rebuilt carbs

[bigbore2]

I rebuilt my carbs [84 1100] and reinstalled them and am trying to figure out how to set the  airscrew? located on the front top of each carb to get engine running before I have carbs synched. The book just says it is preset.

[Pat Conlon]

Start at 3 turns out (from fully seated) Adjust as the blip test warrants.

[bigbore2]

Thanx Pat, I forgot to put in my other info.   5000 ft altitude-115 main-37.5 pilot-one clip higher on needle.   If I get it working well, do I even need to get the carbs synched?

[Pat Conlon]

Yes, always, always....always.... sync. those carbs....That should be first on your list.

If you are serious about keeping your FJ and have it run to it's full potential (sounds like you are) invest in a carb sync tool...

A Morgan Carb Tune,  http://www.carbtune.com/
...or a Motion Pro stick like Randy @ RPM sells: http://www.rpmracingca.com/products.asp?cat=49

You really, really need one.

Properly sync'ed carbs make a world of a difference on our FJ's.

[Arnie]

After you have your carbs in sync the first time, you'll be a believer.

Its so quick to do and makes so much difference that I sync every time I have the tank off.

Arnie

[Dads_FJ]

Carbs should always be synchronized right AFTER a valve adjustment as well.

[FJdude]

The carbs on my 1200 are set out at around 1 3/4 of a turn, is that not enough??

Also is there a secret to pullin those dam carbs... It's a pain in my rear trying to fit it in there with the air box. And the one time I did take the air box out...well let's just say I'm not soon that again!

[Dads_FJ]

The carbs on my 1200 are set out at around 1 3/4 of a turn, is that not enough??

Also is there a secret to pullin those dam carbs... It's a pain in my rear trying to fit it in there with the air box. And the one time I did take the air box out...well let's just say I'm not soon that again!

Swign the sub-frame down and out of the way when R&R the carburetors (you don't actually have to remove it).  Much easier than trying to fit them in.

[FJdude]

Not quite sure what you mean by subframe???

[Arnie]

Seat subframe.  Remove the upper bolt next to the battery on each side.  Then push down at the grab handles end of the subframe.

Arnie

[bigbore2]

I was thinking the other day, oh well, here goes,  synching the carbs is done with the airscrew? or is it done with the part of the carb that adjusts the butterflys so that all 4 open and close exactly the same.  I remember adjusting that by sight before I put them back in when I had all four connected together.
  Thanx for the the reminder to remove the subframe.  I put the airbox and carbs in last night and it was doable but I was just about ready to blow by the time I got done.  MUch, much harder if the subframe is not taken down.

[andyb]

The latter.  The screws between the carbs adjust their relative positions, and that's what a synch does.  What you are calling an airscrew actually meters fuel with some air in it, and is useful for getting a smooth idle and clean cruise at low engine speeds with the throttle just cracked on (cruising at 2500 revs in 4th for example).

[bigbore2]

Thank you kindly.  Boy do I love the people on this site.