ok heres the idea im a 2 stroke lover for many reasons, lately ive been thinking more and more about what direction to go with the atc70 flat tracker, i finally decided to go with a pw80 motor to retain the machines original looks, laydown stance of the motor and air cooling. I'm going with some power reeds, custom intake, Mikuni vm20 carb, and I'm gonna try my hand at hydro forming a low pipe for it like the old dirtbikes had. I've already had some luck hydroforming with a small scale experiment. It will have a generous port job and headwork by flotek nothing to radical right away. Maybe later I'll get more serious and go to race gas. i have the pw80 motor templates made, ill be using the original holes for the top motor mounts so ill just line up the templates with the holes bolt them down and angle them where id like the motor to sit . at that point ill scribe them out on the frame and remove the necessary material and drill the other 2 new mount holes. heres some pics.
heres the bike with the old motor i built for it
http://i416.photobucket.com/albums/p...p/100_1713.jpg
old 75cc built 4 stroke im giving to my dad for his ct70
http://i416.photobucket.com/albums/p...psaadfd478.jpg
new motor
http://i416.photobucket.com/albums/p...ps730803a6.jpg
hollow frame
http://i416.photobucket.com/albums/p...ps71eea4e0.jpg
rough draft templates
http://i416.photobucket.com/albums/p...ps9bdf1ce8.jpg
final templates
http://i416.photobucket.com/albums/p...ps62f228cd.jpg
http://i416.photobucket.com/albums/p...ps04591029.jpg
in the making
http://i416.photobucket.com/albums/p...ps599e13ae.jpg
http://i416.photobucket.com/albums/p...psecfac54f.jpg