Lunchbox and Jetting, Quick questions!

[The Buddha]

Jetting usually needs to be done backwards ... mains first then needle then mids and then pilots.
But A 89-00 GS will not take any pilot larger than a 40 in stock engine trim and a 01+ will not take anything larger than 22.5 ... unless something else is off - like float level ... so you could actually do it "forwards" depending on your setup.

Cool.
Buddha.

[Jayke]

I get paid this weekend so I will probably end up buying some different jets, and float levels? How can I check they're correct? Didn't know you could mess with them.

I really need to find a way of getting that last top carb screw out though, hopefully doing my valves/tappets this week so I will have another bash at it then I guess!

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[radodrill]

and float levels? How can I check they're correct? Didn't know you could mess with them.

On the 01+ 3-jet carbs, the float level isn't very adjustable.  Basically, you can use a piece of clear fuel grade tubing and attach it to the drain nipple, set the petcock to prime, and hold the tube in a U-shape; with the bike upright, when you open the drain screws the fuel level in the tube is even with the level in the bowls, you want it to be about even with the top of the bowls (where they mate with the carb bodies).  If this is off, you can bend a little tang on the floats to adjust when the needle valves are opened.

[Crasm]

I get paid this weekend so I will probably end up buying some different jets, and float levels? How can I check they're correct? Didn't know you could mess with them.

I really need to find a way of getting that last top carb screw out though, hopefully doing my valves/tappets this week so I will have another bash at it then I guess!

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You could try drilling and try using an easy out to get it out. Alternativly drill the head off remove top cover and grip the thread with a pair of mole grips and spin it out.


Not long for me to find out how bad this world of hurt actually is

[Crasm]

Radodrill - the e clip is moveable in my carbs , does movung the clip down raise the needle and richen the mixture and moving the clip up mives the needles diwn and lean the mixture??

[The Buddha]

Radodrill - the e clip is moveable in my carbs , does movung the clip down raise the needle and richen the mixture and moving the clip up mives the needles diwn and lean the mixture??

All the typos aside - up as it sits in the bike make it richer. Down as it sits in the bike = leaner.
Cool.
Buddha.

[Crasm]

Thanks buddha 

Typos = stupid smart phone qwerty keyboard not big enough for my thumb 

[radodrill]

Radodrill - the e clip is moveable in my carbs , does movung the clip down raise the needle and richen the mixture and moving the clip up mives the needles diwn and lean the mixture??

you can use the e-clip for coarse adjustment and thin flat washers for fine adjustment.

[Crasm]

Well tomorrow morning is d-day for me . Cant wait to get it done and see what its like 

[Crasm]

First question of the day . . Theres a black rubber pipe that comes off the bottom of airbox
Splits into 2 pipes that go to the cylinder head. 1 at each cylinder.
My quedtion is once the lunch box is fitted what do i connect the pipe to??

[radodrill]

The stock airbox has 3 tubes attached to it:
- Top is the engine top breather vent (to airbox), with the LB you can leave this tube open or attach a small filter
- Verv bottom is an airbox drain
- other bottom tube goes to the PAIR system, which I believe is what you are referring to.

The PAIR is just some emissions crap that pushes fresh air into the exhaust headers to fool the emissions sniffers.  You can remove this and either install block-off plates at the engine or cap those2 tubes with vacuum caps.

[Crasm]

Ok thanks for that
Ive fitted my jets , adjusted mixture screws to 3 turns out
Lowered the e clip 1 notch on the needle which i presume highers the needle . .
Put it all back together and now im leaking fuel from somewhere??

[radodrill]

Ive fitted my jets , adjusted mixture screws to 3 turns out

Any idea where the fuel is leaking from?

Did you seat the mixture screws then out 3 turns or just out 3 turns from original location (should do the first)?

Did you take out and inspect the needle valve (under the floats)?  Sometimes small particles get in and hold it open.

Did you check/adjust the float level? Could be set too high.

What position is the frame petcock in?

[Crasm]

I.wound it in all the way so it was seated and then out 3 complete revolutions.

Ive found the fault - my own chicken up!!

The screws that hold the bowls on , the back 2 next either side of the float hinge :- didnt realise the screws dont go through like the other 2 , they seat in the carb body , well i replaced the nakered screws with slightly longer allen head bolts and just done them up until tight not realising thry had just stoped in the carb body and not pinching the bowl to the body , just looked like it was because the other 2 screws had been nipped up first it looked done

Doh!!

[Crasm]

Anyway ive shortened the bolts and now carbs are ready to ho back on tomorrow morning
If no leaks ill take it for a test ride and report back.

I can confirm that the uk model is fitted with a movable needle , that the mixture screws are not capped and the standard jetting is 17.5 / 60 /130
I have a picture of the needle and some internal pictures of carbs that i will post up later

Final thought for now is the standard bowl screws got completly wrecked but came out with no trouble. The top cover screws were a big problem , had to use a dremel to cut a slot into the m
And they still stood firm until i hit them with a blow torch then they cracked straight out.
Bit of advice for any one planning this   

[radodrill]

At least you got it back together and had the right thread screws to replace the overtightened OE screws

[Crasm]

Few carb pictures

[Crasm]

[Jayke]

That is one clean carb! Well, at least compared to mine lol!

Any luck yet?

I've been riding mine on 20/62.5/147.5 I think it is now,  for about 250 miles or so, the nut that I put in the exhaust which covers up the baffle hole, is extremely black, assuming this means it's rich, but after 70mph the acceleration is pretty much none existent. So now I've gone from thinking the bike is rich, to lean. I don't even know, I'm still a little clueless to it all, even after all the help!

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[radodrill]

That is one clean carb! Well, at least compared to mine lol!

Any luck yet?

I've been riding mine on 20/62.5/147.5 I think it is now,  for about 250 miles or so, the nut that I put in the exhaust which covers up the baffle hole, is extremely black, assuming this means it's rich, but after 70mph the acceleration is pretty much none existent. So now I've gone from thinking the bike is rich, to lean. I don't even know, I'm still a little clueless to it all, even after all the help!

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You're going to get some black soot in the exhaust regardless of weather you're running rich or lean.  That nut looks normal; by no means rich soot.

Have you been able to adjust the needles yet?  Having them too low can certainly be causing problems.