CBR250R heart transplant, now won't run

[eldog]

I do however have the carb boot rings loose as the carbs have been on and off so much, might tighten those up and give that a go

you could always make up a spray bottle of soapy washer (from under the sink)
good way of detecting leaks/vacuum once it is settled.

cant do much harm apart from cleaning the bike.

[nzspokes]

What would prevent flow from carb to motor? Jets are clear, plenty of vacuum.

Will drop thimble of petrol down each throttle body and try that way.

Definately not getting a fine mist

I do however have the carb boot rings loose as the carbs have been on and off so much, might tighten those up and give that a go

Because for the first start it needs a chunk of vacuum to pull the fuel through the circuits in the carbs.

Pour fuel into the plug holes.....

[Icemaestro]

What would prevent flow from carb to motor? Jets are clear, plenty of vacuum.

Will drop thimble of petrol down each throttle body and try that way.

Definately not getting a fine mist

I do however have the carb boot rings loose as the carbs have been on and off so much, might tighten those up and give that a go

loose carb boots = air leak = massively lean....and suggest check choke cable operation. as someone said before plugs should be soaked if you have been trying to start full choke (and you mentioned full throttle as well...don't do that! normally you should have flooded it with that)

[nzspokes]

Running yet?

[kiwi-on-wheels]

Nope. Plugs wet, but still not firing

Flattened battery, chucked multimeter across the car battery im using to help diagnose, 10.5v cranking.

Soooo, both car and bike batteries are on charge, and i'll try again tomorrow

[eldog]

Describe wet

[gsxr]

Nope. Plugs wet, but still not firing

Flattened battery, chucked multimeter across the car battery im using to help diagnose, 10.5v cranking.

Soooo, both car and bike batteries are on charge, and i'll try again tomorrow

Maybe just maybe both your batteries are fucked .Each battery cell is 2.1 volts so you have 1 dead cell.
Charging it wont fix that youll still only end up with 10.5 volts.
Given that you need 12 volts for the starter it leaves nothing for the rest of the electrics.
It doesnt matter how big a battery you put up its arse if its not registering over 12v then its not going to be a happening thing
Appears to me you have both a battery problem and an air leak to compound your problem
As previously stated you need vacuum to drag the fuel and any air leaks will lean the mixture as well
Do the soap test as previously stated check vacuum hoses and get a new fucking battery

[kiwi-on-wheels]

Nah the battery is fine, iv just been trying all sorts of things and a lot of cranking so I expected a bit of flatness tbh.

Will check my loaded voltages tonight.

Carb boots are all tight now, no leaks there.

Describe plugs wet... They have a tiny amount of petrol on them. Not dripping off, more a light film

[nzspokes]

Did you pour fuel into the plug holes?

[kiwi-on-wheels]

Not down the plug holes as they drop a long way into the head, I went down through the throttlebodys

[eldog]

get a squeegee bottle or a funnel and a tube
I doubt it needs to be much, your not sinking the Titanic

fire in the hole?

[nzspokes]

Not down the plug holes as they drop a long way into the head, I went down through the throttlebodys

So now you have fuel but no bangs. So has to be spark. Are you 180 out?

[eldog]

So now you have fuel but no bangs. So has to be spark. Are you 180 out?

Nail on Head I reckon.
or the cable is faulty

[kiwi-on-wheels]

Nope timing bang on, coils match where they are supposed to, leads to the right place, plus wasted spark setup coils

[eldog]

Nope timing bang on, coils match where they are supposed to, leads to the right place, plus wasted spark setup coils

and you have checked the spark is happening

Clutch in
Neutral switch
kill switch
Air Filter

Just start from the beginning - don't assume anything

Whats coming from the exhaust

Take a photo of the spark plug see it you can put it on here Spokes may have a comment...

It sounds frustrating.....