(jimbob8915 @ Apr. 30 2007,20:43) Only 4k on my Busa and chain is eating up my rear 43t vortex aluminum sprocket. Going to get a sprocket/chain combo kit and was looking at the chain tensile ratings of the different brands an types. I am however at a loss for the rating on a stock chain. What is it? TIA Jim
Jimbo ,
My opinion is to not buy a chain based on it's tensile rating alone nor to place alot of stock in that rating alone . Does it come into play ? Yes , but there's more to building a chain than that . Rollers , especially the pins and even the side plates make a difference . There are lower tensile stenght chains available that to an extent make for a better all around street chain long term .
Using EK Chains as example they offer a streetable Sportman 530 race chain called the DR2 for 250hp bikes . Tensile strength is 10,500
Economy EK Busa chain in their line is the ZVX530 with 10,560 tensile strenght .
Upper tier from those guys is the ZZZ with a 11,000 tensile rating .
Of those three chains only the ZZZ with a moderate tensile rating of 11,000 " some 630's are over 15,500 " offers what they call ZST " Zero Stretch Technology "
High tensile metalurgy being prone to breaking before bending deserves another topic " steel crankshafts vs modular iron as example " but when you have two metals of vastly different rockwell hardness running on each other one is gonna give . It appears in your case the aluminum gave .
I don't use EK chains myself but if you have time cruise their website . There's alot of information there that might help decide on you next chain/sprocket purchase .
Zero Stretch Technology