I´ve done 58,000mile on my Scrambler and have had no problems with the engine is great apart from corrosion gettin under the lacquer.I took the 2 casings and rocker cover off and removed the lacquer and polished them up job sorted. I´ve had no oilleaks nasty noise´s or miss fires. it use to cut out in heavy rain but found out it was water gettin into the side stand switch,so just sealed it up with resin glue where the wires go into the switch,no probs since.