Here is my list that I have compiled so far over the past few weeks.

Companies that sell conversion parts
http://www.bonzisports.com
http://www.ch-ignitions.com/
http://www.gcbmrc.com/index.htm
http://www.eellspdx.com/
http://www.paragonaero.com/
http://home.att.net/~carrprecision/index.html
http://www.wackerengines.com/index.htm
http://jagengines.com/

General Conversion & Ryobi Conversion instructions
http://home.att.net/~carrprecision/Page7.html
http://www.geocities.com/CapeCanaver...071/ryobi2.htm
http://www.geocities.com/CapeCanaver...216/index.html

General 2 stroke information
http://www.macdizzy.com/index.htm
http://www.shark-racing.com/Ingles/T...Tecnicaing.htm

Engine porting
http://www.macdizzy.com/atc.htm

Cylinder Mapping Primer
http://www.macdizzy.com/cyl_primer.htm

Homelite 25 and 30cc porting and Modifications
http://testfly.0catch.com/homelite/homelitemain.html
http://www.shark-racing.com/Ingles/T...acaoMoting.htm
http://www.club-newbery.com.ar/omelit.htm
http://testfly.0catch.com/homelite/homelitemain.html
http://www.rcuniverse.com/forum/Home...2234156/tm.htm
http://members.aol.com/meljohn999/Homelite-Hop-Up/