starting problem

[dave36]

just got a 2001 aprilia sr50 ditech, it won,t start i,v changed plug and battery its turning over finr but just not firing up, there is a good spark from plug any suggestions

[IanAl]

Is their fuel in it?
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“It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood, who strives valiantly; who errs and comes short again and again; because there is not effort without error and shortcomings; but who does actually strive to do the deed; who knows the great enthusiasm, the great devotion, who spends himself in a worthy cause, who at the best knows in the end the triumph of high achievement and who at the worst, if he fails, at least he fails while daring greatly. So that his place shall never be with those cold and timid souls who know neither victory nor defeat.”

[dave36]

yes has fresh fuel

[Mikey CB500]

Could be the fuel pump is dodgy, the injector, the throttle body, the air compressor, the airflow sensor on the cylinder head.

Theres a number of things that could be wrong causing it to not start really, injection systems are so compicated to fault find on as theres so much to go over and check.

[Mikey3]

Carbs FTW!
Injections & electrics are all well and good... but it is just something else to go wrong on the flip side.
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'04 Yamaha WR450F
'99 SV650 Streetfighter Project - mid build
'Motorcycling is about what you do; not about what you own, or how much you spend on it'