Author Topic: Honda GX390  (Read 15752 times)

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Offline Tom Price

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Honda GX390
« on: March 19, 2011, 08:21:09 am »
Got a question... working on a GX390 and tore it apart last night.  What is the spring loaded mechanism on the cam?  I am pulling the governor and low oil sensor, putting in a billet rod and a few other parts so does that need to be on the cam?  Looks like it is held on by a few press pins...  :confused:
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Offline Squidd

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Re: Honda GX390
« Reply #1 on: March 19, 2011, 08:41:16 am »
Compression release...
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Offline Tom Price

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Re: Honda GX390
« Reply #2 on: March 19, 2011, 09:05:54 am »
I thought that's what it was because I had read it somewhere on here... just couldnt find where I read it.  Get rid of it?
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Offline Squidd

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Re: Honda GX390
« Reply #3 on: March 19, 2011, 09:12:31 am »
For a full blown racing motor yes..
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Offline amr5080

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Re: Honda GX390
« Reply #4 on: March 19, 2011, 04:24:39 pm »
I have a full blown race motor and mine is still intact. Haven't had any problems, and can still use the stock starter.
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Offline George Herrin

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Re: Honda GX390
« Reply #5 on: March 19, 2011, 09:58:39 pm »
They don't sling apart like a Briggs will
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Offline Squidd

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Re: Honda GX390
« Reply #6 on: March 19, 2011, 10:38:21 pm »
That's what I was thinking, we always pulled them on the briggs
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Offline Tom Price

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Re: Honda GX390
« Reply #7 on: March 21, 2011, 09:03:45 am »
Ok, yea it will be a full blown racing motor next year.... this year just pull-start billet flywheel and rod.  doing cam next year.  It looks like it is a pretty "sturdy" setup on the cam, pins look good and heavy on everything
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Offline THawley08

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Re: Re: Honda GX390
« Reply #8 on: March 28, 2011, 05:11:27 pm »
Why would you want pull start???

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Offline Jeremy_Conley

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Re: Honda GX390
« Reply #9 on: March 29, 2011, 01:29:20 am »
I used pull start all last year and never had any issues as long as I pulled on the compression stroke. Besides, you have less weight without the starter and battery. Also I don't think anyone makes a billet flywheel with a ring gear right now.
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Offline THawley08

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Re: Honda GX390
« Reply #10 on: March 29, 2011, 01:39:40 am »
for a 390???? Arc Does
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Offline Jeremy_Conley

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Re: Honda GX390
« Reply #11 on: March 29, 2011, 02:51:21 am »
Maybe they do. I never seen it on there website, but I never looked real hard either. Tim from EES told me couple weeks ago that he is not a big fan of them. Says they aren't heavy enough and start causing other parts to break. I don't run one yet so I really can't prove this. Has anyone else had this issue?
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Offline amr5080

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Re: Honda GX390
« Reply #12 on: March 29, 2011, 06:15:16 am »
Just put one on... guess we'll find out. Raceseng is working on some flywheels for the 390
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Offline cubcadet70

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Re: Honda GX390
« Reply #13 on: March 29, 2011, 05:54:45 pm »
Yes raceeng is working on some flywheel! I've seen it on the karting forms and they won't have starting ring gear!!!  :( but they are really super light!!!!

Offline Jeremy_Conley

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Re: Honda GX390
« Reply #14 on: March 30, 2011, 02:28:20 am »
Lighter is not always better. You need some weight to balance everything out. If not you will have vibration and that causes havoc on everything else.
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