Re: Engine High Idle

Posted by seestheday on Jun 04, 2013; 2:02am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Engine-High-Idle-tp4040909p4041723.html

Damn, that sounds like a good mechanic.

Sent from my BlackBerry device

From: MarkPBG [via Honda CB750'S] Sent: Monday, June 3, 2013 8:39 PM To: seestheday Subject: Re: Engine High Idle

I had the same problem with my '74. My problem was not listed among any of the things to look for when troubleshooting though. Mechanic spotted it and showed me....the carbs had fuel in them when stored, the normal varnish build up was there, but also some moisture must've gotten in there, because some parts of the casting in the carb had corrosion (or suffered the effects of electrolysis) and there were fissures in parts of the casting from that which allowed excess fuel to get where it wasn't supposed to after warming up. A new set of carb bodies from ebay solved my problem. (which was IF you could get the idle smoothed out, it was no lower than 1500 RPM, and after warming up it wouldn't idle below 4200!)

(mechanic held a flashlight up to parts of the stripped down carb bodies, and you could see light coming from what SHOULD be solid parts of the carb body.)

So I'll add....

 There may be just one more thing to look at.  :)

---

If you reply to this email, your message will be added to the discussion below:

http://honda-cb750-s.456789.n3.nabble.com/Engine-High-Idle-tp4040909p4041717.html

To unsubscribe from Engine High Idle, click here.
NAML