I would think they had parts at Honda.
What piston are you looking for? Dillon says the .25 oversize is no longer avail.
If you are trying to stay with Honda to keep the problem of ID ing the correct
part number, have you tried Ohio Cycle or Western Hills Honda??
Bill
Portland OR
--- On Sat, 6/18/11, Jill <jillvee@yahoo.com> wrote:
From: Jill <jillvee@yahoo.com>
Subject: [Honda-C70] Re: piston hiting on valve's
To: Honda-C70@yahoogroups.com
Date: Saturday, June 18, 2011, 9:29 AM
Wow, it's really hard to find engine parts for an '83. I kind find the right piston anywhere other than honda dealers
--- In Honda-C70@yahoogroups.com, william belleau <wjbelleau@...> wrote:
>
> I am afraid you have the wrong parts for your engine.
> I thought www.Dratv.com had a note section talking about the different
> engines. The part about 12V vs 6V has to do with the design of the engines
> used in the C70. Some have a short conecting rod and some have a longer rod.
> The cylinder, head and piston all have to match your engine. A dome piston
> into an engine that originally had a flat piston means the piston is hitting the
> cylinder head.
> Sounds like you need to start over. Sorry
> Bill
> Portland OR
>
> --- On Mon, 6/6/11, Jill <jillvee@...> wrote:
>
>
> From: Jill <jillvee@...>
> Subject: [Honda-C70] Re: piston hiting on valve's
> To: Honda-C70@yahoogroups.com
> Date: Monday, June 6, 2011, 12:50 PM
>
>
> Â
>
>
>
> Well, I compared both pistons and the first one is really flat while my new one is domed.
>
> --- In Honda-C70@yahoogroups.com, myron andrews <mvandrews13@> wrote:
> >
> >
> > Mike : Correct me if I am wrong but could Jill determine if the piston is hitting a valve or the head by checking tappet clearance on both valves? The valves should be closed with the piston up & tappets would be open. That might indicate if the cam chain is on the wrong tooth of the crank shaft or if the piston [if it is not the original ] is too tall & hits the head. Baby Huey
> >
> >
> >
> > To: Honda-C70@yahoogroups.com
> > From: mgladu@
> > Date: Mon, 6 Jun 2011 12:33:29 -0500
> > Subject: Re: [Honda-C70] piston hiting on valve's
> >
> >
> >
> >
> >
> >
> > At 5:16 PM +0000 6/6/11, Jill wrote:
> > >I got my timing all set up and stuff after swapping cylinders, but
> > >now the piston is hitting on the valve's. I can't even get close to
> > >being able to turn it all the way over. I swear i have all the
> > >gaskets and stuff. Any ideas on what to do next?
> >
> > You must have either the crank or the cam in the wrong place when
> > setting the cam chain on the cam sprocket.
> >
> > TDC happens twice, once is 'false' (180 degrees off), the other is
> > 'true' (zero or 360 degrees).
> >
> > I'm guessing you used the wrong mark on the flywheel ("T" mark is
> > correct) or indexed it to the wrong place on the case.
> >
> > http://autos.groups.yahoo.com/group/Honda-C70/files/C70%2080-81%20Passport%20Shop%20Manual%20%28JPEG%29/185.jpg
> >
> > It could also be that the wrong place on the head was used for the
> > cam sprocket (something other than 9 o'clock), but that's less likely.
> >
> > http://autos.groups.yahoo.com/group/Honda-C70/files/C70%2080-81%20Passport%20Shop%20Manual%20%28JPEG%29/188.jpg
> >
> > Only thing left would be if you used a 6 volt head or cylinder in the
> > rebuild. If so, the higher-domed 12 volt piston could be hitting the
> > HEAD - not the valves.
> >
> > Mike G.
> > -
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[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
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