some one who has worked with bike for ever?

eletronic fault on my derbi senda extreme 03 plate?

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

2003 Derbi Senda R50 6 speed?

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

Derbi Senda Excessive Fuel Consumption?

my derbi gp1 open 50cc won't start?

please help with my Derbi terra 125?

Which pipe goes to where?

i have a brand new 2010 derbi senda xrace ?

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

Derbi Senda 50cc?

My derbi senda 50cc keeps cutting out?