Established in 1992, China Domanda Electric Machinery Co., Ltd. is China wheel sprocket manufacturer and wholesaler of pumps and eectric machinery. All production processes are conducted under rigid quality control measures, which have thereby earned us ISO9001 certification, in addition to European 'CE' and American 'UL' safety approvals for all series. We cooperate with a wide spectrum of customize wheel sprockets and wholesale distributors.

There is an old maxim: "Always change the sprockets whenever you replace your chain." This is good, solid advice -- heed it. That is also why we are presenting this product review as a doubleheader featuring both an RK chain and a set of Vortex sprockets. To add frosting to this review, we decided to include before and after performance figures, since worn drivetrain components can rob your bike of power. Our test bike was an 1986 Suzuki GSXR1100 with a highly modified motor. After 16,000 miles of use the old chain was stretched unevenly and had several tight spots, though it still moved freely and there were no kinks in it. The old sprockets had worn teeth that looked pointy and ugly. This is not good. Considering the power of the bike, new components were necessary, but not before we dyno'd the bike to get a baseline for our RK and Vortex test. Would we see a difference in power changing nothing but the chain and sprockets? Indeed we did?

RK's new XW-ring 530LFO chain is an "extreme high-performance" chain. Innovation in the o-ring department has brought to market three sealing ridges on each flat, wide rubber o-ring that separate the inner and outer sideplates of the chain. Picture the ramparts on a castle and this is what the three lubricant-trapping ridges look like. RK states the XW ring setup leads to 50 percent longer chain life. The theory behind using fancy o-rings with multiple lube-sealing surfaces is that the lubricant sealed inside the rollers by the manufacturer is trapped by more than one seal. Because it is harder for the lubricant trapped in the chain to escape, the chain lasts longer. The LFO chain we used was a 530 gauge rated to 10,000 lbs/ft tensile strength. It is recommended for bikes up to 1000cc. Though our chain had a simple, rivet-style master link, a clip-style master link is also available. Installation of the new RK chain was uneventful. The master link worked perfectly with the rivets flaring out 15/1000ths of an inch on the outside of the sideplate after being pressed out with the appropriate chain-rivet installing tool.

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