Thats a tough one, any idea of the material ?
I still have a pair of yamaha maxims in the back of the heated basement/garage since about '93 or so and the older of the 2 needed those replaced on the engine side, heat or age seemed to crack them. I was working a low paying job in those days, but could afford them through the dealer then, still recall them not being exactly cheap, but I could still afford everything I needed for the 650 maxim, darned reliable and affordable transportation in those days.
Mine were cracked but there was no issue at the time, it looked worse. Hard to figure given the rubber, you could easily ruin them, certainly know about the problem with the '80, funny how the '81 never did this, wonder if they changed materials?
A quick search on Bike Bandit, shows OEM ones for an '82 650 $22.67, air cleaner to carb, and if I recall theres another set from the carb to the engine, you;d think those would be the same but maybe not given they are on the other side.
What make, model year is it? This supplier will likely have it, they are to bikes, atvs and such as Numrich Arms/Gunparts is to guns from what I recall, very similar set up with all they cover in parts.
Well upon further investigation, I see the other set on this model are different and were cut off from view, those are $77, so a set for each side of a carb is $100.00 + OEM that is, did not check aftermarket.
Bike Bandit