tires question

[gregvhen]

Ive read your not sposed to mix ply and radial tires, but i found a front tire that doesnt say which one it is, and the rear tire I want is bias ply.  In the description for the front its says "4 ply rated" that means its ply right? or just ply rated? can i mix this http://www.bikebandit.com/shinko-sr740-motorcycle-tire with this http://www.bikebandit.com/kenda-k671-motorcycle-tire ?

[gsJack]

The Shinko 740/741 are bias ply tires. 

[BaltimoreGS]

I know the Kendas a bias ply, I have them on the '89.  Decent tires for the price.

-Jessie

[jeremy_nash]

you can run a radial rear with a bias front, but its a no-no to run radial front with bias rear

[gregvhen]

why is that?