Well I've never noticed the tank get any hotter than from the heat rising off the engine, which I imagine can only slightly warm the petrol and can that hurt? What about riding in the Sahara desert?? It was quite common practice during the 30's and I've actually used a 1938 BSA C10 tank. I made up oil pipes with Imperial fitting for the tank and US fitting for the oil pump. Ron

email (option): ronpier@talk21.com