JT Sprockets JTF1381.16RB 16 Tooth Rubber Cushioned Front Countershaft Sprocket

Good improvement for my 2024 Honda NX500. The bike was geared very low, probably for off-road usefulness, but I ride it on the street and highway. The 16T gear provides a significant improvement in engine behavior. The rubber cushioning is probably a good idea, but I don’t notice any difference in vibrations or sound from the stock 15T solid steel sprocket. Installation took less than 20 minutes. Speedometer remains spot-on, tested against GPS. Significant reduction in engine RPM at highway speeds.

My 2022 Honda CB500X had to immediately shift out of first gear fo second and seemed the engine was revving way to high. This 16 tooth sprocket was a perfect fit and fix. Now I can actually use first gear as well as all six gears and running 65 mph the bikes RPMs are much lower and less vibration.

If there is an award in this aftermarket sector, JT Sprockets has my nomination for best Entry Level Cruiser modification for your dollar. Case Example here for arguably the most popular motorcycle today: The Honda Rebel 300/500 have the same front/rear sprocket ratios stock of 15:40. By swapping this front sprocket with a 16 (being the tooth count), the 47 horsepower Honda Rebel 500 can take better advantage of its torque and horsepower availability across the RPM spectrum. JT Sprocket's 16 tooth swap really smooths out the gears, and not just for top speeds. Because the Rebel 500 catches max torque early on, bottom end acceleration is not compromised and first gear is usable. Then comes the real motivation to write this: Highway cruising vibrations are dampened significantly with lower RPMs in 6th gear at ~65mph. This otherwise "round town" bobber becomes a cross country machine. I managed to make the swap in 45 minutes with a lift, torque wrench, hex key set, and general mechanics wrench set/socket set (metric). The rear axle nut takes a 24mm, larger than common on the right (throttle handle) side and hex insert key to steady from spinning on the left (clutch) side. Removing the assembly to get to the chain: grab your extended socket 8mm (cover box bolting), 10mm and 14mm with torque indicator (for sprocket), mark your shifter interface, then essentially put it back on the way you took it off. I took some pictures along the way to remember how things looked. For chain tensioning: The rear adjustments can be done with the wheel lifted, locked in 1st gear, and using a 17mm socket. You can use the OEM chain, just loosen the back tensioners, bringing the rear wheel up ahead of the green ("good") indicator. The tension read will be a bit off, but most other bikes don't have this. Plus you can check slack (1-1/4" play) with a finger. Always a good time to do your maintenance while it's up there too. This will likely prolong sprocket life too with fewer repeat interactions of the same pain points on the sprocket, i.e., a 15F/40R vs 16F/40R factored over time is a significant reduction in the divisor. My only surprise is the absence of YouTube content for anyone performing this swap on a Honda Rebel before! They've done this on just about every bike, and older model 250s, but not the CMX500 (Rebel 500). This makes a real "cruiser" out of the bike and is that final piece of the puzzle I'm sure fellow owners are looking for. May I suggest this brand make note of compatibility with the HOT Rebel 500 to boost its market? Highly recommended!!!

Great quality and work well. Thanks

This front sprocket fit my 2023 CB500F perfectly, although there is a chain guide/guard millimetres in front of the chain and sprocket which I felt needed some grinding to stay at a safe distance; the extra tooth makes the sprocket bigger than the original 15tooth. I cannot speak to mileage/longevity, but it fits and it makes the bike feel much more mature with longer gears; easily the best upgrade you can do to any of the Honda 500 models.

Perfect for my CB500XA to smooth out the ratios and reduce freeway RPMs. Installed in 30 minutes.

Installed this sprocket on a 2025 Honda NX500. It’s the gearing that Honda should have supplied. And the JT sprocket fits the countershaft splines perfectly with no lateral slack.

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