Are you talking about running stock P1 tires on your P5? Measure your clearance for a 27 inch tire on your P5 and if you want go experiment, I've got 1 stock front tire I'll give you, you pay shipping? It's in very good shape.
Yes talking about running stock P1 tires on P5. Found what looks like a good deal on some take offs. I get new wheels, I guess 5+2 offset. The P1 tires look like a more aggressive tire than the P5 stockers. Are they worth looking into?
Jason from appalachain mountain riders (you tube channel) used the stock 1000 tires on his 500 for a while. They worked fine Hit him up on his you tube channel.