thanks..I started with this 1970 frame and engine..i ground off everything that was not needed on the frame,shortened the rear loop and bent it up a bit, cut of the clevis mounts on the swingarm and made eye mounts so i would have a choice of shocks, the yokes,tank and seat are from a honda elsinore,the forks and front wheel are husky mx items,the rear wheel is from a yamaha DT 1 250 with a cush drive , footrests are aftermarket mx ,renthal alloy bars, genuine honda cr levers, billet quarter turn throtlle,. the engine has been fully rebuilt and is 1mm over bore with head ported to match the the 30mm amal carbs ,the ignition is a total loss system using two remote control car batteries to power the coils, the exhaust uses triumph bonny headers a 2 into 1 splitter and an end can from a 76 honda CR 125 with titanium cone from modern yamaha ...a standard 1970 SL 350 weighs 368 lbs wet ..mine weighs 286lbs.. ;D