73 main jet size

[73CBnoob]

Hey guys does anyone know what size main jets should be on a 73 Honda CB450. It currently has #133 but iv read that a few years they made them with 130's and then they stated making them with 145's.

Thanks


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[crazypj]

There would have been other changes as well as carb jets.
Honda didn't do just one thing at a time.
They may well have had slightly different grind on points cam, rocker arm radius, camshaft timing one or two degrees different etc
Could also be something as simple as a slightly thicker head or base gasket, 73 was n EPA regulations year so it could just be an emissions thing?
I wouldn't worry what’s in there just do a plug chop and change things if you need to