JINGKE 65-Tooth #35 Rear Sprocket for 97–100cc Mini Bikes and Go-Karts — Hardened Steel, 50.5mm BCD

The JINGKE 65-tooth #35 rear sprocket is a heavy-duty steel replacement designed to fit 97cc–100cc mini bikes and go-karts, restoring drivetrain function and offering durable, long-lasting service.

This rear sprocket is made for small-displacement recreational vehicles that use a #35 chain. Built from hardened steel, the 65-tooth design provides reliable engagement with the chain while the precise bolt pattern and center bore match common Coleman, Baja, Hensim and TrailMaster mini bike and go‑kart models. The package includes one sprocket and five master links so you can swap it in and get back on the trail quickly.

Will this sprocket fit my mini bike or go‑kart?

Measure the bolt circle and center bore to confirm fitment: this JINGKE sprocket has a 50.5 mm bolt circle diameter and a 37 mm center hole. It is intended for machines that accept a #35 chain and use a six-bolt mounting pattern with 6.5 mm holes.

• Compatible engines: 97cc, 98cc, 100cc (2.5–2.8 hp) models
• Known vehicle matches: Coleman CT100U, CC100X, CK100, SK100; Baja Doodle Bug, Blitz, Dirt Bug, Racer DB30
• Also fits: TrailMaster MB Storm and many similar mini bikes/go‑karts
• Key measurements: 65 teeth, 50.5 mm bolt circle, 37 mm center bore

How durable is the JINGKE 65-tooth sprocket?

This sprocket is manufactured from high-quality steel and heat-treated to resist wear under normal recreational use. Proper chain tension and routine lubrication will extend life, but the sprocket’s robust construction gives it better longevity than many stamped or thin alloy replacements.

• Material: hardened steel for improved tooth retention
• Finish: corrosion-resistant surface treatment for outdoor use
• Included hardware: five master links to ensure secure chain connection
• Designed to withstand: routine off-road and pavement riding conditions

How will switching to a 65-tooth sprocket change performance?

Moving to a larger rear sprocket increases mechanical advantage at the wheel, producing stronger low-end acceleration at the expense of top speed. This change is useful for hill climbs, heavier riders, or when you need quicker takeoff from a stop.

• Effect: more torque to the rear wheel, improved throttle response
• Trade-off: slightly reduced maximum speed compared with smaller rear sprockets
• Best use: off-road, low-speed technical sections, or heavy-load situations
• Tip: re-check chain length after installation and adjust tension accordingly

What should I know before installing the sprocket?

Confirm bolt alignment, clean mounting surfaces, and use proper torque values for the mounting bolts. If your chain is worn or stretched, replace it at the same time — the included master links are sized for a #35 chain and make the swap faster.

• Prep: remove rust and debris from hub flange before mounting
• Fastening: use six bolts matching 6.5 mm holes and correct torque spec
• Chain: inspect for wear; replace if elongation exceeds manufacturer limits
• Safety: test ride at low speed to confirm secure installation and proper alignment

Who is this for? The JINGKE 65-tooth rear sprocket suits owners of 97–100cc mini bikes, go-karts and drift trikes who need a robust replacement part that restores drivetrain reliability or changes gearing for stronger acceleration. Hobbyists, small vehicle repair shops and weekend riders who want a solid steel sprocket with clear fitment dimensions will find this part practical and cost-effective. If you’re unsure about compatibility, measure your current sprocket’s bolt circle and center bore or compare with the listed vehicle models before ordering.