To: Honda-C70@yahoogroups.com
From: rdwnj@yahoo.com
Date: Wed, 28 Sep 2011 01:56:07 +0000
Subject: [Honda-C70] Re: C70 Passport cam chain tentioner adjustment
Hello H.M.
What year C70 are you talking about? See the free Honda service manuals in the files section for all the different models.
I doubt it is the cam chain being loose, but it might help if you can adjust it?
What I would do is change the spark plug gap from 0.0025" to 0.025" instead!? :)
Did you adjust the valves with the engine cold?
How is the gas gap 'inhaling' capability? Air cleaner condition? Choke condition? Air leaks in the intake port areas. All radial and axial holes of both jets really clear? Air passage tunnels to the jets all clear? Float overflow passage clear? Points clean, gap proper? Timing correct? Mechanical advancer working properly? Just the usual stuff.
Ron in NJ
--- In Honda-C70@yahoogroups.com, "H. M. Doud" <hdoud@...> wrote:
>
> I'm getting engine surging when cruising 30 to 40 MPH. I wonder if it could
> be cam tentioner out of adjustment?
>
> I have checked the timing.adjusted the points.overhauled the carb.fiddled
> with the float level, now set at very slightly above level when checking the
> float level, bowl off, with carb upside down.adjusted the pilot screw + and
> - from 2 turns from seat.new spark plug set at .0025 thousands.adjusted the
> valves to .002 thousands.changed the air in the tires..cleaned the rear view
> mirrors.etc.
>
> No improvement..wonder if my sledge hammer would help!!!!!!
>
> hmdoud
>
[Non-text portions of this message have been removed]
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C70 Passport Not Running Right?
1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw
1970-73 C70 Troubleshooting Guide:
http://tinyurl.com/6ebwtw (scroll to sec.7.1 page 101.jpg)
1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
1980-81 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec.18-1 page 170.jpg)
1982-83 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec. 20-28 page 205.jpg)
1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn6
1982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c
More resources for C70 Passports and Cubs:
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