Chainsaw Repair

Yes you really had 2 well modded 090's. On mine I designed and installed a billet cyl. head,5 transfer ports,7 windows in the piston,full race port timing,mx bike reed valve assembly,electronic ign. from another saw,and the huge HR carb,I was wanting to put a 34mm Mikuni on it but it ran well and I had no time with 3 other competition saws to build,044,100cc 064,and an 084 which was actually a pre-production test saw,no serial #,just #14 stamped on the crankcases,that one the Stihl rep gave me. I designed all my pipes.
I'm just glad I never injured myself running those things with so little experience. I sold all my saws to a nice American guy in 1992 who continued to run them for over 20 years on the pro circuit there, he won quite a few trophies and they never quit or blew up!
I can see you really were involved in racing.