Tom,
I am thinking of doing the same upgrade on my bike. A couple of things:
1. I have come across the following bike exhaust system http://www.bestdirtparts.com/p101/Flat-MUFFLER-EXHAUST-PIPE-system/product_info.html. It was listed as being something that people bought in conjunction with http://www.bestdirtparts.com/Engine-Motor/c25/p49/LIFAN-125CC-ENGINE-MOTOR-COMPLETE-KIT/product_info.html. I would check your exhaust measurements on the engine you have as the muffler photos indicate what the size required is. I know the one listed on this site is not listed with a 120 but perhaps the exhaust will fit your bike/engine without modifications.
2. Consider searching notes and/or posting your issue on the separate Honda Clone Yahoo group too at http://autos.groups.yahoo.com/group/honda_clone/. you may benefit from additional input from the folks who have registered there.
3. The issue you have brought up highlights the need for a shared spreadsheet/database containing "winning combinations" for upgrades to C70s which can be posted and updated on the appropriate Yahoo group. The spreadsheet should contain at least the following:
*upgrade items
*locations purchased
*purchasing cost
*additional steps/troubleshooting required to integrate into existing bike.
*other notes
I hope this helps.
Regards,
Mark
--- In Honda-C70@yahoogroups.com, "jonyoon" <jonathan.yoon@...> wrote:
>
> Brain, I was thinking of getting that exact one before. How would you rate it in terms of quality and performance? How long did it take to get to you? I opted not to purchase from Japanese sources due to the price, but I sure do like what they've got.
>
> --- In Honda-C70@yahoogroups.com, "EddieW" <eddiewire@> wrote:
> >
> > Hey BrianW, how much did shipping cost for your muffler?
> >
> >
> > --- In Honda-C70@yahoogroups.com, "BrianW" <brianweber@> wrote:
> > >
> > > This one breathes well, but it is kind of loud:
> > >
> > > http://japan.webike.net/products/2024092.html
> > >
> > > Here's the one I am currently running on my 117cc. I punched it out to
> > > improve flow a little:
> > >
> > > http://japan.webike.net/products/2024092.html
> > >
> > > Both are quality steel pipes, not too terribly expensive and will not
> > > require forfeiture of the rear stanchions.
> > >
> > > Also, you'll likely need to source some different front foot pegs to
> > > accommodate the wider Lifan engine.
> > >
> > > --- In Honda-C70@yahoogroups.com, "Tom" <wynnjunk@> wrote:
> > > >
> > > > hello everyone,
> > > >
> > > > I've seen many posts on this forum regarding suitable exhaust
> > > replacements for larger Lifan engines. I have a 120 Lifan that I want
> > > to put in, but I need to find the correct exhaust. I know that there are
> > > exhausts out there, but the problem is that they bend upwards and
> > > displace the rear passenger foot peg. This is a dealbreaker for me,
> > > because my girlfriend needs it!
> > > >
> > > > Has anyone been able to find an aftermarket exhaust which is suitable
> > > for120cc engines and that goes straight back, like the stock exhaust
> > > for the 1983 C70?
> > > >
> > > > thanks very much in advance,
> > > > Tom
> > > >
> > >
> >
>
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
