Was wondering if the kohler 440 is worth the hassle if fixing it need a flywheel key a new fan and shroud fixed or is it just better to go fourstroke mixin oil and stuff i have no problem with have well knowledge of twostrokes but how hard a parts to come by and are they cheap or outrages also i read the 900 has a split shifter is that true or did i not read something right whats a good idea for chain tensioners to just run rollers sprocket idlers or something diff and one more i thought all the big two stokes in these machines had elec start in them any help would b great