How can any document that recommends against fitting a passenger car tyre to a motorcycle be credible at all? It even suggests that underinflation is bad when everyone knows that underinflating a car tyre when fitted to a motorcycle is not only good, it's better than a properly inflated motorcycle tyre. In fact, recommending motorcycle tyres for motorcyles at all is just plain irresponsible as they're not as good as car tyres "through the twisties" and are much better for all the rear wheel braking everyone should be doing.
How can any document that recommends against fitting a passenger car tyre to a motorcycle be credible at all? It even suggests that underinflation is bad when everyone knows that underinflating a car tyre when fitted to a motorcycle is not only good, it's better than a properly inflated motorcycle tyre. In fact, recommending motorcycle tyres for motorcyles at all is just plain irresponsible as they're not as good as car tyres "through the twisties" and are much better for all the rear wheel braking everyone should be doing.