trappermike
ArboristSite Guru
Back in in 1986 it tried to build the hottest 090 ever built,absolutely no limits. I spent many months,lots of effort,money and sweat building it,to compete in HOT SAW-under 140cc.(According to rules in B.C. Canada then.) The hardest part was competing against the race go-kart race engines used by most logger's sports Pro's at the time. In several competitions I beat most of the go-kart engines,except Ron Hartil's Comet rotary valve kart race engine,that was hopeless.
Some specs on this 090 are:
-Billet Aluminum cyl. head,special comb. chamber,210 psi compression
-Full race porting,5 transfer ports,7 windows in lightened piston,reed valve assembly from motoX engine.
-Monstrous carb,(Mikuni),equivalent of Tillotson HR,from 440 snowmobile engine(11/2"-2" bore)
-modified and welded crank
-Lightwieght alum. flywheel and electronic ignition fro smaller model Stihl
-Race pipe designed for 12,500 toque peak
-14,500 rpm limit set before competition
It was an exciting beast to run!
I eventually sold it to a collector in the U.S.A.
I'll try to put some photos,hope they work...View attachment 189958
Some specs on this 090 are:
-Billet Aluminum cyl. head,special comb. chamber,210 psi compression
-Full race porting,5 transfer ports,7 windows in lightened piston,reed valve assembly from motoX engine.
-Monstrous carb,(Mikuni),equivalent of Tillotson HR,from 440 snowmobile engine(11/2"-2" bore)
-modified and welded crank
-Lightwieght alum. flywheel and electronic ignition fro smaller model Stihl
-Race pipe designed for 12,500 toque peak
-14,500 rpm limit set before competition
It was an exciting beast to run!
I eventually sold it to a collector in the U.S.A.
I'll try to put some photos,hope they work...View attachment 189958