How to mend Derbi Senda 50cc

i have a derbi senda 50cc, on starting it revs straight up to 900 rpm. ?

how do i open the valves fully on my dtr 125 02 model?

my derbi senda sm extreme 2007 ?

how can i fix my derbi senda x-treme indicators?

please help with my Derbi terra 125?

Derbi senda , no fuel coming through the pipes from the tank to the carb?

runs fast then cuts out?

eletronic fault on my derbi senda extreme 03 plate?

derbi senda indicators?

My derbi senda has orange spark and won't start ?

how to fix my petrol problem?

my derbi senda's spark plug turns black after one run? plz help?

Derbi Senda Wont Run When Hot?

i have a brand new 2010 derbi senda xrace ?

2003 Derbi Senda R50 6 speed?

fixing my dtr 2001 model?

faring?

how can i get my head bolts out they have snapped ? derbi gpr?

petrol is pushed through the exhaust port on my derbi senda 06?

Derbi Senda 50cc?

derbi senda?

adam or bb from m?

Which pipe goes to where?

my sons derbi 50cc bike was going yestewrday then it started to smoke a bit?

is the battery dead?

My derbi senda 50cc keeps cutting out?

derbi senda 54 plate leak?

Derbi Senda Excessive Fuel Consumption?

my derbi gp1 open 50cc won't start?

how to reset the service light on my Derbi terra 125?