It's best you read my article on the EGA. Suffice it to say here that this is one of the most important tools for the powersports mechanic. The reading shown above is correct for 1960s through early 1980s Honda carbureted motorcycles, though some are better slightly below 3 percent.

Note: The tools depicted on this page are shown for informational and encouraging purposes. They are not for sale. Sorry. I can however advise you on sourcing.

Part 21