Chains. Please educate me

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5/14/2018 3:03 AM

Hi all and thank you for reading.
My apologies if this sounds like a dumb question but how do chains alter the performance of a bike.
I keep seeing questions about “ best chains” or read that the factory chain is crap and should be replaced.....

Can someone explain how and why a aftermarket chain is better than stock...

Cheers

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5/14/2018 4:41 AM

DID & RK chains are better than stock. Theyre stronger and last longer. Brands like primary drive arent all that great but they work if youre on a budget.

As far as performance of a bike.. a chain thats too tight will affect suspension function and cause shifting problems. Worst case it snaps and knocks a hole in your engine case.

On streetbikes, we usually go to a thinner chain and sprockets to reduce weight. For example i went from a 530 to a 525 setup. Im not sure if thats an option on a dirtbike since the chains are already so thin.

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5/14/2018 5:22 AM

Most stock chains are DID or RK? Take good care of any chain and it'll last, even on the cheaper end. Cleaning and lubing the chain during a days riding, rather than just after it, will help. As will using old engine oil rather than a sticky chain lube meant for road bikes.

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5/14/2018 5:25 AM

Mr Happy wrote:

Most stock chains are DID or RK? Take good care of any chain and it'll last, even on the cheaper end. Cleaning and lubing the chain during a days riding, rather than just after it, will help. As will using old engine oil rather than a sticky chain lube meant for road bikes.

I havent seen any high end did gold chains on a bike at the dealership. Only the cheapo ones.

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5/14/2018 5:27 AM

0 ring or x ring chains last up to 5 times longer than standard chains.

Paw Paw

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5/14/2018 5:38 AM

No idea what you lot are doing. I've replaced a chain as the end plates and pins are getting worn, rather than because it's stretched, and that was a cheap £20 DID chain.

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5/14/2018 6:51 AM

kb228 wrote:

DID & RK chains are better than stock. Theyre stronger and last longer. Brands like primary drive arent all that great but they work if youre on a budget.

As far as performance of a bike.. a chain thats too tight will affect suspension function and cause shifting problems. Worst case it snaps and knocks a hole in your engine case.

On streetbikes, we usually go to a thinner chain and sprockets to reduce weight. For example i went from a 530 to a 525 setup. Im not sure if thats an option on a dirtbike since the chains are already so thin.

The PO of my bike put on all new chain sliders and guides and sprockets from Primary Drive. They seem pretty good. The chain i am not sure what brand it is. It isnt worn out and is an o ring chain but i would like to replace it with new chain and sprockets from a better brand... but if you are on a budget i would go with them. They seem to get really good reviews on RM...

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5/14/2018 7:06 AM

kb228 wrote:

DID & RK chains are better than stock. Theyre stronger and last longer. Brands like primary drive arent all that great but they work if youre on a budget.

As far as performance of a bike.. a chain thats too tight will affect suspension function and cause shifting problems. Worst case it snaps and knocks a hole in your engine case.

On streetbikes, we usually go to a thinner chain and sprockets to reduce weight. For example i went from a 530 to a 525 setup. Im not sure if thats an option on a dirtbike since the chains are already so thin.

Alec138 wrote:

The PO of my bike put on all new chain sliders and guides and sprockets from Primary Drive. They seem pretty good. The chain i am not sure what brand it is. It isnt worn out and is an o ring chain but i would like to replace it with new chain and sprockets from a better brand... but if you are on a budget i would go with them. They seem to get really good reviews on RM...

I have primary on my kx’s. The sprockets are fine. Not as nice as a renthal tho. The chain on one bike wont keep the clip on the masterlink. Ended up buying a did gold chain for it. The gold finish wears off super fast. Longevity isnt looking promising as ive had to adjust it twice in 3 hours. the did chain has been set and forget during the same timeframe. The DID chain on my gsxr hasnt needed adjusted after 5k miles.

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5/14/2018 7:13 AM

Mr Happy wrote:

No idea what you lot are doing. I've replaced a chain as the end plates and pins are getting worn, rather than because it's stretched, and that was a cheap £20 DID chain.

A fast rider vs a slower rider makes all the difference. Quick guys who ride hard will stretch any chain.

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5/14/2018 7:33 AM

An O-ring/X-ring chain will sap power from the bike due to the added friction in the chain. Spin a rear wheel with an O-ring chain and one with a standard chain and the standard chain wheel will spin longer.
The difference can be seen on a dyno, but I've ran both and never felt a difference on the track.

O-ring/X-ring chains are also heavier, which increases rotational weight which is generally a bad thing. But again difficult to notice.

If you are super serious and chasing 10ths off lap times then definitely get a high end non O-ring chain (like the pros run). If not just get a middle of the road O-ring and it will last all year if not longer

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@russ_69

5/14/2018 10:37 AM

Mr Happy wrote:

No idea what you lot are doing. I've replaced a chain as the end plates and pins are getting worn, rather than because it's stretched, and that was a cheap £20 DID chain.

imoto34 wrote:

A fast rider vs a slower rider makes all the difference. Quick guys who ride hard will stretch any chain.

Really? Thanks for the insight. I guess everyone on here is capable of winning a GP then.

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5/14/2018 10:56 AM

Mr Happy wrote:

Really? Thanks for the insight. I guess everyone on here is capable of winning a GP then.

Mr happy, your not very happy bro. You can be hard on chains and other parts without being a professional racer. Guess that blew over your head.

