What size tires were recommended?
The old sizes were different than the new ones. For example, my 1980 CBX specifies a 4.25 x 18 rear. This corresponds to approximately a 120/90-18 in the new system. Most vendors have charts to help if you only know the old size recommendation. For example, the CBX uses a 4.25 X 18.
Dunlop site:
www.dunlopmotorcycle.com/infocenter_tirecharts.asp
Generic site:
www.totalmotorcycle.com/photos/tire-tyre...de/Tire-TyreTech.htm
Although the chart recommends a 110/90 in my case, I have seen good correspondence on another board indicating the 120/90 is the better choice.
One of the good vintage tires (bias instead of radial) is the Dunlop GT501. I am running one the front of my CB750. This weekend I put one on the rear of the CBX.
Metzeler also makes bis ply tires for the older bikes - the lasertec line.
Pirelli makes the MT66 line of tires that typically are available for the older bikes. I was going to go with Pirelli MT66 on my CBX, but the local Yamaha shop had a 1/2 price sale on all Dunlops. So the GT501 was my choice.
Although I realize this is not a Honda forum, I do think this site might also be useful. This guy has done an evaluation of several tires and makes his recommendations:
www.foreven.com/motorcycles/Tyres/HoCBX_80.htm
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