| Motorcycle Spark Plug Accessories NGK is the undisputed leader in Motorcycle Spark Plugs & Caps. Motorcycle Spark Plug Caps for Modern, Vintage and Classic engines supplied by NGK and HT (High Tension) lead also available for all makes and models of motorbike or scooter. Also known as spak plug resistor, the NGK plug caps are probably the best there is on the market. With the NGK spark plug symbol code, it is possible to identify specific features of an NGK spark plug cap by decoding it's part number. Please be aware that NGK make a much wider variety of spark plug caps than those available to the UK aftermarket. We list all of the plug caps currently available. If your part does not appear on this page then it is unlikely that we will be able to supply it, you may need to contact your OE manufacturer (i.e. your motorcycle main dealer) |