84 FJ60 Aisin Carb Jet Question

[BlueOrwell]

Hey everyone! First time posting here so I hope I don't step afoul of anything. I've searched high and low thru the forums to find the answer to this question so posting has been my last resort. I am in the process of trying to get my 84 FJ60 up and running. This is my first *car* project (I've worked on a number of motorcycles) and my husband is helping, but for the most part I'm trying to get her going on my own. I've pulled the carburetor--which appears to be an original Aisin--and am getting ready to start the rebuild. When we pulled the jets, we noticed that there were long hairline cracks in what appears to be possibly an outer casing of both jets. They go approximately halfway up the stem. Now, I've never done a carb rebuild and used the original jets (always replaced), however, I am aware it is impossible to get the OEM ones (I've been looking for weeks, fwiw). Bc of this, both my husband and I are unsure if we can reuse these jets, or if this means I should get a whole new carb? Is it worth it to attempt a rebuild on this carb with these jets, or am I dead in the water?

 

[sark]

Looks like this thread may be helpful:

Possible Alternate Carb Main Jet Sources? Thread size and pitch info needed

forum.ih8mud.com

 

[CruiserTrash]

Hey everyone! First time posting here so I hope I don't step afoul of anything. I've searched high and low thru the forums to find the answer to this question so posting has been my last resort. I am in the process of trying to get my 84 FJ60 up and running. This is my first *car* project (I've worked on a number of motorcycles) and my husband is helping, but for the most part I'm trying to get her going on my own. I've pulled the carburetor--which appears to be an original Aisin--and am getting ready to start the rebuild. When we pulled the jets, we noticed that there were long hairline cracks in what appears to be possibly an outer casing of both jets. They go approximately halfway up the stem. Now, I've never done a carb rebuild and used the original jets (always replaced), however, I am aware it is impossible to get the OEM ones (I've been looking for weeks, fwiw). Bc of this, both my husband and I are unsure if we can reuse these jets, or if this means I should get a whole new carb? Is it worth it to attempt a rebuild on this carb with these jets, or am I dead in the water?

View attachment 3883509

Damn, never seen that before. I've heard the main jets in the bottom of the float bowl can be replaced with certain Mikuni motorcycle carb jets, but I'm not sure about the ones in your photo.

Does anyone know if the 40 Series carb rebuild kits come with these jets? There might be some other possibilities here.

 

[BlueOrwell]

Damn, never seen that before. I've heard the main jets in the bottom of the float bowl can be replaced with certain Mikuni motorcycle carb jets, but I'm not sure about the ones in your photo.

Does anyone know if the 40 Series carb rebuild kits come with these jets? There might be some other possibilities here.

The Keyster kit for the late 60s FJ40 (CARB60144) looks like it includes two equal lengths jets, but the info I can find in regards to the jet sizes seem to indicate a much smaller jet. I can't seem to find any kits or literature on the FJ60 addressing these jets and it's driving me bonkers lol

My understanding is that if I get a new carb (like from City Racer) I am forced to desmog as well?

 

[Pighead]

Does anyone know if the 40 Series carb rebuild kits come with these jets?

The Keyster kits for earlier carbs do indeed come with all kinds of jets that are never the size you want...

 

[Spike Strip]

The Keyster kit for the late 60s FJ40 (CARB60144) looks like it includes two equal lengths jets, but the info I can find in regards to the jet sizes seem to indicate a much smaller jet. I can't seem to find any kits or literature on the FJ60 addressing these jets and it's driving me bonkers lol

My understanding is that if I get a new carb (like from City Racer) I am forced to desmog as well?

There are Four jets in your carb: Two smaller jets in the float bowl, and the two slow jets you hold in your finger, above.

The kit you list above is for an earlier carb 1969 and is not correct for your application, although the slow jets will 'fit' (I think), they are not the same size as in your FJ60 Carb. The Keyster kit for 80-87 FJ60 is EK11-0383A LINK but does not include the slow jets. The 'size' of those jets corresponds to the size of the orifice at the small end of the shaft. The size will be stamped on the flat top. I don't remember off-hand what the USA sizes are. Edit: Slow primary 65, Secondary 90. Main Jets, stock, are 1.47 primary and 2.00 Secondary.

