YOXUFA Motorized Bike CDI & Magneto Coil Kit for 49cc–100cc Engines — Complete Replacement with Spark Plug & Fuel Filters

YOXUFA's motorized bike CDI ignition coil and magneto coil kit is a complete replacement set designed to restore spark, charging, and reliable starting for 2‑stroke 49cc–100cc engines.

If your motorized bicycle won’t start, stalls, or has weak spark and poor charging, this kit provides the ignition and magneto parts to return the powertrain to proper operation. The complete package includes a CDI ignition coil, magneto coil, spark plug, fuel line, fuel filters, and mounting clips so you can swap worn components quickly and get back on the road. Components are built to match OEM fit and mounting points for common small engines such as PK80, BT80 and YD100 variants.

What exactly is included and how does it match my original parts?

The YOXUFA kit is supplied as a ready-to-install assembly: one magneto coil, one CDI ignition coil, one spark plug, one fuel line, two fuel filters, and four clips. Each electrical coil is manufactured to align with standard OEM mounting dimensions and wiring layouts so it connects directly to existing harnesses and mounts.

• Magneto coil x 1 — supplies charging and timing pickup
• CDI ignition coil x 1 — generates high voltage for the spark plug
• Spark plug x 1 — pre-gapped for general fitment
• Fuel line x 1 and fuel filters x 2 — basic fuel delivery maintenance parts
• Clips x 4 — secure hoses and small components during installation

How will this kit improve starting and running performance?

Replacing an aged or damaged CDI and magneto coil often restores consistent spark timing and sufficient charging current, which helps eliminate misfires, weak start-ups, and sudden engine cut-outs. New coils also reduce electrical resistance and heat loss for steadier ignition performance at varying RPMs.

• Improves spark consistency for easier cold and hot starts
• Stabilizes charging to support lights and accessories
• Reduces misfires at idle and under load
• OEM-style fit minimizes installation adjustments

Is installation difficult and what tools will I need?

Installation is straightforward for anyone comfortable with basic small-engine maintenance. The kit is designed for direct replacement: unbolt the old coils, disconnect the plug and wiring, then mount the new parts using existing fasteners. If you follow the engine’s service manual and basic safety steps, it’s typically a 30–60 minute job.

• Required tools: screwdriver set, socket wrench, pliers, and feeler gauge for spark plug gap
• Disconnect battery (if present) before starting electrical work
• Align coil and magneto to factory timing marks when reinstalling
• Use supplied clips and filters for a tidy, leak-free assembly

Which engines and motorized bike models are compatible?

The kit is intended for 2‑stroke motorized bicycle engines commonly labeled as 49cc, 50cc, 66cc, 80cc, and 100cc, including PK80, BT80 and YD100 types. Compatibility depends on your engine’s mounting points and wiring; check dimensions and connector types against your current parts before purchasing.

• Designed for 2‑stroke small engines in the 49–100cc range
• Fits many PK80, BT80 and YD100 style engines with stock mounts
• Not universal — verify electrical connector and bolt spacing
• Manufacturer recommends checking product description for compatibility

Who is this for: This kit suits DIY mechanics, hobbyists restoring or maintaining motorized bicycles, and riders who need a practical, OEM‑style replacement for faulty ignition and magneto components. It’s ideal when the symptoms include no spark, poor charging, intermittent stalls, or when you want a compact service kit that also replaces basic fuel-line wear items.