Baja MB200 Sprocket and Brake Adjustment?

[shiftracing]

Guys,

I am trying to find a new 50 tooth spocket for my Baja MB200. I'm looking to find a new one for cheap, all of the other ones I have been finding are pretty expensive. Also, I just took down my bike to rebuild and repaint the parts because it was a little beat up from the guy who gave it to me. I was having bad braking and when I would let off of the brake lever, it would sometimes stick. Does anyone know the best settings of the brake configuration on this bike as well? Pictures work!!!

Thanks

 

[ludicrous speed]

couple of heads-up s for you about these bikes.
first,the engine plate is made out of Tin-foil and is not fully welded to the frames and it Should be!
it will stress crack and should be checked!
second,look at this...which mb200 do you have?..you might wanna call baja n get a new fork...
Baja Motorsports Recalls Mini Bikes Due to Fall, Crash Hazard | CPSC.gov

i also posted some tips for these bikes on another topic in Tech section/search baja warrior