Idle low with choke, high after warmup?

Posted by Field on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Idle-low-with-choke-high-after-warmup-tp4029320.html

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...

When I first start it, choke on (always unless engine is warm), the idle will be like 1k, then it'll dip below and try to die unless I give it some throttle and hold it just about 1k. I do this for awhile, then take off. After taking off it starts to hold its own, idle around just about 1k.

Funny thing... after I zoom around for a bit the idle hits 2k. It stays at 2k the entire time riding afterwards. I don't get it. This seems high, and I think I'm going through gas faster than I want to be!

I'm going to look into buying a vacuum get to sync the carburetors, but first oil change (maybe a filter converter), and some DR8EIX spark plugs (need to get a gapping tool and socket end). Thought about having local place do the syncing but it'd probably cost me very little more to get a kit.