20 Most Recent 2011 Derbi Senda DRD Pro 50 SM Questions & Answers

have you checked how much compression there is , 100psi or above ! no less !!

remove carb and clean the jets etc and replace the fuel as it will be bad !! new plug be good !

first have the head trued at a machine shop then get new head bolts, clean mating surfaces spotless with a non residue cleaner such as brake clean DO NOT TOUCH ANY SURFACE AS YOUR FINGERS LEAVE DEPOSITS that includes the gasket, torque to manufacturer spec with lightly oiled bolts,

I know you said you cleaned the carb, but maybe something got in the carb when trying to start the bike. Because it sure sounds like you have a clogged pilot jet.

Fixya is unable to source parts.

One of these. You buy by make and model, not by size. https://www.google.com/search?q=2008+derbi+terra+flywheel+extractor.

What state is the battery in? Fully charged? Did it work before the overhaul? Check your wires again from top to bottom

Use a airlift or comparable coolant system air removal/refill system.You attach the unit to the coolant system filler and it vacuums all air from the system,then you use the supplied hose to return the coolant into the vacuumed system.This fills the system with just coolant and no air.

cycle oil..30wt..or car