What I am trying to say is, there is no way to tell you what size jet to
install in your carb if you install this brand air filter, or that brand airfilter.
You have to make a guess and try the performance. You can tell how well the
bike is running buy puting it on a dyno which will cost you some money but is
a nice way to go. Or you can run it on the road and do some simple tests
to see how the bike is doing. A wide open throttle, pull the choke "ON" a little bit,
does the bike slow down or speed up? If it speeds up you are too lean.
If it slows down you might be correct or too rich, drop a jet size and try it again.
The final test is a clean plug, a wide open run, step on the shifter to shift to a higher gear
and hold it (this releases the clutch) close the throttle and turn the engine "OFF"
When you get stopped, you take the plug out and look at the color of the insulator tip.
You want a nice tan color. white you are too lean, black to rich.
Get good at it, a few sizes of jets and a few new plugs and rejet and do it again
and you will have it dialed in in no time.
Bill
Portland OR
--- On Sun, 6/26/11, atari2600a <atari2600a@yahoo.com> wrote:
From: atari2600a <atari2600a@yahoo.com>
Subject: [Honda-C70] Re: Rejet after new air filter?
To: Honda-C70@yahoogroups.com
Date: Sunday, June 26, 2011, 8:45 PM
I...err...what?
--- In Honda-C70@yahoogroups.com, william belleau <wjbelleau@...> wrote:
>
> I do believe it is going to be more of a plug read vrs a increase of a know jet X
> if you put filter Z.
> Raise the needle one slot, install a new plug and do a run and read the plug.
> Bill
> Portland OR
>
> --- On Sat, 6/25/11, Jean Luc Picard <atari2600a@...> wrote:
>
>
> From: Jean Luc Picard <atari2600a@...>
> Subject: [Honda-C70] Rejet after new air filter?
> To: Honda-C70@yahoogroups.com
> Date: Saturday, June 25, 2011, 7:24 PM
>
>
> Â
>
>
>
> Somewhere on the googles I saw a guide showing it possible to fit in a performance air filter after gutting the CVS assembly (if I did so I'd fit on a breather filter because I'm not an asshole :P) He(she?) mentioned you had to tweak the carb in some way but the link with the instructions gave me a 404. Can someone tell me if I'll have to up the main jet or is it just a 'tune the pilot screw' thing?
>
>
>
>
>
>
>
>
> [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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