I used to have continental tires on my cb 550 they wore great but are a little slipery in the rain the spitfires work just about as good as the D404 and wear longer (harder rubber) the D404 will need replacing between 8,000 and 12,000 miles for the rear and 16,000 to 24,000 for the front My continentals lasted twice as long but weather checked in the end so as far as tires go I would go with what everyone else recomends the spitfires are probably your biggest bang for the buck unless your road racing then if it was me i like the stick of the D404