If you think a slower rider and a faster rider can make the bike parts last the same, I don't know what to tell you. Can't teach common sense. whistling

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5/14/2018 1:57 PM
Edited Date/Time: 5/14/2018 1:58 PM

I have been buying either the Sunstar MXR1 or DID ERT2 for my KX450F. They are both premium non oring chains. The most I get out of them is 15 hours before they really start looking roached. Sucker is hard on chains.

I can get almost twice that time out of the same chain on my YZ250 smoker.

Both of the bikes stock chains didn’t last nearly as long as what I’m buying for them now.

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5/14/2018 3:16 PM

JBecker 72 wrote:

I have been buying either the Sunstar MXR1 or DID ERT2 for my KX450F. They are both premium non oring chains. The most I get out of them is 15 hours before they really start looking roached. Sucker is hard on chains.

I can get almost twice that time out of the same chain on my YZ250 smoker.

Both of the bikes stock chains didn’t last nearly as long as what I’m buying for them now.

ERT2 isn't rated for 450's and hasn't been for a little less than 10 years now. DID tells you 450cc+ to run the MX520. They were having issues around 08-09 with the ERT2's stretching on 450's so they came out with the 520 to fix that issue.

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

5/14/2018 3:16 PM

RussB wrote:

An O-ring/X-ring chain will sap power from the bike due to the added friction in the chain. Spin a rear wheel with an O-ring chain and one with a standard chain and the standard chain wheel will spin longer.
The difference can be seen on a dyno, but I've ran both and never felt a difference on the track.

O-ring/X-ring chains are also heavier, which increases rotational weight which is generally a bad thing. But again difficult to notice.

If you are super serious and chasing 10ths off lap times then definitely get a high end non O-ring chain (like the pros run). If not just get a middle of the road O-ring and it will last all year if not longer

This!

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

5/14/2018 3:21 PM

JBecker 72 wrote:

I have been buying either the Sunstar MXR1 or DID ERT2 for my KX450F. They are both premium non oring chains. The most I get out of them is 15 hours before they really start looking roached. Sucker is hard on chains.

I can get almost twice that time out of the same chain on my YZ250 smoker.

Both of the bikes stock chains didn’t last nearly as long as what I’m buying for them now.

mattyhamz2 wrote:

ERT2 isn't rated for 450's and hasn't been for a little less than 10 years now. DID tells you 450cc+ to run the MX520. They were having issues around 08-09 with the ERT2's stretching on 450's so they came out with the 520 to fix that issue.

Says on the website it’s rated for a 450. Might give the 520MX a go next time.

Photo

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5/14/2018 4:07 PM
Edited Date/Time: 5/14/2018 4:08 PM

JBecker 72 wrote:

I have been buying either the Sunstar MXR1 or DID ERT2 for my KX450F. They are both premium non oring chains. The most I get out of them is 15 hours before they really start looking roached. Sucker is hard on chains.

I can get almost twice that time out of the same chain on my YZ250 smoker.

Both of the bikes stock chains didn’t last nearly as long as what I’m buying for them now.

mattyhamz2 wrote:

ERT2 isn't rated for 450's and hasn't been for a little less than 10 years now. DID tells you 450cc+ to run the MX520. They were having issues around 08-09 with the ERT2's stretching on 450's so they came out with the 520 to fix that issue.

JBecker 72 wrote:

Says on the website it’s rated for a 450. Might give the 520MX a go next time.

Photo

That's interesting. When they first came out with it I worked at a shop and they told us it was no longer rated for 450's because they stretched so much with all the power they were putting out. We immediately switched to the 520MX and never had an issue.

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

5/14/2018 4:24 PM

ProTaper has released a thin oring chain.

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5/15/2018 4:32 AM

imoto34 wrote:

A fast rider vs a slower rider makes all the difference. Quick guys who ride hard will stretch any chain.

Chains don’t “stretch” (the side plates don’t get longer). They wear. A tiny bit of wear in each roller adds up and the chain is longer.

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5/15/2018 5:58 PM
Edited Date/Time: 5/15/2018 6:15 PM

The D.I.D 520VT2 Narrow X-Ring "Enduro" is one hell of a chain. Stronger and far longer lasting (7+ times the wear index of the 520ERT2) than the 520ERT2 and only a smidge heavier that the 520ERT2.

The 520VT2 is lighter than the 520MX, close to being as strong as the 520MX and will outwear the 520MX many times over.

The 520VT2 is 500cc rated.

Don't be put off that is an "Enduro" chain. It kills for all manners of riding in the dirt. It is a Black&Gold beast. Bonus is no case rub on my old CR125's.

Around $95-99 from Amazon.

http://www.didchain.com/chainSpecs.html

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5/15/2018 7:00 PM

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5/17/2018 4:52 AM

I only run Renthal R1 chains... Just found a broken rear tooth on our new FE 450, I knew I should have put Renthal stuff on it from the start like I have all our Yamahas... We have run them on everything from 85's to 450's!

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2020 YZ450F
2018 KTM 450SXF FE
2016 YZ250F 2008 CRF450R
2015 YZ250F 2008 CRF250R
2001 CR250R
2010 YZ250 2012 CRF150R
2009 YZ125 2010 KX109.5
SSR Motorsports Dealer YCF Motorcycles
TAGMX Suspension & Graphics! www.tagmxsuspension.com https://www.liquidskinzdesign.com/



5/18/2018 2:13 AM

sgrimmxdad wrote:

I only run Renthal R1 chains... Just found a broken rear tooth on our new FE 450, I knew I should have put Renthal stuff on it from the start like I have all our Yamahas... We have run them on everything from 85's to 450's!

They are actually Regina chains.

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