Author Topic: Maiden voyage last night, have some questions  (Read 706 times)

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Mattydiah

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Maiden voyage last night, have some questions
« on: May 14, 2008, 06:35:13 AM »
Well, as the title says, I took my 77 750K on its maiden voyage last night.  What a fun bike!  I can tell I'm really going to like it.  I do have a few questions though.  For informations sake, it has a MAC 4-1 and pods, stock pilot jetting, and 122.5 mainjet.

When driving it at night, I notice that the lights get bright, then dim, every 30 seconds or so, like its going from generator+battery to just battery every so often.  Like I said, it seems to do this every 30 seconds or so, and it doesnt seem to affect how the bike runs at all, oddly.  Would this be a regulator issue?

Secondly, its pretty stumbly in the 1/4-ish throttle range, and seems to have some hiccups further than that, although I really didnt push it last night.  I am assuming this would be pilot jet range, and into jet needle range?  I know there isnt anything I can do about the pilot on a 77, except make sure its clean, which it is.  Should I raise the needle up a notch (are there notches or shims?), or what?  I am already running 122.5 mains.

Other than that, its doing good, and, like a typical Honda, it works almost flawlessly, despite being 32 years old.

I can tell I'm really going to love this bike!!

Offline Gordon

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Re: Maiden voyage last night, have some questions
« Reply #1 on: May 14, 2008, 06:38:14 AM »
Don't start making changes until you know what's happening.  Do a plug chop at the throttle opening that you're having the problems to see what's actually going on. 

Offline mystic_1

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Re: Maiden voyage last night, have some questions
« Reply #2 on: May 14, 2008, 08:37:26 AM »
Anyone have any theories on the regulator issue?

Not until you whip out your voltmeter and give us some test data to work with  :)

What's the battery voltage when not running, idling, and at 3000 RPM?  Describe your electrical system and ignition, if not stock.

Congrats on the first of your shakedown runs :)

mystic_1
"A ship in harbor is safe, but that is not what ships are built for."
- John Augustus Shedd

My build thread:  http://forums.sohc4.net/index.php?topic=68952.0

Offline bryanj

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Re: Maiden voyage last night, have some questions
« Reply #3 on: May 14, 2008, 09:12:49 AM »
regulator contacts need cleaning and re-setting as per Honda manual
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!