Hartman Kit
I sold my kit start of this year to a buddy (went turbo last year).. From what I can remember he uses Yamaha clutch parts but changes almost everything. Different ramps, springs, rollers, helix the works... His kit used way less primary weight but pulled much better.. I had a buddy that tried to copy it and never could figure out the helix.. He spent lots of $$$ on custom helixes and never got it right. Finally he broke down and ordered a kit from Tom... Money well spent.. While you got your wallet out go to the Camoplast extreme track... Best two mods you can do to that sled without breaking the bank...