Hi
I've (last weekend) broken in a fastrax enduro and I must say it was an absolute pleasure. First ever start took 5 pulls, easy to start and keep running every time since.
I'm going to be leaning it out this weekend
Right....
Box needle settings are too lean.
I used a p3 plug
Heat the engine well before trying to start it. REALLY IMPORTANT.
I personally opted for a lower nitro fuel with tons of oil (20% and 14% respectively)
Loosen the glow plug before starting, tighten once started.
I also stripped, inspected, cleaned, lubed, sealed and re-built before first use, although not strictly necessary. That said the bolts wernt evenly torqued on any component.
Mark BDC on the fly wheel, keep it at BDC before attempting to start and when cooling down.
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Needle settings:
Back the LSN right off, set the idle gap 1-1.5mm. Set the MSN as per manual (flush IIRC). Hold the carb shut then screw in the LSN untill you feel resistance, don't over do it, make sure the MSN doesn't move.
Unscrew the LSN to the amount the manual says in full turns.
Screw the HSN in untill you feel resistance, unscrew in full turns the amount in the manual.
Happy days!