I just finished a sideport 250 (262 cc venolia 75.5 mm piston)in a 72/73 maico frame and rode it at the nats. a good thing, mine still has some bugs to work out, but handles very nicely. low ground clearance the biggest issue, which im working on now..Its around 105kg on the bathroom scale method
I will post a pic. or two
Aside from from the c&J & other exotica like the KSi what is a good donor frame for a centreport xl in pre 78??
For pre 78 is a husky frame a good recipient ? (light and good steel that can take modification?)