Brand new vintage ROUTT 800 big bore kit for all 650 Triumph unit twins. May also work with pre-unit triumph 650 twins as well if you use the proper 9 bolt cylinder head and rocker boxes? Came out of old triumph shop. Kit is complete with all parts needed as well as directions. Cylinder is properly honed and finished to size and ready to bolt on. Very hard kit to find anymore. 9 1/2-1 compression so will work with premium pump gas no problem. Some very minor relieving of the cases may be required but this is easily done with a dremel tool. You will always be able to go back to stock cylinder setup if desired as the mods do not alter the cases beyond stock for using standard 650 cylinder. I pack items very well but I strongly recommend insurance and that will be an extra expense added to shipping cost. Ask me for a quote. Kit is somewhat heavy so if you are overseas buyer contact me for a shipping quote as it can get pretty expensive to ship!