20 Most Recent 2007 Derbi Senda Xtreme 50 R Questions & Answers

The derbi send a has always had a problem with the thermostat failing to open which causes the engine to overheat,it also compresses the cooling system with burnt gases which pass the head gasket as the head warps with the heat,this can blow water into the gear oil which turns into mayo looking emulsified goo.so to fix it take the thermostat out and keep your fingers crossed you don't have to skim the head and fit a new head gasket ,water pump seals and fluids.

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