What size belt for EZM?

Just spent some time doing gymnastics replacing the belt on the EZM. A long while back I thought I remembered someone saying an AX-25 belt was a good replacement. Just put one on and it looks maybe one size to big to me. Would I be ahead to just get the an adjustable pulley for the front of the system and go from there? Thanks for any help.
Dan

Thanks for the reply. My EZM is on a Huasheng 49cc and the front pulley is a 2" pulley, therein lies the problem. I see now why the AX25 looks to be big. I guess I'll consider a new pulley or get another belt. I think I might just go to a 2.5" pulley and see what happens. Thanks again for your time.
Dan

Mr jowens, Since I'm using a much smaller engine (49cc) what do you think would be ther result of going to a 2.5" front pulley?
Thanks, Dan

Mr jowens,
Just thought I'd update you on what I learned. Got ans AX24 and it was too tight for the 2" front pulley. Got a 1 3/4", still too tight. I have an idea a 1 1/2 might work but our wonderful old time hardware stor a block away didn't have that. I ended up elongating the mounting holes for the EZM. Seem s to work even though it's still a little tighter than I want. Hopefully it'll stretch a little before doing any damage to the drive shaft bearing. Of course moving the kit meant my drive chain was too tight so I had to loosen the rear wheel, remove the drive chain guard, etc. etc. Took way longer than I had planned, but I sure know how to change out the drive belt now. Thanks for your input. Always nice to have another head looking at the problem. Dan