It seems the stock Regina ORP 530 chain has a tensile strength of 9390lbs. The DID superbike 520 chain is somewhere around 8500 lbs, but AFAM makes one with 10% thicker side plates, the 520OHR Hyper-Reinforced O ring chain. I can't seem to find the tensile strength of it now, but I seem to recall it's actually around 10000lbs.
He explained that the 520OHR chain actually wasn't that much lighter than the stock 530 chain at all, since it's so reinforced, I guess... seemed strange, since everyone was raving about them so much. Most of the weight is saved in the thinner sprockets.
Chain 71.4 oz 78.5 oz
Rear Sprocket 10.4 oz 35.1 oz
Front Sprocket 6.8 oz 11 oz
Total 88.6 oz 124.6 oz
All the solo,s run them for the wieght saving on the sprokets.
I had a chance to switch to 520 (from old school 630) on a GS750 vintage racer but ended up going to 530 set up because it was just so cheap for the chain($80) and sproks($9-fronts/ $16-backs). About 1/3 the $$$ compared to 520.
Go ZX9 powered
How are you installing them, Gord?gord wrote:just don't get aluminum sprockets,destroyed in 1 weekend
They should last a lot longer than one weekend if they're lined up right and nothing is sliding back and forth laterally.
It's the type of weight savings... unsprung weight hanging off the bottom of the shock. The less mass bouncing up and down the faster your suspension can work and the better your rig will be able to lay down the power.gord wrote:no cush drive on the sidecar i installed it on(the rear),no cush drive on bills,which weighs 575? plus bill and passenger,weight saving of what,maybe 2lbs? not worth it
We ran nothing but SS aluminum sprockets on the CSR and never chewed them up that bad, but I always made sure they ran true and my chain was in excellent condition... no cush on the CSR either. And as heavy as the cast rear hub and swingarm assembly on the CSR was I shaved ounces every where I could on the whole rear assembly to try and lighten the load the Penske shock had to deal with. I took -pounds- off that thing with lighter fasteners, drilling, lighter heims, tubing, axle, and it made a huge difference.
Put a steel sprocket in your hand and try to move it up and down as fast as you can. Now do the same with an aluminum one. Every bit, bob, and bolt you can lighten on the bottom of the shock will make for superior suspension performance. Suspension tuning is one area of expertise where I was schooled by the masters when I was racing solos.
These are not streetbikes meant for cross country touring, they're thoroughbred race vehicles, and should be tuned as such. Sprockets should just be considered consumable items. But if you're eating through a rear sprocket a weekend, you have a engineering issue that is causing that problem that is unrelated to the lack of a cush drive or the overall weight of the vehicle. Otherwise every LCR and Windle in the Superside FIM series would be running steel.
Actually, our sponsorship.gord wrote:actually i'm just a club racer,most up here run steel sprockets but hey,it's your money