Build a kid's long-wheelbase low racer recumbent bicycle

Step 2 Disassemble and Cut Frame

Strip your donor bike down.

If you are careful with the source bike you select, you should only have to cut the frame in three places.
*where the top-tube hits the seat tube
*where the bottom bracket and chain stays intersect
*where the seat tube and the bottom bracket intersect

If your donor bike top tube doesn't match up with the 3/4" conduit well, you will just want to remove the top tube entirely and replace it. Try to avoid this as it makes things trickier.