Inline main jet issues.

[Clams Canino]

OK...<br /><br />Strange parts listings.<br /><br />70 and 71 135 - .080 main jet<br />72 140 .080 main jet<br />73-78 150 .080 main jet<br /><br />79-81 140 Are ALL OVER THE PLACE between .074 and .080 depending on US or Aus or Can serial number, and the year and specific carb number etc etc etc.<br /><br />As far as I can *see* they should all be .080 too, and I've been telling anyone building up a "frankenmerc" to use .080 on all the 150's and 140's.<br /><br />Can someone explain why all the disparity? Typo's? I mean, some of the 115's with the little ports used .074's!<br /><br />-W