While some folks will ride these bikes and others with minor exhaust leaks, I muchly prefer to have them sealed up the way Honda intended. exhaust gas is hot and can be damaging to surrounding parts, including some of your parts.
--- On Tue, 6/26/12, wjbyers@rocketmail.com <wjbyers@rocketmail.com> wrote:
From: wjbyers@rocketmail.com <wjbyers@rocketmail.com>
Subject: [Honda-C70] Re: exhaust system
To: Honda-C70@yahoogroups.com
Date: Tuesday, June 26, 2012, 12:50 PM
Thanks.. It is an original exhaust assembly and head. I think the pipe is slightly out of line as it curves into the head. It is now mounted and the 6mm nuts are not too tight. I want to have a friend look at it that is a better mechanic than I am before I tighten them up. As is is now there is a little exhaust leaking toward the rear of the engine. I'd like to the the alignment better but it not easy to change it - they probably have a tool to bend the exhaust pipe. Is a very small leak ever acceptable with these engines? Thanks. JEff
--- In Honda-C70@yahoogroups.com, "rdwnj" <rdwnj@...> wrote:
>
> Hello Jeff
>
> Did you read my message #46691?
>
> The exhaust port cylindrical surface should be flat and parallel to the flared end of the exhaust pipe. The gasket sits between. Don't tighten the muffler mounts to the frame. Just hang or the muffler or half a turn on a nut. Tighten up the exhaust port end first. The fit to the frame may not be perfect but should be close. If it is 'off' too much, it may not be the correct muffler, or it may be bent, or it may be a different head on your motorcycle that isn't original?
>
> Ron in NJ
>
> --- In Honda-C70@yahoogroups.com, "wjbyers@" <wjbyers@> wrote:
> >
> > I received all the parts to install the exhaust system to the head of my 1981 Honda Passport. I would like some feedback on how the fange should look in relationship to the head. First, I imagine the fange is not flush against the head - that there is some space between the fange and the head. Second, if there is supposed to be some space will the space to equal by both studs - or will there a slightly unequal spacing between the fange and the head. I guess I am wondering if there is some adjustment that needs to be made to the exhaust pipe curve out of the head (although I doubt this). I have never seen an assembled Passport exhaust system and the bike is new to me. By the way, for those of you that have helped me order the correct parts, the stud was not broken off; rather, the previous owner must have let the 6mm nut vibrate loose and the stud must have then also vibrated out of the head. I cleaned up the threads and the new stud when in, no
problem. Thanks, Jeff
> >
>
[Non-text portions of this message have been removed]
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:
http://www.shlaes.com/Vehicles/Scooter.htm
http://www.velodrome.com/HondaC70/HondaC70.html
