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How do I know if I have an aftermarket sprocket on my bike?

Old 09-02-2013, 10:10 PM
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Join Date: Oct 2012
Posts: 47
Default How do I know if I have an aftermarket sprocket on my bike?

I purchased a 2007 Honda CBR600RR and it has a few mods on it that I have spotted. One of which that is an RK chain. Usually these come along with a sprocket. How do I know what type of sprocket that I have on the bike? The dealership doesn't know what mods the previous owner put on the bike. I'm just trying to figure out what mods it has.
Old 09-03-2013, 01:05 AM
CJardine's Avatar
Track junkie & modaholic
Join Date: Aug 2011
Location: USA
Posts: 1,848

Take some photos of it. Normally it has a logo or name but without photos it is hard for people to deduce what modifications may be on your bike.
Old 09-08-2013, 04:20 PM
Conrice's Avatar
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Count the teeth.
Old 09-11-2013, 07:24 PM
Bryce Swartzwelder's Avatar
Senior Member
Join Date: May 2013
Posts: 118

Measure the thickness of the chain link between the plates across a roller to determine if you have a 520 conversion or not. A 520 chain will measure 1/4 inch or .250 and a 525 will measure 5/16 or .3125 Count the teeth as previously mentioned. Use a magnet against the rear sprocket if you want to see if it is steel or aluminum. Good chance its aluminum or alloy. Origonal Stock honda front sprockets are typically wider than most and have a rubber coating on them that actually contacts the side plates of the chain that deadens driveline noise. Look in your airbox for an air filter and if its changed, check for a power commander under the seat.
Attached Thumbnails How do I know if I have an aftermarket sprocket on my bike?-chain-measurement.jpg   How do I know if I have an aftermarket sprocket on my bike?-oem-front-sprocket-coating.jpg  
Old 09-18-2013, 06:41 PM
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Join Date: Jul 2008
Location: Mesa AZ
Posts: 2,012

I don't know if I'd call the RK chain a mod just yet. Chains are wear items and need to be replaced, using a different brand then stock doesn't mean anything has been upgraded.
Old 09-18-2013, 07:25 PM
cBrentb's Avatar
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Join Date: Oct 2011
Location: Dirty South, SC
Posts: 585

Oem chains and sprockets are made by aftrr market companies. Example: on the outside of my sprocket it says AFAM, that's the oem sprocket. I can't remeber the other brand names that are commonly found on bikes. from the factory. You know like RK and D.I.D. ...point is that oem chains are made by aftermarket companies. Like stated before what makes it not stock is the number of teeth.

Ps- to tell the size of the chain look on the side of the links, it should be stamped there. If its not stamped then it could be a cheapy chain. Sometimes the cheaper chains don't come with the size stamped on the links. Hope that helps
Old 04-27-2014, 03:30 PM
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ROTM May 2014
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Location: Greece
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OEM Chain and sprocket are concluded into : DID.
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