and the basics of how to build a good handling but still great looking chopper became more common knowledge. In this period it became possible to assemble a complete chopper using all aftermarket parts, companies like S&S Cycle built complete replacement engines based on Harley-Davidson engines, frame makers such as Paughco offered a variety of hardtail frames and many bikes were built using these new repo parts. Super long girder and springer forked bikes were less popular in this era, while the use of telescopic forks grew, and builders upgraded to larger diameter tubes in both forks and frames to gain more rigidity.