Generally I fabricate complete swingarms for clients out of 4130 chromoly in either round or aerostrut tubing, however, a friend of mine needed his stock swingarm lengthened and didn't have the money for a complete new swingarm so I just lengthened his stock one. Here are few before and after pics. I don't have any of the swingarm on the quad as of yet. I just finished painting the swingarm this morning and will install it tomorrow. Thanks for looking, Mike.

This the the swingarm prior to cutting.

Here is the swingarm cut and with the extension pieces mocked into place