fuel line XJ1100

[dodjh]

I have bought 3 to 4 different motorcycle fuel line and none have

worked out. I put in-line filters to each carb bank and regardless

of what I do, leaving the petcock, the bend the line has to make

is always crimped. Now before you get the wrong impression

the filters are not the problem. The petcock outlets are angled

in such a way to rest down beside the air filter box, I don't see

how crimping isn't a problem. I have seen line that will take a

bend without crimping. The orginal lines were clear and black.

What size line fits and where is it available for that bikes

application?

Frustrated,
dodjh

[TopCatGr58]

Hey Dodjh,

The fuel line is 1/4" ID, single walled. You said you got MC fuel line?? With filters in line, the lines have to turn too far causing a crimp in the bend, so what you need to do is CROSS over the lines so that the right petcock is feeding the LEFT bank of carbs, and vice versa, so you can have enough slack to put the fittings on before lowering the tank, and still allow the hoses to bend some, but not as much when trying to make them go to the same side of carbs!!
T.C.

[dodjh]

fuel line

T.C.

MC is motorcycle fuel line, Yamaha, Kawasaki etc., and two

automotive parts stores. The in line filters are below the Tee

that goes to the two carb banks.

Separate subject--had carbs sychronized but A/Fuel Mixture was

still rich so I adjusted them by spark plug condition. Did this

3 to 4 times and now there is no bottom end. Rechecked

sychronization --was off and reajusted still no bottom end

power. Happens around 4 to 5K on tach. There has been

4 color tunes on E-bay but they sold for more than a new one

cost so I didn't bid. Well thats a continuing battle.

Thanks for feed back,
dodjh

[TopCatGr58]

Hey Dod,

I realized MC was motorcycle , but was just wondering about getting it from auto store...most are too thick double walled stuff, or they sell the rubber vacuum hose that gets too brittle and stretches!

You may want to rerun the lines and filters, putting the filters up higher closer to the petcocks, so that they are ABOVE the "T" fittings for the carbs, you don't want the gas to have to travel up hill much at all, since it's only being gravity fed!

You say you adjusted the AF mixture by plug color?? Do you mean you were adjusting the pilot screws? The plug color appearance is more for the mains, using the throttle chop method. I don't believe it's valid for the idle AF settings, and so you may have set yourself way too lean, hence the poor off idle response. See where your pilot screws are set...how many turns IN to get to gentle seat, if they are almost closed, then you are probably too lean. Turn them back out to at least 1.5 turns and see how it behaves....don't worry about the plug color for this adjustment...they will carbon up a bit just from idling and such, but burns off during normal rpms and running.

I don't bother with a colortune, Ken posted and I think we made it a tech tip on how to tune "by ear" your pilot screw/idle settings!
T.C.

[COOL TOM]

XJ FUEL LINES

Put Y fitting in place of the T fitting and put it in between the carbs stacks then run the filter off the bottom of the Y. Extra loop from filter to carb. That is the way I run my 82XJ and 80SG. Has worked on XJ for about 2 years. Also boys XJ is run this way.

[trbig]

Run your fuel line to opposite carbs. I was having this problem also, and actually made a bend with some copper tubing where you're having kinking probs and attached the fuel line with hose clamps to that, but I didn't like how that looked. Before that, new fuel line would hold up for a couple days... then inevitably kink. Just run your line from the left petcock to your right carbs and vice-versa. This eliminates that tight turn.

Tod

[dodjh]

fuel line XJ1100

T.C, Cool Tom, and trbig,

Thank you for your information and avenues of approach.

I'll try to find the tech tip on ear tuning air/fuel pilot adjustment.

Sincerely
dodjh