Copper Plus
Fits KTM, Cobra, Ski-Doo & more — 9 vehicle applications
Spark Plug
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Review shipping eligibility for this region
- Canadian Owned
Champion Spark Plug 821 Vehicle Fitment
Fits 9 vehiclesThis Copper Plus fits KTM, Cobra, Ski-Doo, Kawasaki and 1 more makes vehicles.
1974 Kawasaki KX450
1972-1975 Kawasaki H1 Mach III
1971-1975 Kawasaki F7
Champion Spark Plug 821 Specifications
- Indexed
- No
- Hex Type
- Hex
- Center Electrode Design
- Standard
- Classification
- Champion Copper Plus Small Engine
- Installed Height (Inch)
- 2.24
- Electrical Terminal Type
- Non-Removable Nut
Champion Spark Plug 821 Product Description
Champion Copper Plus Small Engine 821 Spark Plug L77JC4 for Small Engine
Key Features
- Built to ISO and SAE standards for proven performance
- Copper core center electrode allows for accurate control of heat range for longer life
- Copper Plus - Dependable Performance and Durability
- OE type replacement plug
- Resists fouling
- Superior corrosion resistance
Dependable performance. This Champion® spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
About Champion Spark Plug
Shop Champion Spark Plug Spark Plug at Autrex with vehicle fitment details, current pricing, and checkout options for the Champion Spark Plug 821. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Seller reviews
What customers say about buying from Autrex — service, shipping and support. These are reviews of the store, not of this specific part.
- July 2026
Couldn't locate the parts for 2013 Civic Si Sedan. Front struts are an Anomaly found them at Capital autoparts. Great service and great parts. Shipping by CanPar sucked however
- July 2026
Great customer service. I placed an order for wheels and tires and it was an easy transaction. Make sure you read the expected lead times for delivery however. I misread that part, but the order did arrive in the correct timeframe stated. The Hostile rims and Hercules tires look great. Thank you
- July 2026
Awesome
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Frequently Asked Questions — Champion Spark Plug 821
What vehicles does the Champion Spark Plug 821 fit?
The Champion Spark Plug 821 fits 9 vehicle applications including 1998-1999 KTM 50 Mini Adventure, 1997 Cobra KING, 1978 Ski-Doo Citation 300, 1978 Ski-Doo Olympique 300T, 1976 Ski-Doo RV 250 and 4 more. Check the full fitment list above to confirm your vehicle.
How do I confirm the Champion Spark Plug 821 fits my vehicle?
Select your year, make, model and engine in the vehicle selector on this page to see a fit or does-not-fit result for the Champion Spark Plug 821. If your vehicle has options that change the part (for example brake package or axle), the result lists the questions to check. A parts specialist can also confirm fitment at 1-866-461-2787.
What are the shipping options for the Champion Spark Plug 821?
Shipping options for the Champion Spark Plug 821 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
How much does the Champion Spark Plug 821 cost?
The Champion Spark Plug 821 is currently listed at $8.00 CAD at Autrex. Final price, shipping, taxes, and availability are confirmed during checkout. Call 1-866-461-2787 if you need help before ordering.
Is the Copper Plus a direct fit replacement?
Fit depends on the vehicle and its configuration. Select your vehicle and review the fitment result for the Copper Plus before ordering.