I have been dealing with this same thing. For my bike it seems to be touchy when it comes to weather fluctuations like heat and rain. I have found that not closing the choke all the way seems to keep it from bogging or quitting, this also makes it run a little rich but its solved the problem of having to constantly tweak the air and throttle screws.
--- In Honda-C70@yahoogroups.com, "dorsetbromley" <timslaughter@...> wrote:
>
> Ok, with all your help I have gotten closer. Have adjusted idle and air screw so that all in all bike running really well. However, at times when I pull back on the throttle the bike will flatten out and bog down. I am thinking the Needle jet is too short? Also have to install the gasket next to the insulator as I was told there could be an air leak? Thoughts? Suggestions? Thank you
>
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