Wed Dec 05, 2012 11:32 am Post subject:

We need more kart parts that last 5 minutes.

patrick slattery · Posted: Fri Dec 07, 2012 1:10 pm Post subject:

I used to make my own with the plastic gears. It worked but didn't see any additional performance gain.

David Goldman · Joined: 25 Feb 2013 Posts: 5

Seems very farfetched to me. Unless that changes the gear ratio (which it shouldnt for the same "number of teeth") it couldn't possible gain rpm. Sure, there will be less friction; when there are no teeth left on the thing. I would stay away. If you really want to have less friction and less weight try one of these. I've never had a problem with them, but I don't think they make you any faster. To each there own in their mindset though. If it works in your head that might be enough to help your confidence on track.
http://www.cometkartsales.com/store/sprocket/extron.htm

Pete Muller · Posted: Sat Mar 02, 2013 9:19 am Post subject:

If a standard sprocket sapped that many rpm compared to this "light weight" one, it should be glowing red-hot within a lap or two.

Absurd claim.

Michael Boone · Posted: Sat Mar 02, 2013 12:10 pm Post subject:

Try hopping in your seat heard that works also! Rolling Eyes

MB

KURT RODGERS · Posted: Sat Mar 02, 2013 2:54 pm Post subject:

too tents!

every trick of the week is worth two tenths
always
always
always
maybe if I ran a v belt it would be faster yet - no teeths!