How to mend Derbi Senda Sm Extreme 2007

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

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

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

derbi senda 54 plate leak?

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

please help with my Derbi terra 125?

my derbi gp1 open 50cc won't start?

Derbi Senda 50cc?

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

2003 Derbi Senda R50 6 speed?

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

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

runs fast then cuts out?

derbi senda indicators?

adam or bb from m?

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

eletronic fault on my derbi senda extreme 03 plate?

My derbi senda 50cc keeps cutting out?

derbi senda?

how to fix my petrol problem?

Derbi Senda Excessive Fuel Consumption?

faring?

Derbi Senda Wont Run When Hot?

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

i have a brand new 2010 derbi senda xrace ?

my derbi senda sm extreme 2007 ?

is the battery dead?

Which pipe goes to where?

fixing my dtr 2001 model?

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