IRC is a Jap company. The first KB125s came with the IRC tyres.
Or else you can go for Zapper Q. It's grippy on dry & wet as long as you don't leave tarmac.
Or go with Moto D/C front & back. This was the last set of tyres i had as i sold mine. Good on the road and better off it.
Select your tyres here
MRF Exports | Tyres
Also i'd recommend shifting to the chrome silencer and the older type speedo console. The present type looks iffy. This is just my opinion.