Honda: INNOVA125i(2010); CBR250R(2013)
YES, You know how to do comparative experiments, which is beautiful and highly appreciated. But the purpose of an experiment should be defined for the purpose of locating a problem. If I am in one room in the house and manage to breathe, and I move to another room in the house and also manage to breathe, what exactly did I check here?... when i put the injector into the line. it’s no spraying at all. seems more of a leak. i get that it could be pressure isn’t strong enough from pump to keep it going but on his bike with stock the injector also doesn’t spray.
If you want to learn mechanics you have to understand how things work, and those who know less or are in the younger stages of the hobby, use the test procedures recommended by Honda, or those proven to be useful among mechanics.
It's simple for those who understand: Your engine starts when you push starting spray, it means there is a spark. And your engine manages to reach 3000 rpm and then stabilize at idle rpm, which means that there is no problem with the fuel flow to the engine, and which means that the IACV is OK. And anyway, you cleaned and replaced the entire fuel supply system. You insist on a problem at the fuel sys, problem that doesn't exist, because you work unsystematically.
The purpose of Troubleshooting Scheme is to succeed in reaching the problem by narrowing down the possibilities, because we go logically from test to test, and not in a random order. There is a method in the scheme.