Project First bike, the FZR250 3LN

Did you check the fuel level?
Attempt to start it with the choke on?

Get it to fire properly first because after you've done all of that work on cosmetics and electrics you won't likely want to deal with it not running, that would deplete your enthusiasm, it happens often with projects

Carbs used to be buggers until we all worked out all of the issues, you'll get answers to every question and solutions to every problem here

I recon with the km's you have on the clock, your needles and emulsion tubes will be fine

Did you soak the carbs in petrol, there's a small cavity inside the float bowl chamber, sealed with a bung.
This cavity feeds the idle circuit and if there's sludge or varnish in there it likely won't start or idle

BTW it will be much more difficult to start without the airbox in place - lid off for a wee bit of petrol, then if it fires, pop the lid on

 

OK to get anywhere with this, you need to let us know what suggested steps you've taken otherwise it will get repetitious and no-one will know where you're up to with the troubleshooting - it becomes pointless at a certain stage.

To soak the carbs, remove the tops and diaphragm/slides, remember that the two inners slides and out slides have, or should have either different needles or needle heights.

The rubber of the diaphragms and the plastic of the tops is petrol resistant, but it will pool in there if you just dump them in petrol.
I'd also remove the float bowls FWIW.

Get an appropriate container - a ~$5 container from Woolies or the like will suffice, fill with petrol, dunk in, leave it for an hour or so, lift out, turn and put back in facing another way.

Then when you reinstall them, connect the fuel and fuel pump, power it and check the fuel levels as described earlier - fuel level is the most important factor to getting them running properly beside the worn emulsion tubes, but I don't think that yours will be substantially worn at this stage.

Also given that it tried to fire when you shot some petrol down the carb throats, it will likely start with choke on, once they've been soaked which should work to clear any blocked jets, especially the idle jet circuit

 

OK - you need to be looking in from the back at the casting mark on the bowls from this picture - in this shot - the fuel level would be at #7 - which is ~9.2mm above the casting mark on the float bowls



From this post

https://2fiftycc.com/index.php?threads/my-fizzer.872/page-32#post-15537

The fuel level is 9.2mm above the casting mark line - to actually see it clearly the tank needs to be off as well as the airbox obviously, which is why I took the shot with them off of the bike entirely, so that I could show it

It can be tricky propping the tank somewhere so there's fuel flow available, unscrewing the petrol tap from it's mount can give you a bit of movement to accomplish this

Which reminds me, there is a good possibility that there's accumulated gunk on the fuel filter in the tank itself.

Was there any surface rust in the tank, or old stale fuel?
If you don't have a lot of fuel in the tank prop it forward or backwards towards upside down and remove the filters from underneath to check their condition.

Don't worry you're getting there, but from what you've done it looks like they're not flooding, which is good and the difference might be down to bits if varnish or something else blocking some needle seats and making them close late

 

Yes, I'd say there's blockages in your fuel supply back at the filters in the tank to start with, that's why you could get it to pop with a little juice down the carb throats, but of course it wouldn't run because it looks like there was at best insufficient fuel in the bowls.

Soak them, sort the filters in the tank then give it another shot

 

OK, so just to recap and check - one coil wired to plugs "1 & 4", the other coil wired to plugs "2 & 3"

The popping out of the intake to me says that coil plug switch is making it backwards, so switch it back to how it was

a small amount of petrol down the carb throats get you any joy

AAH and with the choke on?

 

Yes, it sounds like the inline fuel filter was blocked, start ya bastard is a good next step

 

You have to spread the copper wires inside apart so the screw can grab the soft section of the lead.

 

Been years since I dealt with those wires at the coils, from memory however I think I applied a little grease to make refitting the clips simpler - OH and I swore heaps