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Ships within 48 hours · Estimated delivery Jun 12 - Jun 17
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For Your Every Summer RSVP, with Code: SUMMER15
Description
BKCJ-0331 - 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Campagnolo Derailleurs (5mm bolt hole)BKCJ 0331 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Campagnolo Derailleurs (5mm bolt hole) The ultimate upgrade pulley. Guaranteed to last forever against corrosion Precision machined Delrin Derailleur pulleys featuring XD15 Ceramic Hybrid, radial bearings for enhanced shifting performance and longevity. Designed and manufactured for performance, these pulleys feature CN (tight clearance) bearings in the
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4.2 ★★★★★
Based on 1438 reviews
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Product Reviews
★★★★★ 5
Keeps your engines running right.
Color: Blue, Number of Items: 1
Works great. I've had less trouble , mosty excellent performance with my small power tools and yard equipment since I've been using this and other Stay bil products.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
★★★★★ 5
Easy Rider
Color: Blue, Number of Items: 1
Great product. Great price. Costs double at most retail stores. I use it for fuel in Bass Boat, Harley + all lawn cutting fuel for motors.
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Reviewed in the United States on February 24, 2026
★★★★★ 4
Helped to improve combustion in 12 year old Mercruiser 3.0L engine
Color: Blue, Number of Items: 1
I used the whole bottle in 1/2 tank of questionable gasoline from used boat from dealership, with no idea what mixture of gas water and particulates was in the gas tank in this 12 year old boat.
The dealer started up the boat, and it was taking a minute to get the idle going. He mentioned that the gas was a few months old, but I am guessing that is was more like 6 months old. This is the TKS engine, self priming. I think some water / condensate was in the tank. Before taking out to first trip, I added bottle and 5 gallons fresh gas. That trip to the lake, I still has some issues getting it to start easily. Ran OK, not great that day, went home, changed cap and rotor and wires. Next trip, 1 week later, the 3.0L started great, ran great, I am not sure if it took some hours to fully mix and interact with the old gas, neutralize the water, and perform it's reactions, before it made existing gas more combustible, but that is what it seemed like to me.
***UPDATE**** - I had strange fuel issues the next season after using this product. I had to replace the fuel pump and many other fuel delivery components including the carburetor. Not sure if this contributed to the fuel system failing, the long term effects outweigh the short term gains.
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Reviewed in the United States on September 25, 2024
★★★★★ 5
good buy
Color: Blue, Number of Items: 1
good buy
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Had water in my gas
Color: Blue, Number of Items: 1
Made my 150 outboard quit bogging down during acceleration
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Reviewed in the United States on April 25, 2026
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