81 KZ440 tires

I bought tubeless tires thinking that they were right. it turns out i had tubes in the old ones. can i still use them. i think it might have been tubeless stock

I'm not sure if an 81 440 had tubeless tires but yes, you can run tubes in a tubeless tire.

I used to have an '81 440-LTD, and it did have tubeless tires. But then the rear wheel developed a slow leak, and the local dealer recommended that I put a tube in it, so I did.