Exhaust??

[Fire2235fighter]

I have stock 4-2 on now i going to put 4 to 1 on do i have to redo the jets????

[TopCatGr58]

Hey there FireFighter,

Take a look at this tech tip:DennyZ's Jetting guide
T.C.

[Fire2235fighter]

Thanks

Thanks for the reply T.C. i think i will have a local shop take care of for me. i dont think i have the knowlege to do it. i'm gonna put the 4-1 on and see if it runs right or not and go from there..Thanks for the input!!

[corey]

No need to send it to a shop, my friend. Rejetting is easy when you have Denny's guide. You see, the hardest part of jetting is determining the proper sizes, and the guide does that for you! Also, other posts on this forum won't let you go to far astray if you get confused.

Trust me man, if you are skilled enough to change the pipes, you are skilled enough to change the jets.

[pggg]

Here we go fireman. Give yourself a day or two for a start. 1. Remove the seat, gas tank and associated hoses.

2. Undo the 3 bolts holding the airbox so it sits loose.

3. Undo the bottom wingnuts and remove the air filter.(clean it!)

4. Remove the rubber hoses and throttle cable from the carbs.

5. Loosen up the fore and aft metal bands holding the carbs.

6. Spray WD40 or suchlike on the rubber boots.

7. Jiggle and slide the carbs out to the left hand side. Be patient and watch out for the top oil line bolt that gets in the way.

8. That's the hardest part done.

Now you can strip and fiddle with the carbs at your leisure. Simple basic stuff actually.

Rejetting aint something that's absolutely necessary with a 4-1 anyway. Picking you'll feel a top end boost without changing jets if the 4-1 's a good one.

[fxrer]

Hey Firefighter,

If you decide to remove and re-jet the carbs yourself (which isn't that tough), go to tech tips, maintenance, carburetors. There is a valuable tip, from Mike Farnworth, on an easier way to remove the bank of carburetors.

In addition to doing everyting Pggg suggests, here's the tip from Mike:

Quote:

"Taking the carburettors off the bike is a real pain if you follow the manual. According to it, the air filter housing is pulled rearward after the three mounting bolts are removed. The housing is only able to move about 3 cms, and you are then expected to wrench the carbs free by relying on the rubber elasticity of the intake and air filter adapters. No way! Anyone who has had an XS1100 for a while will know how prone to cracking the carb/cylinder adapters are and at $30 each I wasn't happy with putting undue stress on them.

The answer? Remove the lower part of the filter housing including the filter. Undo the four screws holding the V-shaped bracket BUT only by two turns each. The V-shaped bracket can then be moved forward and the whole housing can then be dropped below the level of the carbs leaving plenty of room for carb removal. If these four screws are undone completely it's very awkward to replace them in situ."

Mike Farnworth
=====

I used this techinque and it is MUCH easier to remove/replace the carbs.

But, like he says, loosen the four screws ONLY two turns each, because if they come apart, it is VERY tough to get all the pieces back together.

good luck

BTW, what condition is your old exhaust, and what are you doing with it ?

[Fire2235fighter]

Thank

Thanks everyone i'm gonna give it a try when i get my exhaust. wish me luck

[John]

I have found that instead of loosening the four screws as described above, the foward attaching point can be forced past the mounting point on the frame, and then the air box will fall out of the way. It will not come out of the frame with the carbs still in place, but makes the job much easier. Another tip... don't try to disconnect the throttle cable until you have the cars free from all boots and are ready to actually pull them out. Slide them to the left, and twist them clockwise, and that makes the cable very accessable and very easy to remove. The same goes for installation. Slide the carbs part way in and install the cable.

[Fire2235fighter]

Thanks John

when i go to do the job i will try that. anything that will make the job easier i will try

[don07tncav]

I also use John's methoud and it works out a lot better. Use a flat blade screwdriver to pop the airbox holder over its attachment and the carbs are much easier to pull.