some one who has worked with bike for ever?

please help with my Derbi terra 125?

eletronic fault on my derbi senda extreme 03 plate?

Which pipe goes to where?

i have a brand new 2010 derbi senda xrace ?

Derbi Senda Excessive Fuel Consumption?

2003 Derbi Senda R50 6 speed?

Derbi Senda 50cc?

My derbi senda 50cc keeps cutting out?

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

my derbi gp1 open 50cc won't start?

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

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