Carburetor screws glued??

[Old Rider]

Hi today i have been taking the carburettors off ,the plan was to do a cleanup.That didnt work because i can not open the 4 screws that sits i bottom holding the
cup. Its the same on all 4 craburetors.I have got tools that fit perfect in the phillips screw slot but the screws gets destroyed .So then i gave up on losening the screws,and decided to just spray them with carburettorcleaner from all angels and into the drain hoses. Does that help cleaning up the worst dirt innside?

Also tok off the carburetor rubber inntakes witch has a lot of cracks because im going to replace them.I dicovered that on innside they look fine no cracks even when
squized .Can they still leak air in that state??.

[FJmonkey]

A bit late now but you need a JIS bit to fit the screws properly. A Philips tends to round them out. http://www.instructables.com/id/When-a-Phillips-is-not-a-Phillips/step10/JIS-Japanese-Industrial-Standard/

You might have some luck with a small hammer driven impact driver and an extractor bit like this.
http://www.mcmelectronics.com/product/ALDEN-CORP--3701P-/22-10990
http://www.harborfreight.com/impact-screwdriver-set-with-case-37530.html

If you can acces the damaged screw heads with a Dremal like tool then you can cut slots in them.

Or you could send them to rpmracingca.com, they rebuild carbs with stellar results. And you will get all the fasteners replaced with SST hex socket screws to make future work very easy.

[Bones]

You could try clamping the side of the screw head with some vice grip lock pliers and see if it'll loosen.

[Pat Conlon]

Yep, as Bonesy said, those vice grips are bitchen tools....You are gonna throw those soft bastards away anyway so get aggressive, bite the piss out of those JIS screw heads and see if they will turn.
If that fails you, I used a Dremel and cut a slot in the heads then used an impact driver with a flat blade tip to loosen them.

Spend $22 and buy this:
http://rpmracingca.com/proddetail.asp?prod=carbkit

You will never have to worry about this issue again, along with all the O rings you need.
Be sure to replace those O rings on your float needle seats.
You really need this kit.

[Tor-King]

Old Rider, the best way (only way) to clean the carbs properly is to separate all the carbs.  Placing them in an ultrasonic cleaner is a great method as it is non-toxic yet a very effective way to clean.  They have to be taken apart to get to all those o-rings that are probably rotten after all these years.  As Pat and Mark suggested, PLEASE replace all screws with the kit from RPM.  As far as the rubber manifolds, they may not leak where they are showing cracking, BUT it is critical to replace the O-ring where it connects to the head.
Have fun,
Dean

[aviationfred]

As mentioned, the RPM screw kit is one of those peace of mind items. Once installed, you know you will never fight with them again.

Here is a shot of a couple installed......

Fred

[movenon]

+1 +++ on the screw kit.  Never regretted installing them. IMO the JIS screws are pain in the ass.
George

[Urban_Legend]

Really love the RPM Screw kit, so another +1 on that. Not sure if mentioned, but a firm trap on the screw with a hammer and screwdriver can often "release" the stuck threads (impact driver or sacrificial screwdriver here). Just don't go swinging at the things like your are cutting fire wood, the alloy doesn't like that, which will make you swear.

Mark

[PaulG]

Yes get the kit.  I have been playing with my needle hight adjustment chasing a lean condition. (Cuz some idiot didn't set them right the last time he farted around with them. ).  Having the kit installed allowed me to take the caps on/off 3-4 times without any issues.  My original screws were pooched to the point I had to grind a couple off with a dremel.  Also makes the job quicker.

BTW - go to your local nut'n'bolts supplier and pick up a set of allen head countersunk screws for the brake/clutch master cylinder caps.  Or order these  Allen Head Brake Reservoir Cap Screws  from RPM when you order the carb screw kit.  Barely got mine off to replace them cuz they were so chewed up from using philips instead of JIS.

[giantkiller]

+1 on the RPM screw kits. Have put them on all the carbs. The first time I have to take a set apart I have them ready to replace all the crappy screws.

[ribbert]

Yep, as Bonesy said, those vice grips are bitchen tools....You are gonna throw those soft bastards away anyway so get aggressive......

Those screw heads are rounded, not very big and not easily gripped using vice grips in the usual manner, they just slip off.

I have found a foolproof way to get them out every time is like this....



Taking advantage of the force vice grips can apply, you can actually squeeze "flats" (arrowed) on the screws then just twist, they loosen easily.
I have tried every method many times and this seems to work best and quickest and if need be, leaves the screw reusable.

As everyone else has already said, the carb screw kit is great value at $22.

Some years ago I bought a whole bike, FJ specific, SS allen head bolt and screw kit on eBay. It came in about 6 bags with a detailed sheet in each for the location of the contents, very well packaged. it also included the screws for the master cylinders that someone mentioned, great idea. I never used most of it.

They might still be available, as I recall the price was very modest for the hundreds of pieces in it.

Noel

[FJmonkey]

Great image to demonstrate the technique Noel.

[Old Rider]

No way im gonna buy that kit.....        Just kidding of cource i have to buy that ,but for now i just want to get the bike back  on its feet fast because
season is over soon here in Norway and i just want to riiiiide .Thanks for all suggestions to open those succers!
Another thing i notised on my carburetors is that the drainscrews has a small sized hose on them going up to the backside of airbox to the inntake rubbers into a little box with an adjustmentscrew on top of it. Whats that about?? i also forgot to mark where they sat.Shall they sit like the cylinder 4 carburettor on the forth airbox inntakerubber?

[FJmonkey]

No way im gonna buy that kit.....        Just kidding of cource i have to buy that ,but for now i just want to get the bike back  on its feet fast because
season is over soon here in Norway and i just want to riiiiide .Thanks for all suggestions to open those succers!
Another thing i notised on my carburetors is that the drainscrews has a small sized hose on them going up to the backside of airbox to the inntake rubbers into a little box with an adjustmentscrew on top of it. Whats that about?? i also forgot to mark where they sat.Shall they sit like the cylinder 4 carburettor on the forth airbox inntakerubber?

Can you post a picture of the hose on the drain screws and the box it goes to?

[Old Rider]

I have the carbs off the bike now but i can try to post pictures tomorrow. The hoses is about 4mm diameter and connected on the drainscrews witch look like a bleednipple with the hose connected over it. They goes up on top of the airfilterbox backside in top of the rubbers that connect the airbox and carburettors and connects to a little scuare box with a adjustmentscrew with numbers on it. I cant find any drawings of the hoses on any workshop drawings nor any partsnumbers.