Spark plug diagram
Hot Rod Bikes Magazine
2005
"This was done in Adobe Illustrator for Hot Rod Bikes, to diagram the difference between Hot Type and Cold Type spark plugs. Essentially this was nothing more than a digital rendering of an unscannable hand-drawn sample supplied by the author, so I won't take any credit beyond the technical aspect of the rendering."—Jon Fraze









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© 2005, Jon Fraze. All images copyright by Jon Fraze or original publications