sprockets and chain

[RobertWichert]

--- In DSN_KLR650%40yahoogroups.com, "notanymoore" RJTaylor@... wrote:

> In this day of $20K+ Harley look-alikes, not a bad deal. And with a few inexpensive mods you can keep up with those guys as well. > I'd say with a bone stock bike you ride circles around those guys is more like it. ;->

Circles in the dirt, yes, but Harleys can be pretty fast in a straight line on asphalt.  I race cars, not bikes.  Well, some bikes. Robert

[revmaaatin]

--- In DSN_KLR650@yahoogroups.com, "Fred Hink" wrote:

> > Those sprocket combinations should work fine for what you want to do. One problem is that the top quality sprockets (Sunstar) doesn't make the 16T or the 45T for late model KLRs. So you will have to go with a mid grade sprocket like a JT. You definitely don't want an aluminum rear sprocket. These are for lighter weight and for racing. Aluminum will last about 1/2 as long as steel sprockets. Renthal stuff is good but over priced. If you were going with top grade sprockets, I'd say you would want the DiD VM series chain. But since you are not, then I'd look at a RK XSO or DiD V series chain. These are good chains and are equal to the quality of your stock chain. > > Fred > www.arrowheadmotorsports.com >

Fred, You bring up an excellent point--one that I experienced but was perplexed by: that the JT sprocket is a mid-grade quality. My last JT gave up 25% sooner than I expected compared to OEM rear sprocket. hmmmmm. now I know why.... Along those lines of thought-- Could one do a Rockwell 'hardness' test (link follows) on a sprocket and would that number suggest that a harder sprocket would last longer? http://www.google.com/#hl=en&q=rockwell+hardness+test&revid=1407343377&sa=X&ei=hRMLTMflApT0NYSKrLUE&ved=0CFEQ1QIoAQ&fp=de776666f137f0b9 Could we take a mid-grade sprocket and make it superior through heat treating? Is a higher cost sprocket due to heat treating or is it more costly due to closer tolerance of pt to pt and valley to valley radii? In sprocket and chain theory--which one should be harder? I would think that the chain should be harder; allowing the operator to observe the sprocket failing instead of experiencing a failed chain (of which I have had both in the past two years! Once, the chain rollers started to explode before the sprocket was toast, the next time, the sprocket teeth gave up before the chain had any real indication of failure.) revmaaatin.