Ok how long has the bike been sitting and if for more than 10 years you need new main seals, and how clean are the carbs, the pilot jet is probably dirty, clean the carbs, make sure the floats float and reconnect the injector, and try some fresh ethinol free gas, also you might want to check the strength of the spark, you may see it but it may not be enough to run the bike.
I hope these things get you somewhere, Oh BTW welcome to here
Alexa Drew Nov 9 1995- Oct 28th 2004 Miss you baby
'08 KTM 530 EXC
79 RD 400 Daytona