Re: Idle low with choke, high after warmup?

Posted by Lucky 1 on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Idle-low-with-choke-high-after-warmup-tp4029320p4029652.html

You cannot just ignore this kind of stuff.
QUOTE:
"Hello! I just got myself an 81 750k. It has some after-market exhaust mufflers, maybe some carb stuff? I dunno. It runs strong, very fast, with only 27k miles. Problem though... ?"

What kind of "carb stuff" ?

If it does not have the original air box and filters AND you have an aftermarket exhaust the
carbs need re-jetting. It has a high idle because it is LEAN.

No need to start turning ALL the screws to correct the problem except for the mixture screws.
If you open a mixture screw 1 turn then you have to make all of them ONE TURN OPEN.

A carb sync just gets all of the slides to be the same height with in about .007 thousandths.
That is not needed yet. Because if that was off it would probably not idle at all.

You just have a high idle from a mixture that is too lean. And that is because of the intake and exhaust.

So tell us..Have the stock carb intakes been modified from stock?