NGK C7HSA spark plug 145-20 for compatible scooter engines, showing ribbed ceramic insulator, threaded terminal and ground electrode NGK C7HSA spark plug 145-20 for compatible scooter engines, showing ribbed ceramic insulator, threaded terminal and ground electrode
NGK C7HSA spark plug 145-20 for compatible scooter engines, showing ribbed ceramic insulator, threaded terminal and ground electrode

NGK

NGK C7HSA Spark Plug (NGK4629)

SKU 145-20
$5.00
Shipping calculated at checkout.
The industry-standard ignition choice for 50cc–150cc engines. Features a high-conductivity copper core and superior ceramic insulation to ensure reliable cold starts and peak performance. Genuine NGK quality—In Stock & Ready to Ship.
Description

Keep your ride running smoothly with the NGK C7HSA standard spark plug. Its copper core and alumina silicate ceramic insulator support reliable ignition and efficient heat transfer, making it a practical tune-up choice for engines that specify this plug. The ribbed white ceramic body and exposed threaded terminal pair with a compatible spark plug cap; a terminal nut is not included.

Key Features

  • Copper-core construction: Promotes conductivity and heat dissipation for consistent ignition.
  • Alumina silicate ceramic insulator: Combines strength with effective heat transfer.
  • Triple-gasket sealing: Helps prevent combustion gas leakage.
  • Corrugated insulator ribs: Help resist flashover and ignition misfires.
  • Zinc-plated shell: Provides corrosion resistance for everyday service.

Technical Specifications

  • Brand: NGK
  • Part number: 145-20
  • Plug model: C7HSA
  • NGK stock number: 4629 / NGK4629
  • Series: Standard
  • Thread diameter: 10mm
  • Thread reach: 12.7mm (1/2 inch)
  • Hex size: 16mm (5/8 inch)
  • Gap: 0.7mm (0.028 inch); confirm the vehicle manufacturer's specification
  • NGK heat range: 7
  • Resistor: No
  • Quantity: One spark plug
  • Terminal nut: Not included

Compatibility

Make / Platform Applications
Genuine Buddy 50, RoughHouse, Black Jack, Rattler 50
Honda Ruckus, Metropolitan, Elite 50
Yamaha Vino 50 four-stroke, Zuma 50 four-stroke
Universal applications Engines requiring C7HSA specifications

 

Before ordering, confirm the specified spark plug for your model, year and engine. Match thread diameter, reach, heat range, resistor requirements and terminal connection; model name or engine displacement alone does not establish compatibility. Check the required gap before installation and follow your vehicle manufacturer's installation instructions.
Product Diagrams
Features
  • Copper core for conductivity and heat dissipation
  • Alumina silicate ceramic insulator
  • Triple-gasket combustion gas sealing
  • Corrugated ribs help resist flashover
  • Zinc-plated shell for corrosion resistance
  • Non-resistor plug; terminal nut not included
Specifications

Brand: NGK; Part number: 145-20; Model: C7HSA; NGK stock number: 4629 / NGK4629; Series: Standard; Thread diameter: 10mm; Reach: 12.7mm (1/2 inch); Hex: 16mm (5/8 inch); Gap: 0.7mm (0.028 inch), confirm vehicle specification; NGK heat range: 7; Resistor: no; Core: copper; Quantity: one plug; Terminal nut: not included
Model Fitments

Genuine Buddy 50, RoughHouse, Black Jack, Rattler 50; Honda Ruckus, Metropolitan, Elite 50; Yamaha Vino 50 four-stroke, Zuma 50 four-stroke; compatible Chinese 50cc and 150cc GY6 air-cooled engines; confirm model/year, specified plug, thread, reach, heat range, resistor requirements, terminal and gap before installation
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
Since 1989

Supplying parts and accessories for vintage and modern scooters since 1989 – Over Half a Million Served and Counting!

Comprehensive Resource

From wear-and-tear items like tires and oil filters to aftermarket parts from industry-leading brands.

Dealer Focused

With a committed team of dealer-focused sales reps and streamlined pricing and shipping processes, we are dedicated to supporting your business.

Innovative

Our team constantly strives to develop and source the best new products for your scooter.

Tech Specs

How often should I change my spark plug? > For most 50cc–150cc scooters, we recommend inspecting the plug every 1,000 miles and replacing it every 2,000–3,000 miles.

Pro Tip: If your scooter is difficult to start or idling roughly, check the plug color. A healthy plug should have a light tan or gray color. If it’s black (sooty) or white (blistered), your engine may be running too rich or too lean.

Installation Note: Always start threading the plug by hand to avoid cross-threading the cylinder head. Tighten to 1/2 turn past finger-tight for a new plug to properly crush the sealing washer.

Brand: NGK

Model: C7HSA (4629)

Thread Diameter: 10mm

Hex Size: 16mm (5/8")

Reach: 12.7mm (1/2")

Resistor: No

This plug is the standard replacement for:

  • Genuine: Buddy 50, RoughHouse, Black Jack, Rattler 50
  • Honda: Ruckus, Metropolitan, Elite 50
  • Yamaha: Vino 50 (4-stroke), Zuma 50 (4-stroke)
  • Chinese Scooters: All 50cc & 150cc GY6 Air-Cooled Engines