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carb settings.....

Started by mikedastonfj1100, April 04, 2014, 04:04:15 PM

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mikedastonfj1100

Was wondering what to set the choke needle to... The needle that is on top of every carb body right next to the top cover....
"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...

Pat Conlon

That's the air idle screw and settings depends on your pilot jet sizes...
For stock 37.5 pilots, set the screws 3 turns out from fully seated. That will get you started.
Final adjustment should be done with the throttle 'blip test' on a warm engine.

Hope this helps.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

mikedastonfj1100

Not the screw that sits between the carbs for syncing them together... Carbs are stock as far as I know... I'll upload a photo when I get home as to what needle in talkin about...
"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...

Pat Conlon

1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

mikedastonfj1100


this is what I was talking about.... I was wondering what it is used for... and what would happen if it was all the way screwed in allowing no air flow through it... I have it 2 1/2 full turns out from fully seated... not sure if it is far enough out.....
"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...

FJmonkey

Ugh... That pic is too small to see what you want to show... More detail please....
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

mikedastonfj1100

"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...

movenon

Quote from: mikedastonfj1100 on April 04, 2014, 09:17:15 PM

this is what I was talking about.... I was wondering what it is used for... and what would happen if it was all the way screwed in allowing no air flow through it... I have it 2 1/2 full turns out from fully seated... not sure if it is far enough out.....

Small picture but it appears to be your fuel air screws. Basic setting is 2 1/2 to 3 turns out.  From there best to do a blip test and sync the carbs.
When the screw go's in it will lean out your bike and when you screw out it enriches the mixture.  It has a lot of effect from 0 to 1/4 throttle.
As a note when you are just cruising down the road at 70 mph you are probably only at 1/4 throttle.
George
Life isn't about having the best, but about making the best of what you have...

1990 FJ 1200

FJmonkey

Quote from: mikedastonfj1100 on April 04, 2014, 09:25:26 PM
I don't know how to make it bigger

Take a new picture of what you you want us to see...
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

mikedastonfj1100

I took these pics with a windows 8 phone....
"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...

mikedastonfj1100

"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...

FJmonkey

The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

andyb

As Pat said.

Dunno if you couldn't understand him, but it doesn't get any more clear than that.  3 turns out from gently bottomed is the starting point, each cylinder will likely have a slightly different sweet spot.  If you're out to 5 turns and not getting improvements, you'll need to change the pilot jets (assuming the carbs are clean internally).

Bminder

Quote from: andyb on April 05, 2014, 09:29:45 AM
As Pat said.
Dunno if you couldn't understand him, but it doesn't get any more clear than that.  3 turns out from gently bottomed is the starting point, each cylinder will likely have a slightly different sweet spot.  If you're out to 5 turns and not getting improvements, you'll need to change the pilot jets (assuming the carbs are clean internally).

Maybe a little more clarification if you've never worked on carbs before.
Take a screwdriver and gently turn them clockwise until you feel them hit bottom. Stop when you feel that so you don't damage the screws.
Then turn each screw counterclockwise 3 complete turns out and see how it runs.
Billy Minder
92 FJ1200 ABS

mikedastonfj1100

"I live my life 1/4 mile at a time. Within that 10 seconds or less, I'm free".... Fast and the furious quote said by vin dessel...