Drive chains

My thoughts are I use standard heavy duty non "0" ring chains on low horsepower bikes. I feel the "0" ring chains take up too much power to turn. I run the "0" ring chains on the bigger bore bikes.

What are your thoughts?

O ring chain is obsolete It is the second generation of x ring chain now. The old standard chain gets 100 The modern chains get way more than that. Kind of like the treadwear number on passenger vehicle tires, way more now than the 100.

I'm out of touch with the newest stuff. I generally use an o-ring or x-ring chain for anything that sees a bit of mud. Fran...k, does the 2nd gen X-ring have lower drag? Better sealing?

I have used DID VM x ring many times now it is replaced with something somewhat better. I think less drag and a higher lifetime number rating. I have yet to get the new stuff. With the DIDvmxring the atv product was heavier but the tensile rating was less. Kind of have to be careful exactly which variant is being discussed.

if its important to have that extra1 hp at our age that's fine...I just use a normal o ring...just replaced one after 5 years of riding

X ring is the best way to go. So much less drag and friction.

X ring

Here is a link to Busting Motorcycle Chain Myths - Story by Greg Burns, Mechanical Engineer, Dirt Tricks Inc.

https://www.facebook.com/notes/klim/busting-motorcycle-chain-myths/416157056989/

The summary is a real eye-opener:

"Considering that the average speed around a stadium motocross track is about 30 MPH, we can say that the average horsepower loss between a sealed and unsealed chain is approximately 1/50 of one horsepower.

Considering that modern 250F motorcycles being raced generate about 42 horsepower at sea level, 1/50 of a horsepower equals one-two-thousandth or a 0.05% change."

Whatever is on special o or x ring local shop has bargain bin of old stock so will grab whatever is available, might be better off putting a 19 inch rim and lighter tyre on the small bore.

the main difference btw a sealed and unsealed chain is 5 years!