If you can de-smog, there are several options for you: You can buy a Toyota non-usa carb for $1000 (top quality), a Japanese aftermarket for about $350 or various Chinese clone carbs for around $100 available on ebay, amazon, MUD vendors, ets - quality is very hit 'n miss.

With a non-usa carb you will lose the High-Altitude-compensation system that adjusts the carb Air/Fuel mix if you happen to travel over 4000 ft elevation.

Honestly, these FJ60 Carbs are complicated and parts are scarce. I get that you want to tackle the challenge, and don't want to dissuade you from it, but if you want to keep the stock carb, the rebuild might be best left to one of the MUD Carb gurus on the board. I say this because you'll have to buy multiple carb kits and perhaps hunt down other parts and it all adds up quickly, whereas the rebuilder will have spare parts cores and the knowledge to properly tune the carb to run on modern gasoline.

There are a few good Youtube videos on rebuilding the Aisan carbs, should you still want to tackle it. Strongly suggested to watch them first, if you haven't already.

Good luck!

 

[BlueOrwell]

There are Four jets in your carb: Two smaller jets in the float bowl, and the two slow jets you hold in your finger, above.

The kit you list above is for an earlier carb 1969 and is not correct for your application, although the slow jets will 'fit' (I think), they are not the same size as in your FJ60 Carb. The Keyster kit for 80-87 FJ60 is EK11-0383A LINK but does not include the slow jets. The 'size' of those jets corresponds to the size of the orifice at the small end of the shaft. The size will be stamped on the flat top. I don't remember off-hand what the USA sizes are.

If you can de-smog, there are several options for you: You can buy a Toyota non-usa carb for $1000 (top quality), a Japanese aftermarket for about $350 or various Chinese clone carbs for around $100 available on ebay, amazon, MUD vendors, ets - quality is very hit 'n miss.

With a non-usa carb you will lose the High-Altitude-compensation system that adjusts the carb Air/Fuel mix if you happen to travel over 4000 ft elevation.

Honestly, these FJ60 Carbs are complicated and parts are scarce. I get that you want to tackle the challenge, and don't want to dissuade you from it, but if you want to keep the stock carb, the rebuild might be best left to one of the MUD Carb gurus on the board. I say this because you'll have to buy multiple carb kits and perhaps hunt down other parts and it all adds up quickly, whereas the rebuilder will have spare parts cores and the knowledge to properly tune the carb to run on modern gasoline.

There are a few good Youtube videos on rebuilding the Aisan carbs, should you still want to tackle it. Strongly suggested to watch them first, if you haven't already.

Good luck!

Definitely agree it's not the right carb kit! Just the only one I found that remotely resembled these slow jets. I can definitely desmog in my state, so it's feeling like that may be in the best interest of getting the truck running. Considering the number of other things that will require overhaul (like the gas tank, brakes, and whole new interior) it's starting to feel like I should box this carb up real nice and maybe store it away from a future restoration effort by a more experienced person for these. I have watched a few videos and done a few motorcycle carbs but this one has me doubting myself for sure.

 

[Spike Strip]

Maybe @NeverGiveUpYota who is also in that area can give you some guidance on sources - She walked this walk very well, already.

Builds - Work In Progress aka: Badass

Female enthusiast off and on mud since '10 but first cruiser in hand was in 5/'08 thanks to a young guy I was dating who had a wealth of mechanical know how... that truck became my DD in 6/'10 after my little kermit the frog green kia rio threw a piston in her second engine (first went just...

forum.ih8mud.com

 

[mattressking]

Two items.

1. Yes I've seen them crack, morseo on 60 carbs than 40. The actual jets will fall out with compressed air so inspection of both slow jets is required.
2. You won't find slow jets from a 40 kit, incorrect sizing. You can only use napco 3F carb kits and you'll only find 65. 90 is available but I can't recall which kit offhand.

If you need slows, message me which, 65,90 or both.