I had a CB750 '82 model that hated me. It was what I believe was the only model made that had a curved intake tube things. The fuel inlet holes on the block had a curved rubber tube to go to the perfectly lined up carburetors. The rubber tube things (no idea what they are called) were all dry rotted, cracked and useless. New ones are thirty bucks each, and I needed four. I went down to the autoparts place and got a radiator tube with a slightly smaller circumference than the inlet holes (not hard to find the right size or close to it) and cut them along the curves with a hack saw. They worked great and stretched to fit the carbs and formed a tight seal, then were clamped down. Radiator hose is made to handle antifreeze, so it should handle gas and air mixture. Worked awesome for me while my carbs worked. Also saved me 110 bucks. Would work on any carb connection that's a rubber tube.