well when I stayed in Bolivia I had contact to Nosiglia Sport. It is a Honda dealer and they are really good. Ok, maybe a little more expensive than others (I do not know a lot though).
Anyway, Nosiglia is located in the zona Sur!
Nosiglia Sport Ltda.
Av. Costanera No. 29 (Calacoto)
La Paz – Bolivia
Just as a tipp: I recommend to organise a citymap in the officina de turismo near Plaza San Franzsico (a little down the raod on the side with the road up the hill).
Here in case you are looking for a good and not too expensiv Hostal, where you can place your bike safely:
Hostal Jach`a Inti
Calle Murillo 760
entre Calle Santa Cruz y Graneros
Tel: 231 6906
GPS: S16°29.326 W68°08.326
Price: 40-50Bol. / Person
in case you are looking for european food:
The KETAL-Hipermercados can support a lot of them, but expensive!:
In La Paz:
Av. Ballivián esq. Calle 15
Calacoto Central Piloto
Calle 21 esq. Montenegro
Av. Arce esq. Pinilla Sopocachi
Thats about all at the moment:
Have a nice trip and enjoy your time there. It is fantastic!!!