wich birel model i have?

[charlie]

I have a birel with a rotax, how can i know wich model i have?

[Garry Lobaugh]

The left bearing hanger where the brake attaches is the place to look.. If it is an 03or o-04 model the model number will be at the rear of the bearinghanger. Otherwise look on the side closest to the rear wheel and there will be a series of numbers ( your serial number) and the one with letters and numbers is the model number.. Such as R31 SR or R31 SP or Q31Z or Q31x. thanks garry