Polaris Trail Boss 330 Chain & Sprocket Kit - 2003-2009 Models, 520-78 O-Ring Chain

Trail Boss 330 owners, if your chain and sprockets are showing their age, this Race-Driven kit is exactly what you need to get your ATV running smooth again! This complete kit includes everything - a 520-78 O-ring chain with master link, plus 11-tooth front and 40-tooth rear sprockets. The chain has an impressive tensile strength over 8,200 pounds, so it can handle whatever the trail throws at it. The sprockets are made from S45C steel that meets or exceeds OEM specifications, so you're getting quality that matches the original equipment. This specific kit fits 2003 through 2009 Polaris Trail Boss 330 models perfectly. The O-ring design helps keep lubrication in and dirt out, extending the life of your drive components significantly. Installation is straightforward if you're mechanically inclined, and you'll notice the difference immediately in smoother power delivery and reduced chain noise. Whether you're replacing worn components or doing preventative maintenance, this kit delivers reliable performance that'll keep your Trail Boss running strong on the trails. Just make sure this setup matches your riding style - the gearing works great for general trail riding and moderate terrain. Quality components make all the difference in ATV reliability, and this kit delivers exactly that.