Hey it's been awhile and I see the site has full upgrade. Anyway I just snatched up a good D-am O-ld D-usty G-stage E-ngine Briggs & Stratton 3.5HP with good compression for $15.00 locally that was originally $20.00. The major factor on why I snatched it up because it's full of trash in the carb after first look, the governor springs a little weak but functional, well worth the $15.00 and it included the clutch which apparently appears to be only 2-3 years old. Surprisingly enough it had no oil in the case bone dry but that's not why I am here. I would like to know would this particular engine fit in a pocket bike frame? "That would make it not road legal." My second option is if I am intend on installing it on a bicycle rack so it can be removed to prevent theft. "Thinking of installing on a dahon or an old time scooter that had the rack on it." Can someone provide me options that are closest to road legality? I can actually go to a junk yard and design a turn signal system. The design has to be mad crazy looking to run for a whole year then slap $500 on the sale price as it will be foldable. "Safe enough to store "INSIDE" my RV CHAINED DOWN"